Display device and method of manufacturing a display device

Abstract

The present disclosure relates to a display device and a method of manufacturing a display device, the display device including a first substrate that is curved, a second substrate that is opposite to the first substrate, a plurality of connection pads disposed on a side surface of the first substrate and a side surface of the second substrate, and at least one flexible circuit board including a plurality of protrusions respectively coupled to the plurality of connection pads, wherein the plurality of protrusions form an array of protrusions along an edge of the side surface of the second substrate.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0022753, filed on February 25, 2020, which is incorporated herein by reference for all purposes, as fully set forth herein. Technical Field

[0003] Exemplary embodiments of the present invention generally relate to display devices, and more specifically, to methods for manufacturing display devices. Background Technology

[0004] With the evolution of multimedia technology, display devices have become increasingly important. Therefore, various types of display devices, such as organic light-emitting diode (OLED) devices and liquid crystal display (LCD) devices, are currently used. Such display devices are used in a variety of applications, including mobile electronic devices such as smartphones, smartwatches, and tablet PCs.

[0005] There exists an area where a driver IC or other printed circuitry is disposed on the periphery of the glass substrate of the display device. This area may be referred to as a bezel, which is a non-display area where no image is displayed. In a tiled display device in which several display devices are arranged in a grid pattern to form a large screen, the display devices are connected to each other. Therefore, a non-display area is formed where the bezels of two adjacent display devices are set together.

[0006] The information disclosed in this background section is only for understanding the background of the inventive concept, and therefore, the above information may include information that does not constitute prior art. Summary of the Invention

[0007] The applicant recognized that the non-display area where two adjacent bezels of adjacent display devices in a video wall obstructed the viewer's experience, causing the viewer to see disturbances in the expected image observed throughout the video wall.

[0008] The display device constructed according to the principles and exemplary embodiments of the present invention significantly reduces the bezel of a curved display device, thereby enhancing the viewing experience. For example, a flexible circuit board can be attached to the side surface of a curved display panel to significantly reduce the bezel area.

[0009] The method for manufacturing a curved display device according to the principles and exemplary embodiments of the present invention significantly reduces the bezel area of ​​the curved display device.

[0010] Additional features of the inventive concept will be set forth in the description which follows, and these additional features will be partly apparent from the description, or may be learned by practice of the inventive concept.

[0011] According to one aspect of the present invention, a display device includes: a curved first substrate; a second substrate opposite to the first substrate; a plurality of connecting pads disposed on a side surface of the first substrate and a side surface of the second substrate; and at least one flexible circuit board including a plurality of protrusions respectively coupled to the plurality of connecting pads, wherein the plurality of protrusions form an array of protrusions along an edge of the side surface of the second substrate.

[0012] The protrusion may include bumps extending in different directions.

[0013] The angle defined by the imaginary lines of adjacent bumps can be substantially constant throughout the different regions, wherein the imaginary lines can extend in the direction in which each of the bumps extends.

[0014] The at least one flexible circuit board may further include: a protrusion region defined as a region along an array of protrusions from an edge of a protrusion disposed at one end of the array of protrusions to an edge of a protrusion disposed at the other end of the array of protrusions, wherein the protrusion region may partially overlap with the side surface of the second substrate, wherein the overlapping region may include a first region disposed on one side of an imaginary centerline and a second region disposed on the other side of the imaginary centerline, the imaginary centerline dividing the flexible circuit board substantially equally and extending in the length direction of the flexible circuit board, and wherein the first region may be substantially equal to the second region.

[0015] The first region and the second region have shapes that are substantially symmetrical with respect to the imaginary center line.

[0016] The protruding region may include a bump region, and the protrusion may include bumps arranged substantially symmetrically with respect to the imaginary center line in the array of bumps.

[0017] The distance between the outer edge of the protrusion located at one end of the array of protrusions and the outer edge of the protrusion located at the other end of the array of protrusions can decrease toward the center of curvature of the second base.

[0018] The distance between the outer edge of the protrusion located at one end of the array of protrusions and the outer edge of the protrusion located at the other end of the array of protrusions can be substantially consistent throughout the different regions.

[0019] An adhesive film may be provided between the protrusion and the connecting pad.

[0020] The adhesive film can be configured to cover the entire connection pad.

[0021] The array of protrusions can have a substantially constant length over the thickness of the second substrate.

[0022] The spacing between one edge and the other edge of the flexible circuit board in the direction of the array of protrusions can be substantially consistent throughout the different regions.

[0023] In the region where the second substrate overlaps with the flexible circuit board, the spacing between the edges of the flexible circuit board in the direction of the array of protrusions can decrease toward the center of curvature of the second substrate.

[0024] The at least one flexible circuit board may include a plurality of flexible circuit boards, wherein the plurality of flexible circuit boards may have a curvature substantially equal to the curvature of the edge of the side surface of the second substrate.

[0025] The spacing between adjacent flexible circuit boards in the plurality of flexible circuit boards can be substantially the same.

[0026] The plurality of protrusions can form an array of protrusions having substantially the same curvature.

[0027] According to another aspect of the present invention, a method of manufacturing a display device includes the following steps: preparing a curvature jig; preparing a flat panel display panel; using the curvature jig to bend the flat panel display panel to generate a curved display panel; and attaching a flexible circuit board to the side surface of the curved display panel.

[0028] The curvature clamp may include a first clamp with a concave surface and a second clamp with a convex surface.

[0029] The step of bending the flat panel display may include: placing the flat panel display on the concave surface of the first clamp; pressing the flat panel display using the convex surface of the second clamp; and securing the bent display panel to the curvature clamp.

[0030] The flexible circuit board may include a protrusion disposed in the flexible circuit board, wherein a connecting pad may be disposed on the side surface of the flat panel display panel, and wherein attaching the flexible circuit board to the side surface of the curved display panel may include coupling the protrusion to the connecting pad.

[0031] The protrusion may include a bump coupled to the connecting pad via an adhesive film.

[0032] It will be understood that both the foregoing general description and the following detailed description are exemplary and illustrative, and are intended to provide further explanation of the claimed invention. Attached Figure Description

[0033] The accompanying drawings are included to provide a further understanding of the invention. The drawings are incorporated in and form a part of this specification. The drawings illustrate exemplary embodiments of the invention and, together with the description, serve to explain the inventive concept.

[0034] Figure 1 This is a front elevation view showing an exemplary embodiment of a splicing display device constructed according to the principles of the present invention.

[0035] Figure 2 yes Figure 1 A perspective view of an exemplary embodiment of a splicing display device.

[0036] Figure 3 yes Figure 2 An exploded perspective view of a portion of the display device.

[0037] Figure 4 It is along Figure 2 A cross-sectional view taken from line V-V'.

[0038] Figure 5 This is a perspective view of an exemplary embodiment of a data driver constructed according to the principles of the present invention.

[0039] Figure 6 This is an exploded perspective view illustrating an exemplary embodiment of the coupling between a display panel and a flexible circuit board according to the principles of the present invention.

[0040] Figure 7 This is a perspective view illustrating an exemplary embodiment of the upper bump region constructed according to the principles of the present invention.

[0041] Figure 8 This is an enlarged view showing an exemplary embodiment of a display panel with attached connection pads on the side surface of a display device.

[0042] Figure 9 This is a plan view illustrating an exemplary embodiment of a display device constructed according to the principles of the present invention, showing a region having an attached flexible circuit board.

[0043] Figure 10 yes Figure 9 An enlarged view of one of the areas with attached flexible circuit boards.

[0044] Figure 11 This is a flowchart illustrating an exemplary embodiment of a method for manufacturing a display device according to the principles of the present invention.

[0045] Figures 12 to 14 It is used to show according to Figure 11 The flowchart shows a cross-sectional view of a method for manufacturing a display device.

[0046] Figure 15 This is an enlarged view of another exemplary embodiment of a display panel with an attached flexible circuit board constructed according to the principles of the present invention.

[0047] Figure 16 This is an enlarged view of a further exemplary embodiment of a display panel with an attached flexible circuit board constructed according to the principles of the present invention.

[0048] Figure 17 This is an enlarged view of another exemplary embodiment of a display panel with an attached flexible circuit board constructed according to the principles of the present invention.

[0049] Figure 18 It is shown Figure 17 A plan view of an exemplary embodiment of the upper bump region of the flexible circuit board.

[0050] Figure 19 This is an enlarged view of a region of a display panel having an attached flexible circuit board constructed according to the principles of the present invention. Detailed Implementation

[0051] In the following description, numerous specific details are set forth for illustrative purposes to provide a thorough understanding of various exemplary embodiments or implementations of the invention. As used herein, “embodiment” and “implementation” are interchangeable terms as non-limiting examples of apparatuses or methods employing one or more inventive concepts disclosed herein. However, it will be apparent that various exemplary embodiments may be practiced without these specific details or by one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various exemplary embodiments. Furthermore, the various exemplary embodiments may be different, but are not necessarily exclusive. For example, the specific shape, configuration, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0052] Unless otherwise stated, the exemplary embodiments shown are to be understood as providing exemplary features of different details in which the inventive concept can be implemented in practice. Therefore, unless otherwise stated, features, components, modules, layers, films, panels, regions and / or aspects (hereinafter individually or collectively referred to as “elements”) of various embodiments may be combined, separated, interchanged and / or rearranged in other ways without departing from the inventive concept.

