Display device

Abstract

The present disclosure relates to a display device including spline regions in respective corners. To achieve this, a display device of the present disclosure may have a support substrate coupled to a display panel and having four spline regions respectively corresponding to four arc-shaped corners of the display panel, and the spline regions may have corresponding hole patterns formed therein. Thus, during bonding of the support substrate and the display panel, the hole patterns formed in the corresponding spline regions of the support substrate may absorb bonding pressure, thereby preventing wrinkles or displacement from occurring in the support substrate.

Description

Technical Field

[0001] This disclosure relates to display devices. Background Technology

[0002] Generally speaking, display devices can be divided into organic light-emitting display (OLED) devices, which have self-emissive properties, and liquid crystal display (LCD) devices, which require a separate light source.

[0003] In recent years, display devices that incorporate light-emitting diodes (LEDs) (hereinafter referred to as "light-emitting elements") have attracted attention as the next generation of display devices. Each light-emitting element can be disposed in the effective area (AA) of the display panel.

[0004] As an example, the display panel may be attached with a cover member to protect multiple light-emitting elements. The cover member may be configured to cover the front surface of the display panel and to protect the display panel from external impacts.

[0005] In addition, the display device may have a support substrate attached to the underside of the display panel to enhance the rigidity of the display panel.

[0006] The descriptions provided in the Background section should not be considered prior art simply because they are mentioned or related to it. The Background section may contain information describing one or more aspects of the subject matter art. Summary of the Invention

[0007] However, the problem is that when the support substrate is attached to the display panel, pressure is applied to each corner of the substrate, causing wrinkles or displacement.

[0008] To address the aforementioned drawbacks, the inventors of this invention have developed a display device that can reduce or prevent wrinkles or displacement in the support substrate when it is attached to the display panel.

[0009] The objective of the exemplary embodiments of this disclosure is to provide a display device in which pressure can be absorbed by a hole pattern formed in a corresponding corner of the support substrate during the combination of a display panel and a support substrate.

[0010] In addition to the purposes described above, this disclosure may also have other purposes, which will become apparent to those skilled in the art from the following description.

[0011] Furthermore, it will be readily understood that the objectives and advantages of this disclosure can be achieved by means of the claims and combinations thereof.

[0012] A display device according to an exemplary embodiment of the present disclosure may include: a display panel including four corners each having an arcuate shape; a cover member disposed on the upper side of the display panel; and a support substrate disposed on the lower side of the display panel, wherein the support substrate may have four spline regions corresponding to the four arcuate corners of the display panel, each spline region having a corresponding hole pattern formed therein.

[0013] According to an exemplary embodiment of this disclosure, a support substrate having a hole pattern formed in a corresponding corner can be attached to a display panel.

[0014] According to an exemplary embodiment of this disclosure, during the bonding of the support substrate and the display panel, the hole pattern formed in the corresponding spline region of the support substrate can absorb pressure, thereby reducing or preventing wrinkles or displacement in the support substrate.

[0015] According to exemplary embodiments of this disclosure, by reducing or preventing wrinkles or displacement in the support substrate when the support substrate is bonded to the display panel, the effect of reducing or preventing defects in the display device can be achieved.

[0016] According to exemplary embodiments of this disclosure, the effect of achieving a narrow bezel can be achieved by reducing or preventing product defects.

[0017] According to exemplary embodiments of this disclosure, the effect of reducing product power consumption can be achieved by reducing or preventing product defects associated with wrinkles or displacements in the support substrate, which can affect the operation of the display panel and thus further increase power consumption.

[0018] According to exemplary embodiments of this disclosure, the lifespan of a display device can be reduced or prevented by lowering the power consumption of the product.

[0019] According to exemplary embodiments of this disclosure, by reducing the power consumption of the product and reducing or preventing the shortening of the product's lifespan, it is possible to provide a display device with a long lifespan and low power consumption.

[0020] According to the exemplary embodiments of this disclosure, the power consumption of the product can be reduced, thereby slowing down the reduction of the lifespan of the display panel and improving the quality of the display device.

[0021] Furthermore, the display device according to this disclosure ensures improved quality and high product reliability by combining the display panel and the support substrate without defects.

[0022] In addition to the effects described above, this disclosure may also have other effects that will be readily apparent to those skilled in the art from the following description.

[0023] In addition to the effects described above, the specific effects of the invention will now be described together with the specific details for practicing this disclosure.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory, and are intended to provide further explanation of the claimed inventive concept. Attached Figure Description

[0025] The accompanying drawings are included to provide a further understanding of this disclosure and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the disclosure and, together with the description, serve to explain the principles of the disclosure. In the drawings:

[0026] Figure 1 This is a view showing an apparatus to which a display device according to an exemplary embodiment of the present disclosure is applied.

[0027] Figure 2 This is an exploded perspective view of a display device according to an exemplary embodiment of the present disclosure.

[0028] Figure 3 This is a view showing the spline region of a support substrate according to an exemplary embodiment of the present disclosure.

[0029] Figure 4 This is a view illustrating an example of applying pressure to a spline region according to an exemplary embodiment of the present disclosure.

[0030] Figure 5 This is a view showing the configuration of a hole pattern formed in a support substrate according to an exemplary embodiment of the present disclosure.

[0031] Figure 6 It is along Figure 5 The cross-sectional view taken by line A-A' in the diagram.

[0032] Figure 7 This is a diagram illustrating the interaction between elements when pressure is generated on a support substrate according to an exemplary embodiment of the present disclosure.

[0033] Figure 8 This is a view showing a hole pattern formed in an effective area and an ineffective area of ​​a support substrate according to an exemplary embodiment of the present disclosure.

[0034] Figure 9 This is a view showing the cross-sectional structure of a support substrate according to an exemplary embodiment of the present disclosure.

[0035] Figure 10 This is a view showing a hole pattern formed in a first stripe region of a support substrate according to an exemplary embodiment of the present disclosure.

[0036] Figure 11This is a view showing a hole pattern formed in a second spline region of a support substrate according to an exemplary embodiment of the present disclosure.

[0037] Figure 12 This is a view showing a hole pattern formed in a fourth spline region of a support substrate according to an exemplary embodiment of the present disclosure.

[0038] In all accompanying drawings and detailed descriptions, unless otherwise stated, the same reference numerals should be understood to refer to the same elements, features, and structures. For clarity, illustrative purposes, the relative dimensions and depictions of these elements may be exaggerated.

