Display device

Abstract

A display device is provided. The display device includes: a first substrate including: a display area; and a non-display area including a bending area and a pad area; a display element layer on the display area; a bending protection layer on the pad region; a flexible circuit board on the pad region; the circuit protection layer is arranged on the bonding pad area and completely covers the flexible circuit board; a first support member under the display area; and a second support member under the pad region, spaced apart from the first support member, and including: a first surface in contact with the first substrate; the second surface is opposite to the first surface; a first side surface facing the first support member; and a second side surface. The second side surface includes a first inclined surface connected to the second surface, and the first inclined surface of the second support member overlaps the circuit protection layer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0085716, filed in the Korean Intellectual Property Office on July 3, 2023, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] Aspects of embodiments of the present disclosure relate to a display device. Background Art

[0004] As the information-oriented society develops, various demands on display devices are increasing. The display device may be a flat panel display device, such as a liquid crystal display device, a field emission display device, and a light emitting display device.

[0005] For example, a display device includes a display area where an image is displayed and a non-display area around the display area. Recently, the width of the non-display area has been reduced to make viewers more immersed in the content displayed on the display area and to increase the aesthetics of the display device.

[0006] The above information disclosed in this Background section is for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art. Summary of the invention

[0007] In a process of manufacturing a display device, the display device may be formed by cutting a mother substrate along a plurality of display units formed on the mother substrate.

[0008] One or more embodiments of the present disclosure are directed to a display device that can prevent or substantially prevent delamination between a display panel and a circuit board and can prevent or substantially prevent defects in a bending line when a module portion is bent.

[0009] One or more embodiments of the present disclosure are directed to a display device that can improve reliability by preventing or substantially preventing driving failure due to delamination between a display panel and a circuit board and preventing or substantially preventing defects in a bending line when a module portion is bent.

[0010] However, aspects and features of the present disclosure are not limited to those described above, and other aspects and features of the present disclosure will be apparent to those of ordinary skill in the art from the following description.

[0011] According to one or more embodiments of the present disclosure, a reinforcement member may be attached between a display panel and a circuit board, so that it may be possible to prevent or substantially prevent the circuit board from becoming separated when a module portion is bent.

[0012] According to one or more embodiments of the present disclosure, a display device includes: a first substrate including: a display area; and a non-display area, the non-display area surrounds the display area, and the non-display area includes a bending area and a pad area; a display element layer, the display element layer is on the display area of ​​the first substrate; a bending protection layer, the bending protection layer is on the bending area of ​​the first substrate; a flexible circuit board, the flexible circuit board is on the pad area of ​​the first substrate; a circuit protection layer, the circuit protection layer is on the pad area of ​​the first substrate and completely covers the flexible circuit board; a first support member, the first support member is below the display area of ​​the first substrate; and a second support member, the second support member is below the pad area of ​​the first substrate and is separated from the first support member, the second support member includes: a first surface, the first surface is in contact with the first substrate; a second surface, the second surface is opposite to the first surface; a first side surface, the first side surface connects the first surface to the second surface and faces the first support member; and a second side surface, the second side surface is opposite to the first side surface. The second side surface includes a first inclined surface connected to the second surface, and the first inclined surface of the second support member overlaps with the circuit protection layer.

[0013] In an embodiment, the first surface of the second supporting member may further include: a first portion overlapping the bending protection layer; a second portion overlapping the flexible circuit board and the circuit protection layer; and a third portion overlapping the circuit protection layer and not overlapping the flexible circuit board. The third portion of the second supporting member may be between the first portion and the second portion.

[0014] In an embodiment, the first portion and the third portion of the first surface of the second support member may be spaced apart from each other.

[0015] In an embodiment, the second side surface of the second supporting member may further include: a second inclined surface connected to the first surface; and a connecting surface connecting the first inclined surface to the second inclined surface. The first inclined surface and the connecting surface may form a first inclined angle therebetween, the second inclined surface and the connecting surface may form a second inclined angle therebetween, and the circuit protection layer may overlap the second inclined surface and the connecting surface.

[0016] In an embodiment, the circuit protection layer may include: an adhesive layer directly contacting the flexible circuit board; and a protection layer on the adhesive layer.

[0017] In an embodiment, the first support member and the second support member may include glass and plastic, and a thickness of each of the first support member and the second support member may be equal to or less than 200 μm.