[0053] The use of crosshairs and / or shading in the accompanying drawings is generally provided to clearly define the boundaries between adjacent elements. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, size, scale, commonalities between the elements shown, or any other characteristics, properties, performance, etc., of the elements. Furthermore, the dimensions and relative dimensions of elements may be exaggerated in the drawings for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, the specific process sequence may be performed differently than the order described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Additionally, the same reference numerals denote the same elements.

[0054] When a component or layer is referred to as being "on," "connected to," or "coupled to" another component or layer, the component or layer may be directly on, directly connected to, or directly coupled to the other component or layer, or there may be intermediate components or intermediate layers. However, when a component or layer is referred to as being "directly on," "directly connected to," or "directly coupled to" another component or layer, there are no intermediate components or intermediate layers. Therefore, the term "connection" can refer to a physical connection, electrical connection, and / or fluid connection with or without intermediate components. Furthermore, the DR1, DR2, and DR3 axes are not limited to the three axes of a Cartesian coordinate system such as the x, y, and z axes, and can be interpreted in a broader sense. For example, the DR1, DR2, and DR3 axes can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as XYZ, XYY, YZ, and ZZ. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0055] Although the terms “first,” “second,” etc., may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the teachings of this disclosure, the first element discussed below may be referred to as the second element.

[0056] For descriptive purposes, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in “sidewall”) may be used herein to describe the relationship of one element to another (or multiple elements) as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to cover different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, an element described as “below” or “under” other elements or features would subsequently be oriented “above” other elements or features. Thus, the exemplary term “below” can cover both above and below orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or in other orientations), and thus, the spatial relative descriptive terms used herein shall be interpreted accordingly.

[0057] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising,” “including,” “containing,” and / or “having” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, components, and / or groups thereof, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than terms of degree, and thus, the terms “substantially,” “about,” and other similar terms are used to explain the inherent biases of measured, calculated, and / or provided values ​​that will be recognized by those skilled in the art.

[0058] In this document, various exemplary embodiments are described with reference to cross-sectional views and / or exploded views that are schematic diagrams of idealized exemplary embodiments and / or intermediate structures. Thus, variations in the shapes of the illustrations will be anticipated, for example, due to manufacturing techniques and / or tolerances. Therefore, the exemplary embodiments disclosed herein should not be construed as limited to the shapes of the specifically shown areas, but will include, for example, deviations in shape due to manufacturing processes. In this way, the areas shown in the drawings may be substantially schematic, and the shapes of these areas may not reflect the actual shapes of the areas of the device, and thus, are not necessarily intended to be limiting.

[0059] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Unless expressly defined herein, terms such as those defined in a general dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and should not be interpreted in an idealized or overly formalized sense.

[0060] Figure 1 This is a front elevation view showing an exemplary embodiment of a splicing display device constructed according to the principles of the present invention.

[0061] As used herein, unless otherwise stated, "above" and "top surface" in the thickness direction may refer to the side of the display device 1 on which the image is displayed or the side indicated by the arrow in the third direction DR3, while "below" and "bottom surface" may refer to the opposite side of the display device 1 or the opposite side in the third direction DR3. Furthermore, when viewing the display surface from above, "upper side," "lower side," "left side," and "right side" in the plane may be defined. For example, "left side" may refer to the side opposite to the side indicated by the arrow in the first direction DR1, "right side" may refer to the side indicated by the arrow in the first direction DR1, "upper side" may refer to the side indicated by the arrow in the second direction DR2, and "lower side" may refer to the side opposite to the side indicated by the arrow in the second direction DR2.

[0062] Display device 1 can be a self-emissive display device, such as an organic light-emitting display device, a quantum dot light-emitting display device, a micro LED display device, and a nano LED display device. Alternatively, display device 1 can be a non-self-emissive display device, such as an electrophoretic display device and an electrowetting display device. In the following description, a liquid crystal display device including a liquid crystal layer is used as the display device, but the exemplary embodiments are not limited thereto. For example, display devices other than liquid crystal display devices (e.g., organic light-emitting display devices) can be used, in which case some elements described below can be omitted, or other elements can be added.

[0063] The display device 1 according to some exemplary embodiments can be used in large electronic devices such as televisions and electronic bulletin boards, as well as in small and medium-sized electronic devices such as personal computers, laptop computers, vehicle navigation devices, and cameras. Additionally, the display device can be used in tablet PCs, smartphones, personal digital assistants (PDAs), portable multimedia players (PMPs), gaming devices, wristwatch-type electronic devices, etc. The electronic devices listed above are merely exemplary, and the display device can be used in other display devices such as video wall display devices.

[0064] Reference Figure 1 A tiled display device (TDD) may include multiple display devices 1. In an exemplary embodiment, the multiple display devices 1 may be arranged in a grid pattern, but the exemplary embodiment is not limited thereto. The multiple display devices 1 may be connected in a first direction DR1 or a second direction DR2, or they may be connected in a specific pattern. The multiple display devices 1 may have the same size, but the exemplary embodiment is not limited thereto. The multiple display devices 1 may have different sizes.

[0065] The multiple display devices 1 included in the TDD (Display Device Deployment) can have a generally rectangular shape including long and short sides. The long or short side of each of the multiple display devices 1 can be connected to the long or short side of an adjacent display device 1. Some display devices 1 can form the various sides of the TDD, some other display devices 1 can be positioned at the various corners of the TDD to form two adjacent sides, and the remaining display devices 1 can be positioned inside the TDD and surrounded by other display devices 1.

[0066] Each of the display devices 1 may include a display area DA and a non-display area NDA. The display area DA is the area where an image is displayed. The non-display area NDA is the area where no image is displayed, i.e., the border of the display device 1, and the non-display area NDA may be disposed around the display area DA. The non-display area NDA may surround the display area DA, but the exemplary embodiments are not limited thereto. The display device 1 may have different border shapes depending on its position, or it may have the same border shape.

[0067] The tiled display device (TDD) can have a generally planar shape, but exemplary embodiments are not limited thereto. The tiled display device (TDD) can have a three-dimensional shape to provide a three-dimensional effect. When the tiled display device (TDD) has a three-dimensional shape, each display device 1 included in the tiled display device (TDD) can have a generally curved shape and can be connected to each other in a generally planar shape or at a predetermined angle, such that the tiled display device (TDD) can be formed into a three-dimensional shape. However, it will be understood that exemplary embodiments are not limited thereto. The tiled display device (TDD) can be a generally flat display device.

[0068] The bezels of a plurality of display devices 1 defined as a non-display area NDA can be directly connected to each other. Alternatively, the bezels of a plurality of display devices 1 defined as a non-display area NDA can be connected to each other by connecting members. In this way, since the display devices 1 are connected to each other in a tiled display device TDD, the two bezels of adjacent display devices 1 are arranged together at the connecting portion. Therefore, it is required that each of the display devices 1 has a thin bezel. For this purpose, as described in more detail below, it is considered to connect the connecting pads of the flexible circuit board to the side surface of each of the display devices 1. In the following, exemplary embodiments of the display devices 1 are described in detail, and the exemplary embodiments of the display devices 1 can be used as one display device 1 of a tiled display device TDD, or can be used alone.

[0069] Figure 2 yes Figure 1 A perspective view of an exemplary embodiment of a splicing display device. Figure 3 yes Figure 2 An exploded perspective view of a portion of the display device. Figure 4 It is along Figure 2 A cross-sectional view taken from line V-V'.

[0070] Reference Figures 2 to 4According to some exemplary embodiments, the display device 1 may be a curved display device 1. The curved display device 1 may include a curved display panel DP. According to an exemplary embodiment, the curved display device 1 may be a liquid crystal display device. In this case, the display panel DP may include: a curved first substrate 100; a curved second substrate 200 disposed on the first substrate 100; and a liquid crystal layer disposed between the first substrate 100 and the second substrate 200. According to another exemplary embodiment, the curved display device 1 may be an organic light-emitting display device. In this case, the display panel DP may include: a curved first substrate 100; a curved second substrate 200 disposed on the first substrate 100; and an organic light-emitting layer disposed between the first substrate 100 and the second substrate 200. The second substrate 200 may be an encapsulation substrate or a panel protection member. In the following description, a liquid crystal display device is used as the curved display device 1, but the exemplary embodiments are not limited thereto.

[0071] When viewed from above, the display panel DP can be a roughly rectangular shape with a long side in the first direction DR1 and a short side in the second direction DR2. However, the shape of the display panel DP is not limited to this, and when viewed from above, the shape of the display panel DP may have curved portions in certain areas.

[0072] The display panel DP can have a shape with either a curved long side or a curved short side, but exemplary embodiments are not limited thereto. Both the long and short sides can have curved shapes. Although the display panel DP can have a substantially constant radius of curvature over the entire area, exemplary embodiments are not limited thereto. The display panel DP can have different radii of curvature for different areas. In the following description, a display panel DP with a curved long side is described as an example.

[0073] The first substrate 100 may include a plurality of pixels PX. The plurality of pixels PX may be arranged in a matrix. However, it will be understood that the exemplary embodiments are not limited thereto. A plurality of scan lines SL1 to SLn and a plurality of data lines DL1 to DLm may be provided along the boundaries of the pixels PX, wherein n and m are natural numbers.

[0074] Scan lines SL1 to SLn and data lines DL1 to DLm can be arranged to intersect each other. Scan lines SL1 to SLn and data lines DL1 to DLm can be insulated from each other. Scan lines SL1 to SLn can extend in a first direction DR1 to be electrically connected to the gate driver SGD. Data lines DL1 to DLm can extend in a second direction DR2 and can be connected to the data driver SDD.