[0039] Explanation of reference numerals in the attached figures

[0040] 1000: Display device; 100: Display panel

[0041] 110: Substrate; 145: Supporting substrate

[0042] 155: Cover component; 157: Flexible printed circuit board

[0043] 160: Printed circuit board; 293: Polarizing layer

[0044] 295: Adhesive layer; 1005: Shell portion

[0045] AA: Valid region; NA: Invalid region

[0046] SPA1~SPA4: Spline area; BZ: Border area

[0047] BA: Curved area; PT: Hole pattern

[0048] SUS: Stainless Steel; FA: Flat Area

[0049] PSA: Pressure-sensitive adhesive Detailed Implementation

[0050] Descriptions of embodiments of this disclosure will now be given in detail, examples of which are illustrated in the accompanying drawings. In the following description, detailed descriptions of well-known functions or configurations relevant to this document will be omitted where deemed unnecessary to obscure the essential points of the inventive concept. The sequence of the processing steps and / or operations is merely illustrative; however, the order of steps and / or operations is not limited to the order described herein and can be modified as is known in the art, except for steps and / or operations that must be performed in a specific order. The names of the various elements used in the following description may have been chosen solely for convenience of writing the specification and may therefore differ from the names used in actual products.

[0051] The advantages and features of this disclosure, as well as the methods for achieving these advantages and features, will become apparent from reference to the embodiments described in detail below and the accompanying drawings. However, this disclosure is not limited to the embodiments disclosed below, but can be implemented in various different forms. Therefore, these embodiments are set forth only to complete this disclosure and to fully inform those skilled in the art of the subject of this disclosure of its scope. Furthermore, this disclosure is limited only by the scope of the claims.

[0052] The shapes (e.g., dimensions, lengths, widths, heights, thicknesses, positions, radii, diameters, and areas), ratios, angles, quantities, etc., disclosed in the accompanying drawings to illustrate embodiments of the present disclosure are illustrative, and the present disclosure is not limited thereto. Throughout the detailed description, the same reference numerals refer to the same components. Additionally, in describing the present disclosure, detailed descriptions of related known technologies will be omitted if it is determined that such detailed descriptions would unnecessarily obscure the essential points of the present disclosure. When terms such as “comprising,” “including,” “having,” “consisting of,” etc., as used herein, any other part may be added unless the term “only” is used. When a component is described using a singular form, it may include the meaning of the plural form unless explicitly stated otherwise.

[0053] It is important to note that any component will be interpreted as including tolerances or error ranges, even if not explicitly described. Any implementation described as an "example" in this document is not necessarily to be construed as preferred or advantageous over other implementations.

[0054] When describing the positional relationship between two elements, for example, when using terms such as "above", "on top", "on the upper side", "below", "below", "next to", "adjacent", "adjacent", "beside", etc. to describe the positional relationship, one or more other elements may be inserted between the two elements unless the terms "just", "directly", or "immediately next" are used.

[0055] When describing temporal relationships, such as when describing chronological order as “after,” “following,” “next,” “before,” etc., discontinuous cases may also be included unless the terms “exactly” or “directly” are used.

[0056] This article may use terms such as “below,” “lower,” “above,” and “upper” to describe the relationships between the objects shown in the figure. It should be understood that these terms are spatially relative and based on the orientation depicted in the figure.

[0057] It should be understood that although terms such as "first" and "second" may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. Therefore, without departing from the scope of the technical concept of this disclosure, the first element mentioned in the following description may refer to the second element.

[0058] In describing components, this document may use terms such as first, second, A, B, (a), or (b). These terms are used only to distinguish one component from another and do not limit the nature, order, sequence, or number of components.

[0059] When a component is described as being “connected to,” “joined to,” “linked to,” “approaching,” or “attached to” another component, such component may be directly connected to, joined to, contact with, or attached to the other component. However, it should be understood that they may be indirectly connected to, joined to, linked to, approaching, or attached to each other through another component inserted between them, unless explicitly stated otherwise.

[0060] When a component or layer is described as "in contact" or "overlapping" with another component or layer, such component or layer may be in direct contact or overlap with the other component or layer. However, it should be understood that they may also be in direct contact or overlap with each other indirectly through another component or layer inserted between them, unless explicitly stated otherwise.

[0061] The phrase "at least one" should be understood to include any combination of one or more of the relevant components. For example, "at least one of the first, second, and third components" can mean not only the first, second, or third component, but also any combination of two or more of the first, second, and third components.

[0062] The terms “first direction”, “second direction”, “third direction”, “X-axis direction”, “Y-axis direction” and “Z-axis direction” should not be understood as merely geometric relationships in which they are perpendicular to each other, but can represent a broader directionality within the scope of the configurations that this disclosure is capable of functioning.

[0063] The various features of the various embodiments of this disclosure can be partially or wholly linked or combined with each other to interconnect and operate in various technical ways, and each embodiment can be implemented independently of each other or together in an associated relationship.

[0064] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the exemplary embodiments pertain. It should also be understood that terms as defined in common dictionaries shall be interpreted as having a meaning consistent, for example, with their meaning in the relevant artistic context, and shall not be interpreted in an idealized or overly formal sense unless expressly defined herein. For example, as those skilled in the art will understand, the terms “component” or “unit” may be applied to, for example, a single circuit or structure, an integrated circuit, a computational block of a circuit arrangement, or any structure configured to perform the described functions.

[0065] Various exemplary embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0066] Figure 1 A view of an apparatus to illustrate a display device applied according to various embodiments of the present disclosure. Figure 2 This is an exploded perspective view of a display device according to an exemplary embodiment of the present disclosure. Figure 3 A view showing the spline areas of a support substrate according to an exemplary embodiment of the present disclosure.

[0067] The display device 1000 according to an exemplary embodiment of the present disclosure may be included in various devices or electronic devices.

[0068] Reference Figure 1 As an example, the display device 1000 according to an exemplary embodiment of the present disclosure can be applied, for example, to wearable devices such as smartwatches or watch phones.

[0069] In a display device 1000 according to an exemplary embodiment of the present disclosure, a display panel 100 may be mounted to a housing portion 1005. Embodiments of the present disclosure are not limited thereto.

[0070] Various examples of devices or electronic devices that include the display device 1000 according to exemplary embodiments of the present disclosure may include mobile devices, laptop computers, and monitors or TVs, but embodiments of the present disclosure are not limited thereto.

[0071] Wearable devices, mobile devices, laptop computers, and monitors or TVs may include, but are not limited to, the housing portion 1005, display panel 100, or display device 1000 according to exemplary embodiments of the present disclosure.

[0072] For example, the display device according to the exemplary embodiments of this disclosure can be applied to mobile devices, video phones, smartwatches, watch phones, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, curved devices, sliding devices, variable devices, electronic notebooks, e-books, portable multimedia players (PMPs), personal digital assistants (PDAs), MP3 players, mobile medical devices, desktop PCs, laptop PCs, netbooks, workstations, navigation systems, vehicle display devices, cinema display devices, televisions, wallpaper devices, signage devices, gaming devices, laptops, monitors, cameras, camcorders, home appliances, etc.