[0018] In an embodiment, the first side surface of the second supporting member may further include: a third inclined surface connected to the second surface; and a fourth inclined surface connected to the third inclined surface and the first surface. The curved protection layer may overlap the third inclined surface and the fourth inclined surface.

[0019] In an embodiment, the display device may further include a display driver circuit on the flexible circuit board. The circuit protection layer may be in contact with the display driver circuit, and the circuit protection layer may completely cover the display driver circuit.

[0020] In an embodiment, the display device may further include a main circuit board spaced apart from the first substrate and connected to the first substrate through the flexible circuit board. The circuit protection layer may contact the main circuit board and may partially cover the main circuit board.

[0021] In an embodiment, the circuit protection layer may include an alignment mark in a plan view. The alignment mark may overlap the pad region and may be located at each of two corners on a side of the circuit protection layer closer to the pad region.

[0022] In an embodiment, the circuit protection layer may include an alignment hole in a plan view. The alignment hole may overlap the pad region and may be located at each of two corners on a side of the circuit protection layer closer to the pad region.

[0023] In an embodiment, when the first substrate is bent, the circuit protection layer may overlap the display element layer.

[0024] In an embodiment, the display device may further include an auxiliary circuit protection layer under the pad region of the first substrate. The auxiliary circuit protection layer may contact a lower portion of the second support member, and the auxiliary circuit protection layer may overlap the first inclined surface of the second support member.

[0025] In an embodiment, a width of the auxiliary circuit protection layer in the first direction may be greater than a width of the flexible circuit board in the first direction.

[0026] In an embodiment, the display device may further include a vacant area between the flexible circuit board and the auxiliary circuit protection layer, and the vacant area may be surrounded by the second support member, the first substrate, the flexible circuit board, and the auxiliary circuit protection layer.

[0027] In an embodiment, the display device may further include a main circuit board spaced apart from the first substrate and connected to the first substrate through the flexible circuit board. The auxiliary circuit protection layer may contact the main circuit board and may partially cover the main circuit board.

[0028] In an embodiment, when the first substrate is bent, the auxiliary circuit protection layer may overlap the display element layer.

[0029] In an embodiment, the display device may further include a display driver circuit between the bending protection layer and the circuit protection layer, and the display driver circuit may be spaced apart from the bending protection layer and the circuit protection layer.

[0030] In an embodiment, the display device may further include a display driver circuit on the pad area of ​​the first substrate and separated from the bending protection layer and the flexible circuit board between the bending protection layer and the flexible circuit board. The circuit protection layer may completely cover the display driver circuit and the flexible circuit board.

[0031] According to one or more embodiments of the present disclosure, a display device includes: a first substrate including: a display area; and a non-display area, the non-display area surrounds the display area, and the non-display area includes a bending area and a pad area; a display element layer, the display element layer is on the display area of ​​the first substrate; a bending protection layer, the bending protection layer is on the bending area of ​​the first substrate; a flexible circuit board, the flexible circuit board is on the pad area of ​​the first substrate; a first support member, the first support member is under the display area of ​​the first substrate; a second support member, the second support member is under the pad area of ​​the first substrate and is separated from the first support member; and an auxiliary circuit protection layer, the auxiliary circuit protection layer is under the pad area of ​​the first substrate and contacts the second support member under the second support member. The second support member includes: a first surface, the first surface contacts the first substrate; a second surface, the second surface is opposite to the first surface; a first side surface, the first side surface connects the first surface to the second surface and faces the first support member; and a second side surface, the second side surface is opposite to the first side surface. The second side surface includes a first inclined surface connected to the second surface, and the first inclined surface of the second support member overlaps with the auxiliary circuit protection layer.

[0032] According to one or more embodiments of the present disclosure, a reinforcement member may be attached between a display panel and a circuit board, so that reliability may be improved and a driving failure that may occur when a module portion is bent may be prevented or substantially prevented.

[0033] However, aspects and features of the present disclosure are not limited to those described above, and other aspects and features of the present disclosure will be more apparent to those of ordinary skill in the art from the following description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and other aspects and features of the present disclosure will be more clearly understood from the following detailed description of illustrative, non-limiting embodiments with reference to the accompanying drawings.

[0035] Figure 1 is a plan view showing a display device according to an embodiment of the present disclosure.

[0036] Figure 2 is a diagram showing an auxiliary region having a bent state Figure 1 A perspective view of a display device.