[0075] Pixels PX can be set at various intersections between scan lines SL1 to SLn and data lines DL1 to DLm. Each pixel PX can be electrically connected to scan lines SL1 to SLn and data lines DL1 to DLm. Multiple scan lines SL1 to SLn can be used as selection lines for selecting from multiple pixels PX, where n is a natural number.

[0076] Although for the sake of explanation, Figure 3 The illustration depicts only one representative pixel PX, but it will be understood that multiple pixel PXs can actually be provided. Multiple pixel PXs can be arranged in a matrix. However, it will be understood that the exemplary embodiments are not limited thereto. Within each pixel PX, a representative pixel electrode defining the pixel can be provided.

[0077] The timing controller can receive image signals and control signals from external devices. The timing controller can appropriately process the image signals and control signals according to the operating conditions of the display panel (DP), thereby generating image data, a first control signal, and a second control signal. The image signals may include multiple grayscale levels of data to be transmitted to the display panel (DP). Additionally, the control signals may include a horizontal synchronization signal, a vertical synchronization signal, and a master clock signal. The master clock signal can be used as a reference signal when the timing controller is synchronized with each of the gate driver (SGD) and data driver (SDD) used to generate the various signals.

[0078] The gate driver SGD can receive a first control signal from the timing controller. The gate driver SGD can generate scan signals in response to the first control signal and can sequentially output the generated scan signals. The scan signals can be provided to the pixel PX line by line through scan lines SL1 to SLn. Therefore, the pixel PX can be driven line by line.

[0079] The gate driver SGD may be located adjacent to at least one of the short sides of the first substrate 100. However, it will be understood that the exemplary embodiments are not limited thereto. For example, the gate driver SGD may be formed during the process of manufacturing transistors for driving pixels PX, and may be mounted on the first substrate 100 in the form of an amorphous silicon TFT gate driver circuit (ASG) or a silicon oxide TFT gate driver circuit (OSG). However, it will be understood that the exemplary embodiments are not limited thereto. The gate driver SGD may be formed from multiple driver chips, may be mounted on a flexible driver circuit board, and may be mounted on the first substrate 100 using tape-on-clip (TCP) technology. The gate driver SGD may be formed from multiple driver chips and may be mounted on the first substrate 100 using chip-on-glass (COG) technology.

[0080] The data driver SDD can receive a second control signal and image data from the timing controller. The data driver SDD can generate a data signal based on the second control signal and the image data. The data driver SDD can then provide the generated data signal to the pixel PX via data lines DL1 to DLm.

[0081] Data signals can be provided to pixel PX via data lines DL1 to DLm. Pixel PX can receive data signals via data lines DL1 to DLm in response to scan signals provided via scan lines SL1 to SLn. Pixel PX can represent gray levels corresponding to the data signals, allowing control over the transmittance of the area where each pixel PX is located.

[0082] Each data driver SDD may include a flexible circuit board 400 and a source driver chip IC disposed on the flexible circuit board 400. The flexible circuit board 400 may be configured to be adjacent to a side surface of the long side of the display panel DP for connection to the display panel DP. However, it will be understood that the exemplary embodiments are not limited thereto. The position of the display panel DP in which the flexible circuit board 400 is connected can be changed as needed. For example, the flexible circuit board 400 may be configured to be adjacent to one of the short sides of the display panel DP for connection to the display panel DP. Alternatively, the flexible circuit board 400 may be disposed on each of the long sides of the display panel DP. Alternatively, the flexible circuit board 400 may be disposed on each of the short sides of the display panel DP. Alternatively, the flexible circuit board 400 may be disposed on each of the long sides and each of the short sides of the display panel DP. Figure 2 As shown, the spacing between adjacent flexible circuit boards 400 in the plurality of flexible circuit boards 400 is substantially the same.

[0083] The flexible circuit board 400 can be attached to the connection pads 500 of the display panel DP via an adhesive film 600. For example, the upper bump BPU of the flexible circuit board 400 and the display panel DP can be electrically connected via external lead soldering (OLB) using the adhesive film 600. The adhesive film 600 may be configured to cover the entire connection pads 500 of the display panel DP, but the exemplary embodiment is not limited thereto. A portion of the connection pads 500 of the display panel DP may be exposed.

[0084] The first substrate 100 may include a first substrate 110, connecting lines 120, and an insulating layer 130. The connecting lines 120 may be disposed on the first substrate 110. The connecting lines 120 may be electrically connected to scan lines SL1 to SLn and data lines DL1 to DLm.

[0085] An insulating layer 130 may be disposed on the connecting wire 120. The insulating layer 130 may include contact holes exposing the connecting wire 120 near one side of the first substrate 100. The insulating layer 130 may be made of a material comprising an insulating material. In some exemplary embodiments, the insulating material may be an inorganic insulating material or an organic insulating material. Inorganic insulating materials may include at least one selected from alumina, titanium oxide, silicon oxide, silicon oxynitride, zirconium oxide, and hafnium oxide. Organic insulating materials may include at least one selected from the group consisting of acrylic resin, methacrylic resin, polyisoprene, ethylene resin, epoxy resin, polyurethane resin, cellulose resin, siloxane resin, polyimide resin, polyamide resin, and dinaphthalene-containing resin.

[0086] Connection pads 510 may be provided on the contact holes of the insulating layer 130 and on the insulating layer 130 surrounding the contact holes. The connection pads 510 can contact the connecting line 120 through the contact holes of the insulating layer 130. Therefore, the connection pads 510 can be electrically connected to the connecting line 120. However, it should be noted that the construction of the connection pads 510 is not limited to this. For example, the connection pads 510 may only be provided in the contact holes of the insulating layer 130. Alternatively, the connection pads 510 may be integrally formed with the connecting line 120.

[0087] The connecting line 120 can extend inward from the side surface of the first substrate 100 (e.g., in the second direction DR2) and can be electrically connected to multiple pixels PX. The connecting pad 500 can be made of aluminum (Al) or silver (Ag), but is not limited to aluminum (Al) or silver (Ag).

[0088] The source driver chip IC mounted on the flexible circuit board 400 can generate a data voltage for driving the pixel PX electrically connected via connection pad 500. This generated data voltage can be transmitted to data lines DL1 to DLm via connection pads 500 and 510.

[0089] The flexible circuit board 400 may include an upper bump unit (BPU). A source driver chip IC may be electrically connected to the upper bump unit of the flexible circuit board 400. The upper bump unit of the flexible circuit board 400 may be electrically connected to connection pads 500 disposed on the side surfaces of the first substrate 100 and the second substrate 200 via an adhesive film 600.

[0090] Figure 5 This is a perspective view of an exemplary embodiment of a data driver constructed according to the principles of the present invention. Figure 6 This is an exploded perspective view illustrating an exemplary embodiment of the coupling between a display panel and a flexible circuit board according to the principles of the present invention. Figure 7 This is a perspective view illustrating an exemplary embodiment of the upper bump region constructed according to the principles of the present invention. Figure 8This is an enlarged view showing an exemplary embodiment of a display panel with attached connection pads on the side surface of a display device.

[0091] An adhesive film 600 can be disposed between the connecting pad 500 and the flexible circuit board 400. The adhesive film 600 electrically connects the connecting pad 500 to the upper bump area (BPAU) of the flexible circuit board 400. The adhesive film 600 can be configured to completely cover the connecting pad 500 and the upper bump area (BPAU). The adhesive film 600 can have an area substantially equal to or larger than the area of ​​the upper bump area (BPAU) and the connecting pad 500. When viewed from above, the shape of the adhesive film 600 can conform to the shape of the upper bump area (BPAU) and the connecting pad 500.

[0092] The adhesive film 600 may include an anisotropic conductive film (ACF). When the adhesive film 600 is an anisotropic conductive film, it may be conductive only in the area where the connection pads 500 of the display panel DP contact the upper bump BPU of the flexible circuit board 400, thereby electrically connecting the connection pads 500 of the display panel DP to the upper bump BPU of the flexible circuit board 400. According to another exemplary embodiment, the connection pads 500 of the display panel DP may contact and be electrically connected to each other with the upper bump BPU without the adhesive film 600. For example, the connection pads 500 of the display panel DP may be directly connected to the upper bump BPU of the flexible circuit board 400 by methods such as ultrasonic bonding, welding, or laser bonding.

[0093] A color filter and a sealant SL can be disposed between the first substrate 100 and the second substrate 200. The color filter can be used to improve the quality of the image output from the display device 1, and the sealant SL can be disposed outside the color filter along the edge of the first substrate 100 and the edge of the second substrate 200 to prevent leakage of the liquid crystal layer 300 disposed between the first substrate 100 and the second substrate 200.

[0094] A dummy pattern DMP can be positioned adjacent to a connection pad 500 between a first substrate 100 and a second substrate 200. The dummy pattern DMP can be fixed to the second substrate 200 and can have an end facing the first substrate 100. Additionally, the end of the dummy pattern DMP can contact features (or components) located on the first substrate 100. For example, the end of the dummy pattern DMP can contact the connection pad 510 and the insulating layer 130. When viewed from above, the dummy pattern DMP can extend linearly between one side surface of the first substrate 100 and one side surface of the second substrate 200. However, it will be understood that the exemplary embodiments are not limited thereto. The dummy pattern DMP can be positioned in the form of an island aligned with the connection pad 500. Furthermore, the dummy pattern DMP can be positioned on the end side of the connection pad 500 such that the dummy pattern DMP surrounds the edges of the first substrate 100 and the edges of the second substrate 200.