[0073] Reference Figures 1 to 3 The display device 1000 according to an exemplary embodiment of the present disclosure may include a display panel 100, a polarizing layer 293, an adhesive layer 295, a cover member 155, a support substrate 145, a flexible circuit board 157, and a printed circuit board 160. The embodiments are not limited thereto. As an example, one or more of the above components may be omitted, or one or more additional components may be included.

[0074] For example, the display device 1000 may include a substrate 110. The substrate 110 may be a component supporting other components of the display device 1000. The substrate 110 may be configured with an insulating material. For example, the substrate 110 may be configured with glass or resin, but is not limited thereto. As an example, the substrate 110 may be configured with a flexible material or a rigid material. For example, the substrate 110 may be configured with a flexible plastic material such as polyimide (PI), polyethylene terephthalate (PET), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), polymethyl methacrylate (PMMA), etc. However, embodiments of this disclosure are not limited thereto.

[0075] The display panel 100 can display information, video, and / or images to be provided to the user. For example, the display panel 100 may include an active area AA and an inactive area NA. For example, the substrate 110 may include an active area AA and an inactive area NA. The description of the active area AA and the inactive area NA is not limited to the substrate 110, but can be applied to the entire display device 1000.

[0076] The effective area AA can be an area for displaying an image. The effective area AA can include multiple pixels. Each of the multiple pixels can be composed of multiple sub-pixels. Multiple light-emitting elements can be disposed in each of the multiple sub-pixels. The multiple light-emitting elements can be configured differently depending on the type of display device 1000. For example, in the case of an inorganic light-emitting display device, the light-emitting elements can be LEDs (light-emitting diodes), Micro LEDs (micro light-emitting diodes), or Mini LEDs (miniature light-emitting diodes), but the embodiments of this disclosure are not limited to these.

[0077] The inactive area NA can be an area where no image is displayed. As an example, the inactive area NA can extend from the active area AA. As an example, the inactive area NA can completely or partially surround the active area AA, but is not limited thereto. As an example, at least a portion or all of the inactive area NA can be invisible from the front of the display panel 100, for example, by bending towards the back of the display panel 100, but is not limited thereto. Various wiring and circuitry for driving multiple pixels in the active area AA can be provided in the inactive area NA. For example, a pad portion PAD can be provided in the inactive area NA, on which various wiring and driving circuits can be mounted, and integrated circuits and printed circuits are connected to the pad portion PAD, but embodiments of this disclosure are not limited thereto.

[0078] For example, the driving circuit may be a data driving circuit and / or a gating driving circuit, but embodiments of this disclosure are not limited thereto. In the inactive region NA, wiring may be provided to supply control signals for controlling the driving circuit. For example, the control signals may include various timing signals, including synchronization signals, input data enable signals, and clock signals, but embodiments of this disclosure are not limited thereto. The control signals may be received via pad portions PADs. For example, in the inactive region NA, link wiring for transmitting signals may be provided. For example, driving components such as flexible circuit board 157 and printed circuit board 160 may be connected to the pad portions PADs.

[0079] According to an exemplary embodiment of this disclosure, the ineffective region NA may include a first ineffective region NA1, a curved region BA, and a second ineffective region NA2. For example, the first ineffective region NA1 may be a region surrounding at least a portion of the effective region AA. The curved region BA may be a flexible region extending from at least one of the plurality of sides of the first ineffective region NA1. The second ineffective region NA2 may be a region extending from the curved region BA, and the pad portion PAD may be disposed in this region. For example, the curved region BA may be in a curved state, while the remaining regions of the substrate 110 other than the curved region BA may be in a flat state, but are not limited thereto. In this case, because the curved region BA is curved, the second ineffective region NA2 may be located on the rear surface of the effective region AA. However, embodiments of this disclosure are not limited thereto.

[0080] The effective area AA of the substrate 110 or the display device 1000 can be configured in various shapes according to the design of the display device 1000. For example, the effective area AA can be configured as a rectangle with four rounded corners, but the embodiments of this disclosure are not limited to this. As another example, the effective area AA can be configured as a rectangle with four right angles, a circle, etc., but the embodiments of this disclosure are not limited to this.

[0081] According to an exemplary embodiment of this disclosure, the width of the second ineffective region NA2, which has multiple pad electrodes, can be greater than the width of the curved region BA, which has only multiple connecting wires. Similarly, the width of the effective region AA, which has multiple sub-pixels, can be greater than the width of the curved region BA, which has only multiple connecting wires. Although the width of the curved region BA shown in the figures is smaller than the width of other regions of the substrate 110, the shape of the substrate 110 including such a curved region BA is given only as an example, and the embodiments of this disclosure are not limited thereto. As an example, the widths of the second ineffective region NA2, which has multiple pad electrodes, the curved region BA, which has only multiple connecting wires, and the effective region AA, which has multiple sub-pixels, can be the same as or different from each other, but are not limited thereto.

[0082] Although not shown in the figure, multiple pixel driving circuits can be arranged in the effective area AA. These multiple pixel driving circuits can be circuits for driving light-emitting elements of multiple sub-pixels. Each of the multiple pixel driving circuits may include multiple transistors, including driving transistors, storage capacitors, etc., and can control the light-emitting operation of the multiple light-emitting elements by supplying control signals, power, and driving current to the light-emitting elements of the multiple sub-pixels. For example, the pixel driving circuit may include power wiring and signal wiring for controlling the on / off and / or light-emitting time of the light-emitting elements. For example, the multiple pixel driving circuits may be drive drivers fabricated on a semiconductor substrate using MOSFET (Metal-Oxide-Silicon Field-Effect Transistor) manufacturing processes, but embodiments of this disclosure are not limited thereto. The drive driver may include multiple pixel driving circuits and can drive multiple sub-pixels.

[0083] Simultaneously refer to Figure 2 and Figure 3 The flexible circuit board 157 and the printed circuit board 160 may be disposed on the underside of the display panel 100. The flexible circuit board 157 and the printed circuit board 160 may be disposed on at least one edge of the display panel 100, but embodiments of this disclosure are not limited thereto. The flexible circuit board 157 may be attached to the display panel 100 on one side and to the printed circuit board 160 on the other side, but embodiments of this disclosure are not limited thereto. The flexible circuit board 157 may be configured with a flexible film, but embodiments of this disclosure are not limited thereto.

[0084] In the second inactive area NA2, a pad portion PAD containing multiple pad electrodes can be provided. A driving assembly including one or more flexible circuit boards (or flexible films) 157 and printed circuit boards 160 can be attached or combined to the pad portion PAD. The multiple pad electrodes of the pad portion PAD can be electrically connected to one or more flexible circuit boards (or flexible films) 157 to transmit various signals (or power) from the printed circuit boards 160 and the flexible circuit boards (or flexible films) 157 to multiple pixel driving circuits in the active area AA.

[0085] The flexible circuit board (or flexible film) 157 can be configured with a base film having flexibility and is provided with various components disposed thereon. For example, the flexible circuit board (or flexible film) 157 may be provided with a driver IC disposed thereon, such as a gating driver IC or a data driver IC, but embodiments of this disclosure are not limited thereto. The driver IC can be a component that processes data and drive signals for displaying images. Depending on the mounting method, the driver IC can be disposed in a manner such as chip on glass (COG), chip on film (COF), or tape-on-carrier (TCP), but embodiments of this disclosure are not limited thereto. The flexible circuit board (or flexible film) 157 can be attached or bonded to a plurality of pad electrodes PE via a conductive adhesive layer, but embodiments of this disclosure are not limited thereto.

[0086] The printed circuit board 160 can be a component electrically connected to one or more flexible circuit boards (or flexible films) 157 to supply signals to the driver IC. The printed circuit board 160 can be disposed on one side of the flexible circuit board (or flexible film) 157 for electrical connection to the flexible circuit board (or flexible film) 157. A series of components for supplying various signals to the driver IC can be disposed on the printed circuit board 160. For example, various components including timing controllers, power supplies, memory, processors, etc., can be disposed on the printed circuit board 160. For example, the printed circuit board 160 can be provided with a power management integrated circuit (PMIC), but embodiments of this disclosure are not limited thereto.

[0087] The printed circuit board 160 may include at least one hole 180, but embodiments of this disclosure are not limited thereto. In the area corresponding to the at least one hole 180, an internal component for detecting ambient light, temperature, etc., may be provided, and this internal component may include multiple sensors. For example, the internal component may include an ambient light sensor (ALS) or a temperature sensor, but embodiments of this disclosure are not limited thereto. For example, the hole 180 may be a through hole, but embodiments of this disclosure are not limited thereto. As an example, the hole 180 may be omitted depending on the design.

[0088] Reference Figure 2 The polarization layer 293 can be disposed on the display panel 100. The polarization layer 293 can reduce, prevent, or mitigate the phenomenon that light generated by an external light source enters the interior of the display panel 100 and affects the light-emitting elements, etc. As an example, the polarization layer 293 can be omitted depending on the design.

[0089] A cover member 155 may be disposed on the polarizing layer 293. The cover member 155 may comprise a transparent material. For example, the cover member 155 may comprise a cover glass made of glass or a plastic material, but is not limited thereto. The cover member 155 may be a component for protecting the display panel 100. An adhesive layer 295 may be disposed between the polarizing layer 293 and the cover member 155. The cover member 155 can be attached to the display panel 100 via the adhesive layer 295. The adhesive layer 295 may include optically clear adhesive (OCA), optically clear resin (OCR), pressure-sensitive adhesive (PSA), etc., but embodiments of this disclosure are not limited thereto. As an example, the adhesive layer 295 may be omitted depending on the design. As an example, the cover member 155 may be attached to the display panel 100 without the adhesive layer 295, but is not limited thereto.

[0090] As an example, the display panel 100 may include four corners, each corner having a rounded shape. For example, each corner of the display panel 100 may be formed into a circular shape. The implementation is not limited thereto. As an example, the display panel 100 may include three or more corners. As an example, at least one or all of the three or more corners may have a rounded shape. As an example, at least one or all of the three or more corners may be formed into a circular shape, but this is not a limitation.

[0091] The cover member 155 can be disposed on the upper side of the display panel 100 to protect the display panel 100.

[0092] A support substrate 145 may be disposed between the display panel 100 and the printed circuit board 160. The support substrate 145 can enhance the rigidity of the display panel 100. The support substrate 145 may be a back plate, but the embodiments of this disclosure are not limited thereto. For example, the support substrate 145 may be omitted, or it may be integrated with the display panel 100, but it is not limited thereto.

[0093] The support substrate 145 can be disposed below the display panel 100 to support the display panel 100.

[0094] As an example, the support substrate 145 may have four spline regions SPA1 to SPA4, each corresponding to one of the four arcuate corners of the display panel 100. Each spline region is an arcuate-shaped area at each of the four corners of the support substrate 145. For example, each spline region is an arcuate-shaped area where the horizontal and vertical edges of the support substrate 145 meet. A corresponding hole pattern PT may be formed in each of the spline regions SPA1 to SPA4. The implementation is not limited to this. As an example, the support substrate 145 may have at least one spline region corresponding to at least one arcuate corner of the display panel 100. As an example, a corresponding hole pattern PT may be formed in at least one spline region.

[0095] like Figure 3 As shown, the four spline regions SPA1 to SPA4 may include the first spline region SPA1 located in the upper left, the second spline region SPA2 located in the upper right, the third spline region SPA3 located in the lower right, and the fourth spline region SPA4 located in the lower left.

[0096] As an example, the support substrate 145 may have two horizontal edges parallel to each other and two vertical edges parallel to each other, but is not limited thereto. The lengths of the horizontal edges may differ from the lengths of the vertical edges. For example, the vertical edges may be formed to be longer or shorter than the horizontal edges, but is not limited thereto.

[0097] However, the embodiments disclosed herein are not limited thereto. For example, the lengths of the horizontal and vertical sides of the support substrate 145 may be the same.

[0098] In the support substrate 145, the first spline region SPA1 can be located at the junction of the horizontal and vertical edges in the upper left corner, and the second spline region SPA2 can be located at the junction of the horizontal and vertical edges in the upper right corner.

[0099] In addition, in the support substrate 145, the third spline region SPA3 can be set at the junction of the vertical and horizontal edges on the lower right, and the fourth spline region SPA4 can be set at the junction of the vertical and horizontal edges on the lower left.

[0100] The support substrate 145 may be disposed under the display panel 100 and attached to the display panel 100 via an adhesive member. When attached to the display panel 100, the support substrate 145 may be accurately attached and bonded to the display panel 100, for example, through a plurality of direct bonding bonds (DBK) in the inactive area NA of the display panel 100, but is not limited thereto.

[0101] At least one or each of the plurality of direct bond keys (DBKs) may be positioned in each outer region of each corner of the trimming line facing the substrate 110. For example, the plurality of direct bond keys (DBKs) may consist of four alignment key patterns, each alignment key pattern being disposed at a corresponding corner of the four corners of the substrate 110, but is not limited thereto.

[0102] As an example, multiple direct bond keys (DBKs) may include, but are not limited to, metallic materials. As an example, multiple direct bond keys (DBKs) may be formed by creating a black matrix with multiple openings on a metallic material such that the metallic material is exposed through the openings of the black matrix, but is not limited to this.