[0095] The space between the first substrate 100 and the second substrate 200, as well as the space between the sealant SL and the bonding pad 500, may be filled with a dummy pattern DMP. The dummy pattern DMP may be made of an insulating material such as an organic insulating material (e.g., resin) and an inorganic insulating material, but is not limited to such an insulating material.

[0096] The second substrate 200 can be disposed on the first substrate 100. Specifically, the second substrate 200 can be spaced apart from the first substrate 100 on the third-direction DR3. The liquid crystal layer 300 can be disposed between the second substrate 200 and the first substrate 100.

[0097] A common electrode for applying an electric field to the liquid crystal layer 300 together with the pixel electrode of the first substrate 100 may be disposed on the second substrate 200, but the exemplary embodiment is not limited thereto. Both the pixel electrode and the common electrode may be disposed on the first substrate 100.

[0098] The second substrate 200 may include a second substrate 220, a black matrix BM, and an outer coating OC. The black matrix BM and the outer coating OC covering the black matrix BM may be disposed on the second substrate 220. When viewed from above, the black matrix BM may be arranged in a generally lattice pattern and may prevent light mixing between adjacent pixels PX and light leakage through the sides of the display device 1. The black matrix BM may be made of an organic material or a chromium-containing metallic material, but is not limited to organic materials or chromium-containing metallic materials. A color filter pattern may also be disposed on the second substrate 220. The color filter pattern may be used to improve the quality of the image output from the display device 1. The outer coating OC may include an insulating material and may provide a generally flat surface above the height difference created by the black matrix BM and the color filter pattern. However, it will be understood that the exemplary embodiments are not limited thereto. The black matrix BM and the color filter pattern may be disposed on the first substrate 100.

[0099] The display device 1 according to some exemplary embodiments may further include a backlight unit BLU. The backlight unit BLU can generate light and can provide the generated light to a display panel DP including a first substrate 100, a second substrate 200, and a liquid crystal layer 300. The display panel DP can use the light received from the backlight unit BLU to generate an image and can provide the image to the outside. The backlight unit BLU may be, for example, an edge-lit backlight unit or a direct-lit backlight unit, but the exemplary embodiments are not limited thereto.

[0100] The display device 1 may further include an optical sheet comprising a polarizer disposed between the backlight unit BLU and the first substrate 100. Such an optical sheet can control the characteristics of the light supplied from the backlight unit BLU, thereby effectively controlling the transmittance of light passing through the display panel DP. Additionally, the display device 1 may also include a housing member for accommodating the display panel DP.

[0101] According to some exemplary embodiments, the display panel DP can be a curved display panel DP with a predetermined curvature. The radius of curvature of the display panel DP can be substantially uniform, but the exemplary embodiments are not limited thereto. The display panel DP can have different radii of curvature for different regions. In the display panel DP, one side surface on the third direction DR3 can be substantially concave, and the other side surface on the third direction DR3 can be substantially convex. The center of curvature COC of the display panel DP can be located at a point on the third direction DR3 spaced apart from the concave surface of the display panel DP. For example, for a display panel DP with a substantially uniform radius of curvature, the center of curvature COC can be a single point. However, for a display panel DP with different radii of curvature for different regions, different centers of curvature COC may exist for different regions depending on the radius of curvature. Although Figure 8A display panel DP with a generally uniform radius of curvature and thus a single-point center of curvature COC is shown as an example, but exemplary embodiments are not limited thereto.

[0102] like Figure 2 and Figure 5 As depicted, the data driver SDD may include a flexible circuit board 400 and a source driver chip IC disposed on the flexible circuit board 400. As described below, the flexible circuit board 400 may include an upper bump region BPAU and a lower bump region BPAB disposed on its surface, and at least one of the upper bump region BPAU and the lower bump region BPAB has a protrusion, which may be in the form of a bump. For example, the protrusion may include bumps extending in different directions. Multiple upper bumps BPU may be disposed in the upper bump region BPAU of the flexible circuit board 400. At least one lower bump may be disposed in the lower bump region BPAB of the flexible circuit board 400.

[0103] The upper bump unit (BPU) can be the portion of the flexible circuit board 400 that connects to the display panel DP. Specifically, the upper bump unit of the flexible circuit board 400 can be attached to the connection pads 500 disposed on the side surface of the display panel DP via an adhesive film 600, and can be electrically connected to the connection pads 500. The source driver chip IC can be electrically connected to the upper bump unit of the flexible circuit board 400. Therefore, the source driver chip IC can be electrically connected to the display panel DP.

[0104] Reference Figure 7 Multiple upper bump units (BPUs) disposed on the flexible circuit board 400 can be arranged with the same curvature as the edge 230 of the side surface of the second substrate 200. For example, the multiple upper bump units (BPUs) can form an array (ARR) of upper bump units along the edge 230 of the side surface of the second substrate 200. For example, the multiple upper bump units (BPUs) can form an array of upper bump units (BPUs) having substantially the same curvature. The length of the array (ARR) of upper bump units (BPUs) in the thickness direction of the second substrate 200 can be substantially constant. The upper bump region (BPAU) can be defined as the region along the array (ARR) of upper bump units from one edge of an upper bump unit disposed at one end of the array (ARR) to the opposite edge of an upper bump unit disposed at the opposite end of the array (ARR).

[0105] The upper bump region BPAU can be surrounded by first side BPAS1 to fourth side BPAS4. First side BPAS1 can be a line connecting the upper edge of the upper bump BPU located on the third direction DR3. Second side BPAS2 can be a line connecting the lower edge of the upper bump BPU located on the third direction DR3. Third side BPAS3 can be the edge of the outermost upper bump BPU located on the opposite side of the first direction DR1. Fourth side BPAS4 can be the edge of the outermost upper bump BPU located on one side of the first direction DR1. Although in Figure 7 In the example shown, the first side BPAS1 to the fourth side BPAS4 are spaced apart from the sides of the upper bump BPU, but this is only illustrative.

[0106] The first side BPAS1 may be spaced substantially equally from the second side BPAS2 throughout the different regions. However, it will be understood that the exemplary embodiments are not limited thereto.

[0107] The upper bump region BPAU can have a curved shape, such that one side (or the first side BPAS1) is recessed downwards on the third direction DR3, and the opposite side (or the second side BPAS2) protrudes downwards on the third direction DR3. The curvature of the first side BPAS1 and the second side BPAS2 of the upper bump region BPAU can be substantially equal to the curvature of the edge 230 of the side surface of the display panel DP to which the flexible circuit board 400 is attached. For example, the curvature of the first side BPAS1 and the second side BPAS2 of the upper bump region BPAU can be substantially equal to the curvature of the edge 230 of the side surface of the first substrate 100. Additionally, the curvature of the first side BPAS1 and the second side BPAS2 of the upper bump region BPAU can be substantially equal to the curvature of the edge 230 of the side surface of the second substrate 200. In other words, the upper bump area BPAU in which the upper bump BPU of the flexible circuit board 400 is provided can be designed in various ways according to the curvature of the edge 230 of the side surface of the display panel DP to which the flexible circuit board 400 is attached.

[0108] Each upper bump unit (BPU) can have a generally rectangular shape and can extend in different directions. The direction in which the upper bump unit extends can be generally upward and inward toward the center of curvature (COC) of the display panel (DP). For example, one edge and another edge of one of the upper bump units on the third direction (DR3) can face the center of curvature (COC) of the display panel (DP).

[0109] The shortest distance from one edge of the upper side of each upper bump BPU on the third-direction DR3 to the upper edge of the second base 200 on the third-direction DR3 can have substantially the same value. For example, as Figure 7 As shown, in an upper bump BPU disposed in an upper bump region BPAU, the shortest distance dc from the upper edge of the upper bump BPU disposed at the center on the third direction DR3 to the upper edge of the second base 200 on the third direction DR3 can be substantially equal to the shortest distance do from the upper edge of the leftmost upper bump BPU on the third direction DR3 to the upper edge of the second base 200 on the third direction DR3.

[0110] Multiple imaginary lines, each passing through each upper bump unit (BPU) disposed in the upper bump region BPAU and extending substantially parallel to the direction in which each upper bump unit extends, may intersect at the center of curvature (COC) of the display panel DP to which each upper bump unit is attached. For example, among the multiple upper bump units disposed in the upper bump region BPAU, an imaginary line ILc passing through the upper bump unit disposed at the center and extending substantially parallel to the direction in which it extends, and an imaginary line ILo passing through the leftmost upper bump unit and extending along the length of the upper bump unit, may intersect at the center of curvature (COC) of the display panel DP to which the upper bump units are attached. Furthermore, the angle defined by the imaginary lines of adjacent bump units (BPUs) may be substantially constant throughout the different regions, wherein the imaginary lines extend in the direction in which each of the respective bump units (BPUs) extends.

[0111] The lower bump region BPAB can have a roughly rectangular shape, but is not limited to a roughly rectangular shape. For example... Figure 2 The lower bump region BPAB, as depicted in the text (see...) Figure 5 The flexible circuit board 400 can be the portion of the flexible circuit board 400 connected to the drive circuit board SPCB. The flexible circuit board 400 can be implemented as a flexible printed circuit board. Specifically, the flexible circuit board 400 can be implemented as a chip-on-film (COF) substrate. Therefore, the data driver SDD can be connected to the first substrate 100, the second substrate 200, and the drive circuit board SPCB via tape-on-package (TCP) technology, and as... Figure 2 As shown, the flexible circuit board 400 can be bent below the rear surface of the drive circuit board SPCB, such that the drive circuit board SPCB can be positioned on the rear surface of the first substrate 100. In this case, the source driver chip IC can be disposed between the second substrate 200 and the flexible circuit board 400, but the exemplary embodiment is not limited thereto. The source driver chip IC can be disposed on the opposite surface of the flexible circuit board 400.

[0112] The source driver IC can be substantially disposed at the center of the flexible circuit board 400. The source driver IC can be disposed between the upper bump region BPAU and the lower bump region BPAB. The source driver IC may include shift registers, latches, digital-to-analog converters, etc. A data driver SDD may include a single source driver IC or multiple source driver ICs. Although in the exemplary embodiments shown in the figures, a single source driver IC is disposed on the flexible circuit board 400 of the data driver SDD, the exemplary embodiments are not limited thereto. Furthermore, although the display device 1 according to some exemplary embodiments includes five data driver SDDs, it will be understood that the number is not limited to five.

[0113] As described above, the connection pads 500 can be disposed on the side surface of the display panel DP. A plurality of connection pads 500 of the display panel DP can be arranged in a row along the side surface of the display panel DP to form a curve, but the exemplary embodiments are not limited thereto. The plurality of connection pads 500 of the display panel DP can be arranged in a matrix. The arrangement of the connection pads 500 arranged in a row can be curved with a curvature substantially the same as the curvature of the edge of the side surface of the display panel DP. For example, the array ARR of connection pads 500 can have a curvature substantially the same as the curvature of the edge of the side surface of the first substrate 100. Additionally, the array ARR of connection pads 500 can have a curvature substantially the same as the curvature of the edge of the side surface of the second substrate 200. However, it will be understood that the exemplary embodiments are not limited thereto.

[0114] like Figure 8 As shown, the connection pad region 500A can be defined by an imaginary line surrounding an array ARR of connection pads 500 arranged in a row. Alternatively, the connection pad region 500A can be defined by an imaginary line surrounding the array ARR of connection pads 500 and spaced apart from the array ARR of connection pads 500 by a predetermined interval.

[0115] The connection pads 500 may have a shape substantially the same as that of the upper bump BPU to which they are connected. For example, each connection pad 500 may have a generally rectangular shape and may extend in different directions. The direction in which the connection pads 500 extend may generally face the center of curvature (COC) of the display panel DP. For example, one edge and another edge of one of the multiple connection pads 500 on the third direction DR3 may face the center of curvature (COC) of the display panel DP.

[0116] Figure 9 This is a plan view illustrating an exemplary embodiment of a display device constructed according to the principles of the present invention, showing a region having an attached flexible circuit board. Figure 10 yes Figure 9An enlarged view of one of the areas with attached flexible circuit boards.

[0117] For ease of explanation, although Figure 9 and Figure 10 A flexible circuit board 400 (specifically, first flexible circuit board 4001 to fifth flexible circuit board 4005) is shown, wherein upper bump regions BPAU (specifically, first upper bump regions BPAU1 to fifth upper bump regions BPAU5) are provided. However, as referred to above... Figure 7 As described, the upper bump PU can be set in each upper bump region BPAU.

[0118] Reference Figure 9 and Figure 10 The first flexible circuit board 4001 to the fifth flexible circuit board 4005 can be arranged sequentially on the side surface of the display panel DP, and can be spaced apart from each other from one side to the other in the first direction DR1. Consistent with the curved display panel DP, the first flexible circuit board 4001 to the fifth flexible circuit board 4005 can be configured such that they can extend generally toward the curvature center COC of the display panel DP.

[0119] Flexible circuit boards 4001 to 4005 located on the side surface of the display panel DP may not protrude above the upper side of the display panel on the third-direction DR3. Specifically, when viewed from above, the upper edge of each of the flexible circuit boards 4001 to 4005 on the third-direction DR3 may be aligned with the upper edge of the display panel DP on the third-direction DR3, or may be disposed inside the display panel DP. In the following description, a display panel DP having five flexible circuit boards 4001 to 4005 attached to the side surface will be described as an example. However, it will be understood that the number of flexible circuit boards 4001 to 4005 attached to the side surface of the display panel DP is not limited to five.

[0120] A first center line IL1 to a fifth center line IL5 can be defined in each of the flexible circuit boards 4001 to 4005. The first center line IL1 to the fifth center line IL5 are imaginary lines that divide each of the flexible circuit boards 4001 to 4005 substantially equally in a side view and penetrate the display panel DP in the thickness direction. The first center line IL1 to the fifth center line IL5 can pass through the same center of curvature COC. However, when the display panel DP has different radii of curvature for different areas in which the first flexible circuit boards 4001 to the fifth flexible circuit boards 4005 are disposed, the first center line IL1 to the fifth center line IL5 can pass through different centers of curvature COC.

[0121] Adjacent angles α12 to α45, defined as the angles between adjacent centerlines from the first centerline IL1 to the fifth centerline IL5, can be substantially equal to each other. For example, adjacent angles α12 formed when the first centerline IL1 intersects the second centerline IL2, α23 formed when the second centerline IL2 intersects the third centerline IL3, α34 formed when the third centerline IL3 intersects the fourth centerline IL4, and α45 formed when the fourth centerline IL4 intersects the fifth centerline IL5 can have the same value. However, it will be understood that the exemplary embodiments are not limited thereto. Adjacent angles α12 to α45 can have different values.

[0122] exist Figure 9 In the side view, the spacing between adjacent flexible circuit boards 4001 to 4005 can be defined as the distance between the points where the first center line IL1 to the fifth center line IL5 overlaps with the respective edges of the flexible circuit boards 4001 to 4005 on the third-direction DR3. The spacing between adjacent flexible circuit boards 4001 to 4005 can be substantially constant. However, it will be understood that the exemplary embodiments are not limited thereto. The spacing distances can be different from each other.

[0123] As described above, flexible circuit boards 4001 to 4005 may each include a first upper bump region BPAU1 to a fifth upper bump region BPAU5. The first upper bump regions BPAU1 to the fifth upper bump regions BPAU5 may each be disposed on the side surface of the flexible circuit boards 4001 to 4005 facing the display panel DP. That is, the first upper bump regions BPAU1 to the fifth upper bump regions BPAU5 may each be disposed on the side surface of the flexible circuit boards 4001 to 4005 in the second direction DR2. Furthermore, in Figure 10 In the side view, the first upper bump region BPAU1 to the fifth upper bump region BPAU5 can overlap with the side surface of the display panel DP in the second direction DR2. Specifically, the first upper bump region BPAU1 to the fifth upper bump region BPAU5 partially overlap with the side surface of the second substrate 200 in the second direction DR2, and partially overlap with the side surface of the first substrate 100 in the second direction DR2.

[0124] Reference Figure 7 and Figure 10The upper bump region BPAU may be surrounded by a first side BPAS1 disposed on the upper side of the third direction DR3, a second side BPAS2 disposed on the lower side of the third direction DR3 opposite to the first side BPAS1, a third side BPAS3 connecting the first side BPAS1 and the second side BPAS2 on the other side of the first direction DR1, and a fourth side BPAS4 connecting the first side BPAS1 and the second side BPAS2 on one side of the first direction DR1. The first side BPAS1 and the second side BPAS2 may be spaced apart from the edges of the side surfaces of the first base 100 and the second base 200 throughout different regions. However, it will be understood that the exemplary embodiments are not limited thereto.

[0125] The shape of the upper bump region BPAU can conform to the shape of the connection pad region 500A disposed on the side surface of the curved display panel DP. The connection pad region 500A can have a curved shape according to the curvature of the area of ​​the display panel DP to which the connection pad 500 is attached. To ensure that the upper bump BPAU overlaps with the connection pad 500, the shape of the upper bump region BPAU can conform to the shape of the connection pad region 500A attached to the upper bump region BPAU. Since the upper bump region BPAU and the connection pad 500 reliably overlap each other, the adhesive force between the flexible circuit board 400 and the display panel DP can be increased, thereby reducing the stress between the flexible circuit board 400 and the display panel DP. Therefore, the flexible circuit board 400 can be effectively attached to the side surface of the display panel DP.

[0126] The tangent to the first side BPAS1 at the point where it intersects the center line IL can be substantially perpendicular to the center line IL. Similarly, the tangent to the second side BPAS2 at the point where it intersects the center line IL can be substantially perpendicular to the center line IL. However, it will be understood that the exemplary embodiments are not limited thereto.

[0127] An imaginary line extending along the third side BPAS3 and an imaginary line extending along the fourth side BPAS4 can extend towards the center of curvature COC of the display panel DP. The imaginary lines extending along the third side BPAS3 and the fourth side BPAS4 can pass through the center of curvature COC of the display panel DP. The imaginary lines extending along the third side BPAS3 and the fourth side BPAS4 can intersect at the center of curvature COC to form the central angle β. The center line IL can divide the central angle β substantially equally.