[0103] like Figure 4 As shown, when the support substrate 145 is attached to the display panel 100, a pressure P is applied for bonding the attachment, and the horizontal and vertical edges as well as the spline area (e.g., SPA1) are subjected to bending in the direction in which they are attached to the display panel 100. Figure 4 This is a view illustrating an example of applying pressure to a spline region according to an exemplary embodiment of the present disclosure. As an example, the support substrate 145 may experience tensile stress T due to tensile force in the effective region and compressive stress P due to compressive force in the ineffective region. The embodiment is not limited thereto. As an example, the boundary between the region experiencing tensile stress T and the region experiencing compressive stress P may not perfectly correspond to the boundary between the effective and ineffective regions. As an example, the region experiencing tensile stress T may be located inside the region experiencing compressive stress P, but is not limited thereto.

[0104] The horizontal edge may have a first curvature, and the horizontal edge is arc-shaped in the direction of the support substrate 145 being attached to the display panel 100 with the first curvature. The vertical edge may have a second curvature, and the vertical edge is arc-shaped in the direction of the support substrate 145 being attached to the display panel 100 with the second curvature.

[0105] When the horizontal and vertical sides of the support substrate 145 have the same degree of curvature, the first curvature and the second curvature can have the same value.

[0106] However, when the horizontal and vertical sides of the support substrate 145 have different degrees of curvature, the first curvature and the second curvature can have different values.

[0107] When the horizontal and vertical sides of the support substrate 145 are bent, each of the spline regions SPA1 to SPA4 is a composite curvature region where the horizontal curve and the vertical curve intersect each other.

[0108] Therefore, each of the spline regions SPA1 to SPA4 can have a third curvature, which is a composite curvature formed by the horizontal edges with a first curvature and the vertical edges with a second curvature that are joined together.

[0109] In the support substrate 145, the first strip region SPA1 located at the junction of the horizontal and vertical sides in the upper left corner can have a third-first curvature, wherein the horizontal side of the first curvature is connected to the vertical side of the second curvature so as to form an arc towards the upper left corner with the third-first curvature.

[0110] In the support substrate 145, the second spline region SPA2 located at the junction of the horizontal and vertical edges in the upper right corner can have a third-second curvature, wherein the horizontal edge of the first curvature and the vertical edge of the second curvature are connected together to form an arc towards the upper right corner with the third-second curvature.

[0111] In the support substrate 145, the third spline region SPA3 located at the junction of the vertical and horizontal edges in the lower right corner can have a third-third curvature, wherein the vertical edge of the second curvature is connected to the horizontal edge of the first curvature so as to form an arc towards the lower right corner with the third-third curvature.

[0112] In the support substrate 145, the fourth spline region SPA4 located at the junction of the vertical and horizontal edges in the lower left corner can have a third-fourth curvature, wherein the vertical edge of the second curvature is connected to the horizontal edge of the first curvature so as to form an arc towards the lower left corner with the third-fourth curvature.

[0113] As an example, the third-first curvature, the third-second curvature, the third-third curvature, and the third-fourth curvature can have the same value, but are not limited to this.

[0114] As an example, the third-first curvature, third-second curvature, third-third curvature, and third-fourth curvature can have different values ​​from each other, but are not limited to this. As an example, the third-first curvature, third-second curvature, third-third curvature, and third-fourth curvature can have values ​​that decrease sequentially. As an example, the third-first curvature, third-second curvature, third-third curvature, and third-fourth curvature can have values ​​that increase sequentially.

[0115] As an example, the value of the third-first curvature can be greater than the values ​​of the third-second, third-third, and third-fourth curvatures. As an example, the value of the third-first curvature can be less than the values ​​of the third-second, third-third, and third-fourth curvatures. As an example, the values ​​of the third-second, third-third, and third-fourth curvatures can be the same.

[0116] As an example, the value of the third-second curvature can be different from the values ​​of the third-first, third-third, and third-fourth curvatures. As an example, the values ​​of the third-first, third-third, and third-fourth curvatures can be the same. As an example, the value of the third-second curvature can be greater than the values ​​of the third-first, third-third, and third-fourth curvatures. As an example, the value of the third-second curvature can be less than the values ​​of the third-first, third-third, and third-fourth curvatures.

[0117] As an example, the value of the third-third curvature can be different from the values ​​of the third-first, third-second, and third-fourth curvatures. As an example, the values ​​of the third-first, third-second, and third-fourth curvatures can be the same. As an example, the value of the third-third curvature can be greater than the values ​​of the third-first, third-second, and third-fourth curvatures. As an example, the value of the third-third curvature can be less than the values ​​of the third-first, third-second, and third-fourth curvatures.

[0118] As an example, the value of the third-fourth curvature may be different from the values ​​of the third-first curvature, the third-second curvature, and the third-third curvature. As an example, the values ​​of the third-first curvature, the third-second curvature, and the third-third curvature may be the same. As an example, the value of the third-fourth curvature may be greater than the values ​​of the third-first curvature, the third-second curvature, and the third-third curvature. As an example, the value of the third-fourth curvature may be less than the values ​​of the third-first curvature, the third-second curvature, and the third-third curvature. The display device 1000 according to an exemplary embodiment of this disclosure may have various curvatures, not limited to those described above. The display device 1000 according to an exemplary embodiment of this disclosure may have various curvatures based on, for example, differences in the shape or length of the free-form portion.

[0119] According to an exemplary embodiment of the present disclosure, the support substrate 145 may have a hole pattern PT formed at at least one or each of the four corners (i.e., the first spline region SPA1 to the fourth spline region SPA4 with a third curvature of composite curvature), thereby dispersing the tensile stress T in the effective region to reduce or prevent cracks and displacement, and absorbing the compressive stress P in the non-effective region to reduce or prevent the occurrence of wrinkles.

[0120] Figure 5 This is a view showing the configuration of a hole pattern formed in a support substrate according to an exemplary embodiment of the present disclosure.

[0121] Reference Figure 5According to an exemplary embodiment of the present disclosure, the support substrate 145 may have a hole pattern PT, each of which is formed in a corresponding one of the first spline regions SPA1 to the fourth spline regions SPA4.

[0122] Hole pattern PT can be formed by alternately forming horizontal holes along the horizontal direction and vertical holes along the vertical direction. Horizontal holes and vertical holes can have shapes such as rectangles, ellipses, ellipses or rectangles with partial recesses in the middle part on one or both sides.

[0123] The support substrate 145 may include a back plate that enhances the rigidity of the display panel 100.

[0124] As an example, the support substrate 145 may be formed of a metallic material. This metallic material may include, for example, stainless steel (SUS). However, according to exemplary embodiments of this disclosure, the metallic material is not limited to this.