[0128] The tangent to the second side BPAS2 at the point where it intersects with the third side BPAS3 can be substantially perpendicular to the third side BPAS3. Similarly, the tangent to the second side BPAS2 at the point where it intersects with the fourth side BPAS4 can be substantially perpendicular to the fourth side BPAS4. However, it will be understood that the exemplary embodiments are not limited thereto.

[0129] The upper side 410 of the flexible circuit board 400 (or the upper edge on the third direction DR3) can be substantially equally divided by the center line IL, and may include a first upper side 411 and a second upper side 412. The left side 420 of the flexible circuit board 400 (or the edge on the other side on the first direction DR1) can be bent from the end of the upper side 410 of the flexible circuit board 400 on the other side on the first direction DR1 and extend downward toward the third direction DR3. The right side 430 of the flexible circuit board 400 (or the edge on one side on the first direction DR1) can be bent from the end of the upper side 410 of the flexible circuit board 400 on the one side on the first direction DR1 and extend downward toward the third direction DR3. The left side 420 (or the edge on the other side of the first direction DR1) of the flexible circuit board 400 can be substantially parallel to the right side 430 (or the edge on one side of the first direction DR1) of the flexible circuit board 400. Therefore, the spacing between the left side 420 (or the edge on the other side of the first direction DR1) and the right side 430 (or the edge on one side of the first direction DR1) of the flexible circuit board 400 can be substantially consistent throughout the different regions.

[0130] exist Figure 10 In the side view, the portion of the upper side 210 of the second base 200 (or the upper edge located on the third direction DR3) between the point where the imaginary line extending along the left side 420 of the flexible circuit board 400 (or the other side of the edge located on the first direction DR1) intersects with the upper side 210 and the point where the imaginary line extending along the right side 430 of the flexible circuit board 400 (or the edge located on one side of the first direction DR1) intersects with the upper side 210 is substantially equally divided by the center line IL into a first portion 211 and a second portion 212.

[0131] In a side view, the first region S1 can be defined by an imaginary line extending along the left side 420 of the flexible circuit board 400 (or the edge on the other side in the first direction DR1), the upper side 410 of the flexible circuit board 400 (or the upper edge in the third direction DR3), the center line, and the upper side 210 of the second base 200 (or the upper edge in the third direction DR3). Similarly, the second region S2 can be defined by an imaginary line extending along the right side 430 of the flexible circuit board 400 (or the edge on one side in the first direction DR1), the upper side 410 of the flexible circuit board 400 (or the upper edge in the third direction DR3), the center line, and the upper side 210 of the second base 200 (or the upper edge in the third direction DR3).

[0132] Additionally, in the side view, the area of ​​the side surface of the second substrate 200 positioned between an imaginary line extending along the left side edge 420 of the flexible circuit board 400 and an imaginary line extending along the right side edge 430 of the flexible circuit board 400 may include an overlapping portion that overlaps with the flexible circuit board 400 in the second direction DR2, as well as non-overlapping portions S1 and S2. The non-overlapping portions S1 and S2 may include a first region S1 located on the opposite side of the center line IL in the first direction DR1, and a second region S2 located on one side of the center line IL in the first direction DR1.

[0133] In a side view, on the side surface of the display panel DP between an imaginary line extending along the left side 420 (or the edge on the other side of the first direction DR1) of the flexible circuit board 400 and the center line IL, the first region S1 may not overlap with the flexible circuit board 400 in the second direction DR2. Similarly, in a side view, on the side surface of the display panel DP between an imaginary line extending along the right side 430 (or the edge on one side of the first direction DR1) of the flexible circuit board 400 and the center line IL, the second region S2 may not overlap with the flexible circuit board 400 in the second direction DR2.

[0134] The first region S1 and the second region S2 can be in contact with each other. The first region S1 can be located on the opposite side of the second region S2 in the first direction DR1, and the second region S2 can be located on one side of the first region S1 in the first direction DR1. For example, one side of the first region S1 in the first direction DR1 can form the opposite side of the second region S2 in the first direction DR1, and the opposite side of the second region S2 in the first direction DR1 can form the opposite side of the first region S1 in the first direction DR1. The area of ​​the first region S1 can be substantially equal to the area of ​​the second region S2. The first region S1 and the second region S2 can be substantially symmetrical with respect to the center line IL.

[0135] The upper bump region BPAU and the second base 200 can overlap each other in the second direction DR2. The area where the upper bump region BPAU overlaps with the second base 200 in the second direction DR2 may include a third region S3 disposed on the other side of the center line IL in the first direction DR1 and a fourth region S4 disposed on one side of the center line IL in the first direction DR1.

[0136] The third region S3 and the fourth region S4 can be in contact with each other. The third region S3 can be located on the opposite side of the fourth region S4 in the first direction DR1, and the fourth region S4 can be located on one side of the third region S3 in the first direction DR1. For example, one side of the third region S3 in the first direction DR1 can form the opposite side of the fourth region S4 in the first direction DR1, and the opposite side of the fourth region S4 in the first direction DR1 can form the opposite side of the third region S3 in the first direction DR1. The area of ​​the third region S3 can be substantially equal to the area of ​​the fourth region S4. The third region S3 and the fourth region S4 can be substantially symmetrical with respect to the center line IL. In addition, the shape of the upper bump BPU provided in the upper bump region BPAU can be substantially symmetrical with respect to the center line IL. However, it will be understood that the exemplary embodiments are not limited thereto.

[0137] In the display device 1, the flexible circuit board 400 is attached to the side surface of the curved display panel DP, thereby significantly reducing the bezel size. When one side and the other side of the upper bump region BPAU included in the flexible circuit board 400 on the third direction DR3 are substantially parallel to the edge of the side surface of the curved display panel DP, the curved display panel DP and the flexible circuit board 400 can be reliably attached together.

[0138] According to an exemplary embodiment, the bezel of a curved display device can be significantly reduced.

[0139] Figure 11 This is a flowchart illustrating an exemplary embodiment of a method for manufacturing a display device according to the principles of the present invention. Figures 12 to 14 It is used to show according to Figure 11 The flowchart shows a cross-sectional view of a method for manufacturing a display device.

[0140] Reference Figure 11 A method for manufacturing a display device according to some exemplary embodiments may include: preparing a curvature jig (step S11); preparing a flat panel display panel (step S12); bending the flat panel display panel using the curvature jig (step S13); and attaching a flexible circuit board to the bent display panel (step S14). Although it is expected that... Figure 11 The flowchart describes the method, but step S12 can be performed before step S11 if necessary.

[0141] Reference Figure 11 and Figure 12 In step S11 of preparing the curvature fixture, the curvature fixture may include a first fixture JIG1 and a second fixture JIG2. The first fixture JIG1 may include a generally curved concave surface, and the second fixture JIG2 may include a generally curved convex surface.

[0142] The concave surface of the first clamp JIG1 can be located at the center of the wide main surface of the first clamp JIG1, and a generally flat surface can be located at both ends of the concave surface in the first direction DR1. The concave surface of the first clamp JIG1 can be recessed from the generally flat surface. The first clamp JIG1 can have an integral concave surface, but the exemplary embodiments are not limited thereto. The first clamp JIG1 can have a hole formed in the generally concave surface.

[0143] The generally convex surface of the second clamp JIG2 can be positioned at the center of the wide main surface of the second clamp JIG2, and a generally flat surface can be positioned at both ends of the convex surface in the first direction DR1. The generally convex surface of the second clamp JIG2 can protrude from the flat surface. The second clamp JIG2 can have an integral convex surface, but the exemplary embodiments are not limited thereto. The second clamp JIG2 can have a hole formed in the generally convex surface.

[0144] The generally concave surface of the first clamp JIG1 and the generally convex surface of the second clamp JIG2 may have complementary shapes to engage with each other. The curvature of the generally concave surface of the first clamp JIG1 and the curvature of the generally convex surface of the second clamp JIG2 can be determined in various ways based on the curvature formed by using a curvature clamp.

[0145] It is desirable that the width of the flat panel display (DPF) applied to the curvature fixture can be smaller than the width of the recessed area of ​​the first fixture (JIG1) and the width of the protruding area of ​​the second fixture (JIG2).

[0146] When the generally concave surface of the first clamp JIG1 is placed facing upward on the third direction DR3 and the generally convex surface of the second clamp JIG2 is placed facing downward on the third direction DR3, the generally concave surface of the first clamp JIG1 and the generally convex surface of the second clamp JIG2 can engage with each other.

[0147] Although the first clamp JIG1 includes a generally concave surface and the second clamp JIG2 includes a generally convex surface in the accompanying drawings, this is merely illustrative. The first clamp JIG1 may include a generally convex surface, and the second clamp JIG2 may include a generally concave surface. Although the first clamp JIG1 is positioned below the second clamp JIG2 in the accompanying drawings, this is merely illustrative. The second clamp JIG2 may be positioned below the first clamp JIG1.

[0148] In step S12 of preparing the flat panel display panel, the flat panel display panel DPF may include a first substrate 100F, a second substrate 200F, and a liquid crystal layer and a sealant SLF disposed between the first substrate 100F and the second substrate 200F. The sealant SLF may be disposed along the edges of the first substrate 100F and the second substrate 200F to prevent leakage of the liquid crystal layer disposed between the first substrate 100F and the second substrate 200F. The flat panel display panel DPF may not be curved. When viewed from above, the flat panel display panel DPF may have a generally rectangular shape, but is not limited to a generally rectangular shape. The flat panel display panel DPF may have a generally circular shape or other generally polygonal shapes.

[0149] Flat bonding pads can be provided on the side surface of the flat panel display (DPF). Although Figure 12 The diagram shows a flat panel display panel (DPF) where, for ease of explanation, the flat bonding pad area 500AF is positioned on the side surface; however, as referenced above... Figure 8 As described, flat connection pads can be arranged in each flat connection pad area 500AF.

[0150] Step S13, which involves bending a flat panel display (DPF) using a curvature jig, may include: placing the DPF on a generally concave surface of a first jig (JIG1); pressing the DPF with a second jig (JIG2); and securing the bent DPF to the curvature jig.

[0151] During the process of placing the flat panel display panel DPF on the concave surface of the first fixture JIG1, the flat panel display panel DPF can be substantially supported by substantially flat surfaces located at both ends of the generally concave surface of the first fixture JIG1 in the first direction DR1. Therefore, the flat panel display panel DPF can be spaced apart from the generally concave surface in the third direction DR3.

[0152] Reference Figure 13Pressing the flat panel display panel (DPF) using the second clamp (JIG2) may include pressing the upper surface of the DPF, which is placed on the first clamp (JIG1), downward on a third-direction DR3 using the generally convex surface of the second clamp (JIG2). By pressing the DPF downward using the second clamp (JIG2), the upper surface of the DPF becomes curved, thus creating a curved display panel (DP). In this operation, the edges of the display panel (DP) may be positioned more inwardly than the edges of the generally concave surface of the first clamp (JIG1) and more inwardly than the edges of the generally convex surface of the second clamp (JIG2). However, it will be understood that the exemplary embodiments are not limited thereto.

[0153] The lower surface of the second clamp JIG2 and the upper surface of the first clamp JIG1 may have substantially the same shape. Specifically, the upper surface of the second base 200 may be bent to conform to the lower surface of the second clamp JIG2. The lower surface of the first base 100 may be bent to conform to the upper surface of the first clamp JIG1. However, it will be understood that the exemplary embodiments are not limited thereto. The upper surface of the first clamp JIG1 may be spaced from the lower surface of the second clamp JIG2 by a distance substantially equal to the thickness of the display panel DP.

[0154] When the display panel DP is bent, the array of generally flat connection pads on the side surface of the display panel DP is bent into... Figure 8 The shape of the connection pads 500 shown is illustrated. That is, the flat connection pad region 500AF can be bent into the connection pad region 500A. The shape of each connection pad 500 can be changed, but the exemplary embodiment is not limited thereto. For example, the shape of each connection pad 500 may remain unchanged, but only the arrangement of the connection pads 500 can be changed.

[0155] If the pressure applied to the bent display panel DP using the second clamp JIG2 is removed, the bent display panel DP can be restored to a flat panel display. For this to be done, the curvature clamp must be fixed so that the display panel DP remains bent.

[0156] The fixing member can be used to fix the curvature fixture. The fixing member can fix the first fixture JIG1 and the second fixture JIG2. Specifically, the first fixture JIG1 and the second fixture JIG2 can be fixed such that the distance between the upper surface of the first fixture JIG1 and the lower surface of the second fixture JIG2 is maintained. By doing so, the distance between the upper surface of the first fixture JIG1 and the lower surface of the second fixture JIG2 can be maintained to be substantially equal to the thickness of the display panel DP.

[0157] The fixing member may be configured to span across the first clamp JIG1 and the second clamp JIG2. For example, the fixing member may be configured to span across the side surface of the first clamp JIG1 and the side surface of the second clamp JIG2, or across the lower surface of the first clamp JIG1 and the upper surface of the second clamp JIG2. However, it will be understood that the exemplary embodiments are not limited thereto.

[0158] Reference Figure 6 , Figure 11 and Figure 14 After step S13, which involves bending the flat panel display panel using a curvature fixture, step S14, which involves attaching a flexible circuit board to the bent display panel, can be performed. As described above, the flexible circuit board 400 can be attached to the side surface of the bent display panel DP. By doing so, the flexible circuit board 400 can be electrically connected to the display panel DP.

[0159] Specifically, the flexible circuit board 400 can be attached to the connection pads 500 of the display panel DP via the adhesive film 600. For example, the upper bump (BPU) of the flexible circuit board 400 and the display panel DP can be electrically connected via external lead bonding (OLB) using the adhesive film 600. The adhesive film 600 can be configured to cover the entire connection pads 500 of the display panel DP, but the exemplary embodiment is not limited thereto. A portion of the connection pads 500 of the display panel DP may be exposed.

[0160] According to an exemplary method of manufacturing display device 1, flexible circuit board 400 is attached to the side surface of curved display panel DP to significantly reduce the bezel of display device 1. When one side and the other side of the upper bump region BPAU included in flexible circuit board 400 on the third direction DR3 are substantially parallel to the edge of the side surface of curved display panel DP, curved display panel DP and flexible circuit board 400 can be reliably attached together.

[0161] Figure 15 This is an enlarged view of another exemplary embodiment of a display panel with an attached flexible circuit board constructed according to the principles of the present invention. To avoid redundancy, references to the above are omitted. Figures 1 to 10 Features that are similar to those described.

[0162] Figure 15 Exemplary embodiments and Figure 9 and Figure 10 The difference in the exemplary embodiment is that the shape of the flexible circuit board 400_1 that overlaps with the display panel DP_1 in the second direction DR2 is different.

[0163] The left side 420_1 of the flexible circuit board 400_1 may include: a first left side 421_1, which overlaps with the side surface of the display panel DP_1; and a second left side 422_1, which does not overlap with the side surface of the display panel DP_1. The right side 430_1 of the flexible circuit board 400_1 may include: a first right side 431_1, which overlaps with the side surface of the display panel DP_1; and a second right side 432_1, which does not overlap with the side surface of the display panel DP_1. The first left side 421_1 of the flexible circuit board 400_1 faces the curvature center COC_1 of the display panel DP_1 and may be substantially perpendicular to the upper side 210_1 of the second substrate 200_1. The first right side 431_1 of the flexible circuit board 400_1 faces the curvature center COC_1 of the display panel DP_1 and may be substantially perpendicular to the upper side 210_1 of the second substrate 200_1. The spacing between the first left side 421_1 and the first right side 431_1 of the flexible circuit board 400_1 can be reduced toward the curvature center COC_1 of the second substrate 200_1. However, it will be understood that the exemplary embodiments are not limited thereto.

[0164] Additionally, the upper edge 410_1 of the flexible circuit board 400_1 (or one edge on the third-direction DR3) can have a curved shape. The spacing between the upper edge 410_1 of the flexible circuit board 400_1 and the upper edge 210_1 of the second substrate 200_1 can be substantially constant throughout the different regions. Therefore, the tangent line of the upper edge 410_1 of the flexible circuit board 400_1 at the point where the upper edge 410_1 of the flexible circuit board 400_1 intersects with the first left side edge 421_1 can be substantially perpendicular to the first left side edge 421_1. The tangent line of the upper edge 410_1 of the flexible circuit board 400_1 at the point where the upper edge 410_1 of the flexible circuit board 400_1 intersects with the first right side edge 431_1 can be substantially perpendicular to the first right side edge 431_1.

[0165] In the display device 1_1 according to an exemplary embodiment, the flexible circuit board 400_1 is attached to the side surface of the curved display panel DP_1, thereby significantly reducing the bezel size. When one side and the other side of the upper bump region BPAU_1 included in the flexible circuit board 400_1 on the third direction DR3 are substantially parallel to the edge of the side surface of the curved display panel DP_1, the curved display panel DP_1 and the flexible circuit board 400_1 can be reliably attached together.

[0166] According to an exemplary embodiment, the bezel of a curved display device can be significantly reduced.

[0167] Figure 16This is an enlarged view of a further exemplary embodiment of a display panel with an attached flexible circuit board constructed according to the principles of the present invention.

[0168] Figure 16 Exemplary embodiments and Figure 9 and Figure 10 The main difference of the exemplary embodiment is that the shape of the flexible circuit board 400_2 that overlaps with the display panel DP_2 in the second direction DR2 is different.

[0169] The left side 420_2 of the flexible circuit board 400_2 may include: a first left side 421_2, overlapping with the side surface of the display panel DP_2; and a second left side 422_2, not overlapping with the side surface of the display panel DP_2. The right side 430_2 of the flexible circuit board 400_2 may include: a first right side 431_2, overlapping with the side surface of the display panel DP_2; and a second right side 432_2, not overlapping with the side surface of the display panel DP_2. An imaginary line extending along the first left side 421_2 of the flexible circuit board 400_2 faces the curvature center COC_2 of the display panel DP_2 and may be perpendicular to the upper side 210_2 of the second substrate 200_2. An imaginary line extending along the first right side 431_2 of the flexible circuit board 400_2 faces the curvature center COC_2 of the display panel DP_2 and may be substantially perpendicular to the upper side 210_2 of the second substrate 200_2.

[0170] The upper side 410_2 of the flexible circuit board 400_2 can extend in the first direction DR1 and can be perpendicular to the center line IL_2. Figure 16 Exemplary embodiments and Figure 15 The difference in the exemplary embodiment is that the upper side 410_2 of the flexible circuit board 400_2 is a straight line rather than a curve.

[0171] In the display device according to an exemplary embodiment, the flexible circuit board 400_2 is attached to the side surface of the curved display panel DP_2, thereby significantly reducing the bezel size. The curved display panel DP_2 and the flexible circuit board 400_2 can be reliably attached together when one side and the other side of the upper bump region BPAU_2 included in the flexible circuit board 400_2 on the third-direction DR3 are substantially parallel to the edge of the side surface of the curved display panel DP_2.