[0125] like Figure 6 As shown, the support substrate 145 may have a flat area FA and a patterned area for forming a hole pattern PT. Figure 6 It is along Figure 5 A cross-sectional view taken along centerline A-A'. Each hole pattern PT can be formed in one of the corresponding spline regions SPA1 to SPA4. As an example, the hole pattern PT may not be formed in the flat region FA. As an example, the pattern region may correspond to at least one or all of the spline regions SPA1 to SPA4. As an example, the size of the pattern region may be equal to, greater than or smaller than the size of the spline regions SPA1 to SPA4, but is not limited thereto.

[0126] The flat area FA is the area corresponding to the active area AA of the display panel 100. Each hole pattern PT may have a portion corresponding to the inactive area NA of the display panel 100, and the remaining portion may correspond to the active area AA of the display panel 100, but is not limited thereto. As an example, the entire pattern area may correspond to the inactive area NA of the display panel 100. As an example, at least a portion of the flat area FA may correspond to the inactive area NA of the display panel 100 (e.g., between adjacent pattern areas).

[0127] As an example, each spline region SPA1 to SPA4 may have a first region corresponding to the valid region AA and a second region corresponding to the invalid region NA, but is not limited thereto.

[0128] In this regard, as an example, the surface area of ​​the first region may be greater than the surface area of ​​the second region, but is not limited thereto.

[0129] The second region can correspond to the border region in the inactive region NA. The second region can overlap with the border region of the display panel 100.

[0130] Each hole pattern PT can be formed from a portion of the first region to the second region. For example, each hole pattern PT can partially overlap with the effective region AA.

[0131] The first region may include a flat region and a patterned region in which the hole pattern is formed.

[0132] In the first region, the flat area can have a certain length 'a'. For example, in the first region, the length of the flat area can be from 0.8 mm to 1.2 mm, but is not limited thereto. As an example, the flat area can have a length of, for example, 1.0 mm.

[0133] In each of the spline regions SPA1 to SPA4, the inner or outer diameter of the arc shape can range from 0.2 mm to 0.3 mm. For example, the inner diameter of the arc shape can be 0.2 mm, and the outer diameter can be 0.3 mm. For example, a donut-like arc with thickness (annular arc) has two radii (inner radius and outer radius). These two radii can be defined as the inner diameter and the outer diameter, respectively.

[0134] The support substrate 145 can be bonded to the display panel 100 via one of optically clear adhesive (OCA), optically clear resin (OCR), and pressure-sensitive adhesive (PSA). For example, as Figure 6 As shown, the support substrate 145 can be bonded to the display panel 100 using a pressure-sensitive adhesive (PSA) disposed thereon. Embodiments of this disclosure are not limited thereto. For example, the support substrate 145 can be bonded to the display panel 100 using an optically transparent adhesive disposed thereon.

[0135] Figure 7 This is a diagram illustrating the interaction between elements when pressure is generated on a support substrate according to an exemplary embodiment of the present disclosure.

[0136] Reference Figure 7 When the support substrate 145 according to an exemplary embodiment of the present disclosure is attached to the display panel 100, pressure is generated in each spline region SPA1 to SPA4 due to the bending caused by attachment, but the pressure is absorbed into the hole space by the hole pattern PT.

[0137] Figure 8 This is a view showing a hole pattern formed in an effective area and an ineffective area of ​​a support substrate according to an exemplary embodiment of the present disclosure.

[0138] Reference Figure 8The support substrate 145 according to an exemplary embodiment of the present disclosure may be formed of a metallic material SUS, and the hole pattern PT may be formed in the spline region, but is not limited thereto.

[0139] As an example, the hole pattern PT can be formed from the beginning of the spline region in the active region AA outwards to the inactive region NA. In this regard, the inactive region NA may include the border region BZ.

[0140] Figure 9 This is a view showing the cross-sectional structure of a support substrate according to an exemplary embodiment of the present disclosure.

[0141] Reference Figure 9 According to an exemplary embodiment of the present disclosure, the support substrate 145 may have a flat region and a slightly curved region in the effective area AA.

[0142] The hole pattern PT can be formed from a portion of the flat area of ​​the effective area AA (where the spline area may or may not have started) outwards to the ineffective area NA.

[0143] The display panel 100 may be disposed on the lower side of the support substrate 145, and the cover member 155 may be disposed on the lower side of the display panel 100. The embodiments of this disclosure are not limited thereto. For example, in a display device according to an exemplary embodiment of this disclosure, when the vertical positional relationship is reversed, the display panel 100 may be disposed on the upper side of the support substrate 145, and the cover member 155 may be disposed on the upper side of the display panel 100.

[0144] The support substrate 145 may have a curved region that is arc-shaped within the spline region. In this regard, the curved region may have a third curvature with a composite curvature, wherein the horizontal edge of the support substrate 145 having a first curvature and the vertical edge of the support substrate 145 having a second curvature are joined together to form an arc with the third curvature.

[0145] The display panel 100 and the cover member 155 may also be arc-shaped to correspond to the curved area of ​​the support substrate 145. The display panel 100 may have a fourth curvature, which is arc-shaped to correspond to the curved area of ​​the support substrate 145. The cover member 155 may also have a fifth curvature, which is arc-shaped to correspond to the curved area of ​​the support substrate 145. The fourth and fifth curvatures may have the same value. The fourth and fifth curvatures may also have different values.

[0146] Figure 10 This is a view showing a hole pattern formed in a first stripe region of a support substrate according to an exemplary embodiment of the present disclosure.

[0147] Reference Figure 10In the support substrate 145 according to an exemplary embodiment of the present disclosure, the hole pattern PT can be formed outward from an arc shape in the first strip region SPA1.

[0148] In this regard, the support substrate 145 can be made of a metallic material SUS and can have a hole pattern PT in the first stripe region SPA1, in which a plurality of holes penetrating the metallic material SUS are formed. The display panel 100 and the cover member 155 can be arranged continuously and disposed on each other in the outward direction of the hole pattern PT. The hole pattern PT can be formed in an arc shape with a third curvature of the composite curvature of the support substrate 145 in the first stripe region SPA1.

[0149] Figure 11 This is a view showing a hole pattern formed in a second spline region of a support substrate according to an exemplary embodiment of the present disclosure.

[0150] Reference Figure 11 In the support substrate 145 according to an exemplary embodiment of the present disclosure, a hole pattern PT can be formed outward from an arc shape by forming a plurality of holes penetrating the metal material SUS in the second spline region SPA2.

[0151] In this regard, the hole pattern PT can be formed into an arc shape with the third curvature of the composite curvature of the supporting substrate 145 in the second spline region SPA2.