[0172] According to an exemplary embodiment, the bezel of a curved display device can be significantly reduced.

[0173] Figure 17 This is an enlarged view of another exemplary embodiment of a display panel with an attached flexible circuit board constructed according to the principles of the present invention. Figure 18 It is shown Figure 17 A plan view of an exemplary embodiment of the upper bump region of the flexible circuit board.

[0174] Figure 17 and Figure 18 Exemplary embodiments and Figure 7 and Figure 10 The difference in the exemplary embodiment is that the shape of the upper bump region BPAU_3 that overlaps with the display panel DP_3 on the second direction DR2 is different.

[0175] Multiple upper bumps BPU_3 disposed on the flexible circuit board 400_3 can be arranged with the same curvature as the side edge of the second substrate 200_3. The length of the array ARR_3 of upper bumps BPU_3 in the thickness direction of the second substrate 200_3 can be constant. The upper bump region BPAU_3 can be defined as the region along the array ARR_3 of upper bumps BPU_3 from one edge of the upper bump BPU_3 disposed at one end of the array ARR_3 to the opposite edge of the upper bumps BPU_3 disposed at the opposite end.

[0176] The upper bump region BPAU_3 can be surrounded by a first side BPAS1_3 located on the upper side of the third direction DR3, a second side BPAS2_3 located on the lower side of the third direction DR3 opposite to the first side BPAS1_3, a third side BPAS3_3 located on the other side of the first direction DR1 connecting the first side BPAS1_3 and the second side BPAS2_3, and a fourth side BPAS4_3 located on one side of the first direction DR1 connecting the first side BPAS1_3 and the second side BPAS2_3. The spacing between the first side BPAS1_3 and the second side BPAS2_3 can be substantially consistent throughout the different regions. The first side BPAS1_3 can be a line connecting the upper bump BPU_3 to the upper edge located on the third direction DR3. The second side BPAS2_3 can be a line connecting the upper bump BPU_3 to the lower edge located on the third direction DR3. The third side BPAS3_3 can be the edge of the outermost upper bump BPU_3 located on the other side of the first direction DR1. The fourth side BPAS4_3 can be the edge of the outermost upper protrusion BPU_3 on one side set in the first direction DR1. Although in Figure 18 In the example shown, the first side BPAS1_3 to the fourth side BPAS4_3 are spaced apart from the sides of the upper bump BPU_3, but this is only illustrative.

[0177] The first side edge BPAS1_3 and the second side edge BPAS2_3 may be curves that are generally parallel to the display panel DP_3. For example, the first side edge BPAS1_3 and the second side edge BPAS2_3 may be equally spaced from the edges of the side surfaces of each of the first substrate 100_3 and the second substrate 200_3. The length of the first side edge BPAS1_3 may be substantially equal to the length of the second side edge BPAS2_3. However, it will be understood that the exemplary embodiments are not limited thereto.

[0178] According to some exemplary embodiments, each of the upper bumps BPU_3 may have a generally rectangular shape and may extend in the same direction. Additionally, one edge and another edge of the upper bumps BPU_3 included in a column of upper bumps BPU_3 may be aligned side-by-side on a third-party DR3. However, it will be understood that the exemplary embodiments are not limited thereto.

[0179] The tangent of the first side BPAS1_3 at the point where it intersects the center line IL_3 in the upper bump region BPAU_3 can be substantially perpendicular to the center line IL_3. Similarly, the tangent of the second side BPAS2_3 at the point where it intersects the center line IL_3 can be substantially perpendicular to the center line IL_3. However, it will be understood that the exemplary embodiments are not limited thereto.

[0180] The third side BPAS3_3 of the upper bump region BPAU_3 may be substantially parallel to each of the left side 420_3 and the right side 430_3 of the flexible circuit board 400_3. Additionally, the fourth side BPAS4_3 of the upper bump region BPAU_3 may be substantially parallel to each of the left side 420_3 and the right side 430_3 of the flexible circuit board 400_3. However, it will be understood that the exemplary embodiments are not limited thereto.

[0181] In the display device according to an exemplary embodiment, the flexible circuit board 400_3 is attached to the side surface of the curved display panel DP_3, thereby significantly reducing the bezel size. The curved display panel DP_3 and the flexible circuit board 400_3 can be reliably attached together when one side and the other side of the upper bump region BPAU_3 included in the flexible circuit board 400_3 on the third-direction DR3 are substantially parallel to the edge of the side surface of the curved display panel DP_3.

[0182] According to an exemplary embodiment, the bezel of a curved display device can be significantly reduced.

[0183] Figure 19 This is an enlarged view of a region of a display panel having an attached flexible circuit board constructed according to the principles of the present invention.

[0184] Figure 19 Exemplary embodiments and Figure 7 and Figure 10 The difference in the exemplary embodiment is that the shapes of the upper bump region BPAU_4 and the flexible circuit board 400_4 that overlap with the display panel DP_4 on the second direction DR2 are different.

[0185] The shape of the upper bump region BPAU_4 according to the exemplary embodiment is consistent with the above reference. Figure 17 The upper bump region BPAU_3 described has the same shape. The upper side edge 410_4 of the flexible circuit board 400_4 (or the upper edge located on the third direction DR3) and the upper side edge 210_4 of the second substrate 200_4 (or the upper edge located on the third direction DR3) are arranged side by side.

[0186] Additionally, the upper side 410_4 of the flexible circuit board 400_4 (or the upper edge located on the third direction DR3) can be substantially parallel to the first side BPAS1_4 and the second side BPAS2_4 of the upper bump region BPAU_4.

[0187] In the display device according to an exemplary embodiment, the flexible circuit board 400_4 is attached to the side surface of the curved display panel DP_4, thereby significantly reducing the bezel size. The curved display panel DP_4 and the flexible circuit board 400_4 can be reliably attached together when one side and the other side of the upper bump region BPAU_4 included in the flexible circuit board 400_4 on the third direction DR3 are substantially parallel to the edge of the side surface of the curved display panel DP_4.

[0188] According to an exemplary embodiment, the bezel of a curved display device can be significantly reduced.

[0189] Although specific exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Therefore, the inventive concept is not limited to these embodiments, but is limited to the broader scope of the appended claims and various obvious modifications and equivalent arrangements, as will be apparent to those skilled in the art.

Claims

1. A display device, wherein, The display device includes: The first base is curved; The second substrate is opposite to the first substrate; Multiple connection pads are disposed on the side surfaces of the first substrate and the second substrate; and At least one flexible circuit board includes a plurality of protrusions respectively coupled to the plurality of connection pads. The plurality of protrusions form an array of protrusions along the edge of the side surface of the second base. The at least one flexible circuit board further includes: a protrusion region defined as a region along the array of protrusions from the edge of a protrusion disposed at one end of the array of protrusions to the edge of a protrusion disposed at the other end of the array of protrusions. The protruding region partially overlaps with the side surface of the second substrate. The overlapping area includes a first region located on one side of the imaginary center line and a second region located on the other side of the imaginary center line, wherein the imaginary center line equally divides the flexible circuit board and extends along the length of the flexible circuit board. Wherein, the first region is equal to the second region.

2. The display device according to claim 1, wherein, The protrusion includes bumps extending in different directions.

3. The display device according to claim 2, wherein, The angle defined by the imaginary lines of adjacent bumps in the bumps is constant throughout the different regions, wherein the imaginary lines extend in the direction in which each of the bumps extends.

4. The display device according to claim 1, wherein, The first region and the second region have shapes that are symmetrical with respect to the imaginary center line.

5. The display device according to claim 1, wherein, The protruding region includes a bump region, and the protrusion includes bumps arranged symmetrically with respect to the imaginary center line in the array of bumps.

6. The display device according to claim 1, wherein, The distance between the outer edge of the protrusion located at one end of the array of protrusions and the outer edge of the protrusion located at the other end of the array of protrusions decreases toward the center of curvature of the second base.

7. The display device according to claim 1, wherein, The spacing between the outer edge of the protrusion located at one end of the array of protrusions and the outer edge of the protrusion located at the other end of the array of protrusions is consistent throughout the different regions.

8. The display device according to claim 1, wherein, The display device further includes an adhesive film disposed between the protrusion and the connecting pad.

9. The display device according to claim 8, wherein, The adhesive film is configured to cover the entire connection pad.

10. The display device according to claim 1, wherein, The array of protrusions has a constant length over the thickness of the second substrate.

11. The display device according to claim 1, wherein, The spacing between one edge and the other edge of the flexible circuit board in the direction of the array of protrusions is consistent throughout the different areas.

12. The display device according to claim 1, wherein, In the region where the second substrate overlaps with the flexible circuit board, the spacing between the edges of the flexible circuit board in the direction of the array of protrusions decreases toward the center of curvature of the second substrate.

13. The display device according to claim 1, wherein, The at least one flexible circuit board includes multiple flexible circuit boards, and The plurality of flexible circuit boards have a curvature equal to the curvature of the edge of the side surface of the second substrate.

14. The display device according to claim 13, wherein, The spacing between adjacent flexible circuit boards in the plurality of flexible circuit boards is consistent.

15. The display device according to claim 1, wherein, The plurality of protrusions form an array of protrusions having the same curvature.

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