[0152] Figure 12 This is a view showing a hole pattern formed in a fourth spline region of a support substrate according to an exemplary embodiment of the present disclosure.

[0153] Reference Figure 12 In the support substrate 145 according to an exemplary embodiment of the present disclosure, a hole pattern PT can be formed outward from an arc shape by forming a plurality of holes penetrating the metal material SUS in the fourth spline region SPA4.

[0154] The fourth spline region SPA4 can have a third curvature with a composite curvature, wherein a horizontal edge with a first curvature and a vertical edge with a second curvature are joined together to form an arc with the third curvature.

[0155] In this regard, the hole pattern PT can be formed as an outward arc shape with the third curvature of the composite curvature of the supporting substrate 145 in the fourth spline region SPA4.

[0156] As described above, the support substrate 145 according to the exemplary embodiment of the present disclosure has a corresponding hole pattern PT in each of the spline regions SPA1 to SPA4, so that even if it is subjected to pressure applied during the attachment process with the display panel 100, the hole pattern can absorb the pressure to reduce or prevent wrinkles and displacement in the support substrate.

[0157] Meanwhile, a display panel 100 attached to a support substrate 145 according to an exemplary embodiment of the present disclosure may include a plurality of light-emitting elements (although not shown) in an effective area AA.

[0158] Light-emitting elements can be formed on silicon wafers by methods such as metal-organic chemical vapor deposition (MOCVD), chemical vapor deposition (CVD), plasma-enhanced chemical vapor deposition (PECVD), molecular beam epitaxy (MBE), hydride vapor phase epitaxy (HVPE), sputtering, etc., but the embodiments disclosed herein are not limited thereto.

[0159] The light-emitting element may include an anode electrode, a first semiconductor layer, an active layer, a second semiconductor layer, a cathode electrode, and a sealing film, but the embodiments disclosed herein are not limited thereto. For example, the light-emitting element may not include a sealing film.

[0160] One of the first and second semiconductor layers can be a compound semiconductor such as a III-V or II-VI group semiconductor, and can be doped with impurities (or dopants). For example, one of the first and second semiconductor layers can be a semiconductor layer doped with n-type impurities, while the other can be a semiconductor layer doped with p-type impurities, but the embodiments of this disclosure are not limited to this. For example, at least one of the first and second semiconductor layers can be a layer doped with n-type or p-type impurities in a material such as gallium nitride (GaN), gallium phosphide (GaP), gallium arsenide phosphide (GaAsP), aluminum gallium indium phosphide (AlGaInP), indium aluminum phosphide (InAlP), aluminum gallium nitride (AlGaN), aluminum indium nitride (AlInN), aluminum indium gallium nitride (AlInGaN), aluminum gallium arsenide (AlGaAs), or gallium arsenide (GaAs), but the embodiments of this disclosure are not limited to this. For example, n-type impurities can be silicon (Si), germanium (Ge), selenium (Se), carbon (C), tellurium (Te), tin (Sn), etc., but the embodiments of this disclosure are not limited to this. For example, p-type impurities can be magnesium (Mg), zinc (Zn), calcium (Ca), strontium (Sr), barium (Ba), beryllium (Be), etc., but the embodiments disclosed herein are not limited to these.

[0161] The first semiconductor layer and the second semiconductor layer can be a nitride semiconductor containing n-type impurities and a nitride semiconductor containing p-type impurities, respectively, but the embodiments of this disclosure are not limited thereto. For example, the first semiconductor layer can be a nitride semiconductor containing p-type impurities, and the second semiconductor layer can be a nitride semiconductor containing n-type impurities, but the embodiments of this disclosure are not limited thereto.

[0162] An active layer may be disposed between a first semiconductor layer and a second semiconductor layer. The active layer can emit light by receiving holes and electrons from the first and second semiconductor layers. For example, the active layer may be configured as a single-well structure, a multi-well structure, a single quantum well structure, a multiple quantum well (MQW) structure, a quantum dot structure, and a quantum wire structure, but embodiments of this disclosure are not limited thereto. For example, the active layer may be composed of indium gallium nitride (InGaN) or gallium nitride (GaN), but embodiments of this disclosure are not limited thereto.

[0163] As another example, the active layer may include a multiple quantum well (MQW) structure having a well layer and a barrier layer with a band gap higher than the well layer. For example, the active layer may consist of an InGaN layer as the well layer and an AlGaN layer as the barrier layer, but embodiments of this disclosure are not limited thereto.

[0164] For example, the anode electrode may be composed of gold (Au), tin (Sn), tungsten (W), silicon (Si), silver (Ag), titanium (Ti), iridium (Ir), chromium (Cr), indium (In), zinc (Zn), lead (Pb), nickel (Ni), platinum (Pt), and copper (Cu), or any alloy thereof, but the embodiments of this disclosure are not limited thereto.

[0165] The cathode electrode can be made of materials such as indium tin oxide (ITO), indium zinc oxide (IZO), and indium gallium zinc oxide (IGZO), but the embodiments disclosed herein are not limited thereto.

[0166] A sealing film may be disposed on at least a portion of the first semiconductor layer, the active layer, the second semiconductor layer, the anode electrode, and the cathode electrode. For example, the sealing film may surround at least a portion of the first semiconductor layer, the active layer, the second semiconductor layer, the anode electrode, and the cathode electrode. For example, the sealing film may be configured with an insulating material such as silicon nitride (SiNx) or silicon oxide (SiOx), but embodiments of this disclosure are not limited thereto.

[0167] For example, light-emitting elements can have a vertical structure, a horizontal structure, or a flip-chip structure.

[0168] A black matrix can be placed on the light-emitting elements in the effective area. The black matrix can reduce or prevent light leakage between adjacent light-emitting elements.

[0169] A cover layer can be disposed on the black matrix within the effective area. The cover layer can protect the configuration beneath it. For example, the cover layer can be composed of an organic insulating material, but embodiments of this disclosure are not limited thereto. For example, the cover layer can be configured with photoresist, polyimide (PI), or photoacrylic-based materials, but embodiments of this disclosure are not limited thereto. For example, the cover layer can be an outer coating or an insulating layer, but embodiments of this disclosure are not limited thereto.

[0170] like Figure 2 As shown, the polarizing layer 293 can be disposed on the cover layer of the display panel 100 via the first adhesive layer. The cover member 155 can be disposed on the polarizing layer via the second adhesive layer 295. For example, the first adhesive layer and the second adhesive layer 295 may include optically transparent adhesive (OCA), optically transparent resin (OCR), or pressure-sensitive adhesive (PSA), but the embodiments of this disclosure are not limited thereto.

[0171] Although not shown in the figures, multiple pad electrodes can be disposed in the second ineffective region NA2. An adhesive layer ACF can be disposed on the multiple pad electrodes. The adhesive layer ACF may be an adhesive layer in which conductive balls are dispersed in an insulating material, but embodiments of this disclosure are not limited thereto. When heat or pressure is applied to the adhesive layer ACF, the conductive balls can be electrically connected in the portion where heat or pressure is applied, thereby providing conductive properties. By disposing the adhesive layer ACF between the multiple pad electrodes and the flexible circuit board (or flexible film) 157, the flexible circuit board (or flexible film) 157 can be attached or bonded to the multiple pad electrodes. For example, the adhesive layer ACF may be an anisotropic conductive film ACF, but embodiments of this disclosure are not limited thereto.

[0172] The flexible circuit board (or flexible film) 157 can be disposed on the adhesive layer ACF. The flexible circuit board (or flexible film) 157 can be electrically connected to multiple pad electrodes through the adhesive layer ACF.

[0173] According to an exemplary embodiment of the present disclosure, when manufacturing the display device 1000, a support substrate 145 having a hole pattern formed in the corresponding corner can be bonded to the display panel 100.

[0174] Therefore, during the bonding of the support substrate 145 and the display panel 100, the pressure is absorbed by the hole pattern PT formed in the corresponding spline regions SPA1 to SPA4 of the support substrate 145, thereby reducing or preventing wrinkles or displacement in the support substrate 145.

[0175] Therefore, product defects can be reduced or prevented during the manufacturing of the display device 1000, thereby achieving the effect of a narrow bezel for the display device.

[0176] Furthermore, according to the exemplary embodiments of this disclosure, product quality can be improved, and thus a display device with high product reliability can be provided.

[0177] The display apparatus according to various exemplary embodiments of the present disclosure can be described as follows.

[0178] A display device according to an exemplary embodiment of the present disclosure may include a display panel including four corners, each having an arc shape; a cover member disposed on the display panel to protect the display panel; and a support substrate disposed below the display panel to support the display panel, and the support substrate may have four spline regions corresponding to the four corners of the display panel, each of the spline regions having a corresponding hole pattern formed therein.

[0179] The support substrate may have two horizontal sides that are parallel to each other and two vertical sides that are parallel to each other.

[0180] The horizontal edge may have a first curvature, which is arc-shaped in the direction of the support substrate being attached to the display panel. The vertical edge may have a second curvature, which is arc-shaped in the direction of the support substrate being attached to the display panel.

[0181] The first curvature and the second curvature can have the same value.

[0182] The first curvature and the second curvature can have different values ​​from each other.

[0183] Each of the spline regions can have a third curvature, which is a composite curvature formed by the intersection of a horizontal edge with a first curvature and a vertical edge with a second curvature.

[0184] Hole patterns can be formed by alternately forming horizontal holes along the horizontal direction and vertical holes along the vertical direction.

[0185] The support substrate may include a backplate that enhances the rigidity of the display panel.

[0186] The support substrate can be formed of a metallic material.

[0187] Metallic materials can include stainless steel.

[0188] The support substrate may include a flat area and a patterned area, with the hole pattern formed in the patterned area.

[0189] The display panel includes valid and invalid areas, and each of the spline areas may have a first area corresponding to the valid area and a second area corresponding to the invalid area.

[0190] The hole pattern can be formed from a portion of the first region to the second region.

[0191] The first region may include a flat region and a patterned region, with the hole pattern formed in the patterned region.

[0192] The length of the flat area in the first region can be from 0.8 mm to 1.2 mm.

[0193] The inner or outer diameter of the arc shape in each of the spline regions ranges from 0.2 mm to 0.3 mm.

[0194] The support substrate can be bonded to the display panel using one of the following: optically transparent adhesive, optically transparent resin, and pressure-sensitive adhesive.

[0195] Although this disclosure has been described with reference to the accompanying drawings provided as examples, the scope of this disclosure is not limited to the embodiments and drawings disclosed herein, and it will be apparent to those skilled in the art that various modifications can be made without departing from the inventive concept. Furthermore, even if the operational effects of the configuration according to this disclosure are not explicitly described in explaining the embodiments of this disclosure, the effects that can be foreseen through such configuration should naturally be acknowledged.

Claims

1. A display device, the display device comprising: Display panel; as well as A support substrate is disposed below the display panel to support the display panel. The support substrate has an arc-shaped spline region at each of its four corners, and each of the spline regions has a hole pattern formed therein.

2. The display device according to claim 1, wherein, The support substrate has two parallel horizontal sides and two parallel vertical sides, and The length of the horizontal side may be the same as or different from the length of the vertical side.

3. The display device according to claim 2, wherein, The horizontal edge has a first curvature, and the horizontal edge bends with the first curvature in the direction from the display panel to the supporting substrate, and The vertical edge has a second curvature, and the vertical edge bends with the second curvature in the direction from the display panel to the support substrate.

4. The display device according to claim 3, wherein, The first curvature and the second curvature have the same value.

5. The display device according to claim 3, wherein, The first curvature and the second curvature have different values ​​from each other.

6. The display device according to claim 3 or 4, wherein, Each of the spline regions has a third curvature, which is a composite curvature formed by the intersection of the horizontal edge having the first curvature and the vertical edge having the second curvature.

7. The display device according to claim 1, wherein, The hole pattern is formed by alternately forming a first hole along a first direction and a second hole along a second direction perpendicular to the first direction.

8. The display device according to claim 7, wherein, The first hole and the second hole are arranged alternately along the first direction and the second direction.

9. The display device according to claim 7, wherein, The support substrate has two horizontal sides parallel to the first direction and two vertical sides parallel to the second direction.

10. The display device according to claim 7, wherein, Each of the first hole and the second hole has a rectangular shape, an elliptical shape, or an elliptical or rectangular shape with a partial recess in the middle of one or two long sides.

11. The display device according to claim 1, wherein, The supporting substrate includes a back plate that enhances the rigidity of the display panel.

12. The display device according to claim 1, wherein, The support substrate is formed of a metal material, and The metal material includes stainless steel.

13. The display device according to claim 1, wherein, The support substrate includes a flat region and a patterned region, and the hole pattern is formed in the patterned region.

14. The display device according to claim 13, wherein, The display panel includes active and inactive areas, and Each of the spline regions has a first region corresponding to the valid region and a second region corresponding to the invalid region.

15. The display device according to claim 14, wherein, The hole pattern is formed from a portion of the first region to the second region.

16. The display device according to claim 15, wherein, The first region includes a flat region and a patterned region, wherein the hole pattern is formed in the patterned region.

17. The display device according to claim 1, wherein, The support substrate is bonded to the display panel using one of optically transparent adhesive, optically transparent resin, and pressure-sensitive adhesive.

18. The display device according to claim 1, further comprising: A cover member is disposed on the display panel to protect the display panel.

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