[0037] Figure 3 is a plan view showing a display device including a circuit board attached thereto according to an embodiment of the present disclosure.

[0038] Figure 4 is along Figure 3 A cross-sectional view of the display device taken along line X1-X1'.

[0039] Figure 5 yes Figure 4 An enlarged cross-sectional view of region A.

[0040] Figure 6 It is in a bent state Figure 4 A cross-sectional view of a display device.

[0041] Figure 7 yes Figure 4 An enlarged cross-sectional view of region A.

[0042] Figure 8 is along Figure 3 A cross-sectional view of the display device taken along line X1-X1'.

[0043] Fig. 9 yes Figure 8 An enlarged cross-sectional view of region C.

[0044] Fig.10 is along Figure 3 A cross-sectional view of the display device taken along line X1-X1'.

[0045] Fig.11 yes Fig.10 An enlarged cross-sectional view of region E of FIG.

[0046] Fig.12 is along Figure 3 A cross-sectional view of the display device taken along line X1-X1'.

[0047] Fig.13 is along Figure 3 A cross-sectional view of the display device taken along line X1-X1'.

[0048] Fig.14 is along Figure 3 A cross-sectional view of the display device taken along line X1-X1'. DETAILED DESCRIPTION

[0049] Hereinafter, the embodiments will be described in more detail with reference to the accompanying drawings, in which the same reference numerals always refer to the same elements. However, the present disclosure may be embodied in various different forms and should not be understood as being limited to the embodiments shown herein. On the contrary, these embodiments are provided as examples so that the present disclosure will be comprehensive and complete, and the aspects and features of the present disclosure will be fully conveyed to those skilled in the art. Therefore, for a complete understanding of the aspects and features of the present disclosure, processes, elements and techniques that are not necessary for those of ordinary skill in the art may not be described. Unless otherwise noted, throughout the drawings and written descriptions, the same reference numerals represent the same elements, and therefore, their redundant descriptions may not be repeated.

[0050] When a certain embodiment can be implemented differently, the specific process order may be different from the described order. For example, two processes described in succession may be performed simultaneously or substantially simultaneously, or may be performed in the reverse order of the described order.

[0051] In the accompanying drawings, for the sake of clarity, the relative size, thickness and ratio of elements, layers and zones can be exaggerated and / or simplified. For the purpose of ease of explanation, spatial relative terms such as "beneath", "below", "lower", "under", "above", "upper" etc. can be used in this article to describe the relationship between an element or feature and another (some) element or feature as shown in each figure. It will be understood that, in addition to the orientation depicted in each figure, the spatial relative terms are intended to contain different orientations of the device when in use or in operation. For example, if the device in each figure is turned over, the element described as "below" or "below" or "below" of other elements or features will be oriented to "above" of other elements or features. Therefore, the example terms "below" and "below" can include both the orientation above and below. The device can be oriented in other ways (for example, rotated 90 degrees or in other orientations), and the spatial relative descriptors used in this article should be interpreted accordingly.

[0052] In the drawings, the X-axis, Y-axis, and Z-axis are not limited to the three axes of the rectangular coordinate system and can be interpreted in a broader sense. For example, the X-axis, Y-axis, and Z-axis can be perpendicular to each other or substantially perpendicular to each other, or can represent different directions that are not perpendicular to each other.

[0053] It will be understood that although the terms "first", "second", "third", etc. can be used in this article to describe various elements, components, areas, layers and / or parts, these elements, components, areas, layers and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, area, layer or part from another element, component, area, layer or part. Therefore, without departing from the spirit and scope of the present disclosure, the first element, component, area, layer or part described below can be referred to as the second element, component, area, layer or part.

[0054] It will be understood that when an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, the element or layer can be directly on, directly connected to, or coupled to the other element or layer, or there may be one or more intervening elements or layers. Similarly, when a layer, region, or element is referred to as being "electrically connected" to another layer, region, or element, the layer, region, or element can be directly electrically connected to the other layer, region, or element, or can be indirectly electrically connected to the other layer, region, or element with one or more intervening layers, regions, or elements therebetween. In addition, it will be understood that when an element or layer is referred to as being "between" two elements or layers, the element or layer can be the only element or layer between the two elements or layers, or there may also be one or more intervening elements or layers.

[0055] The terms used herein are used to describe the purpose of a particular embodiment and are not intended to limit the present disclosure. As used herein, the "one" in the singular form is intended to also include the plural form unless the context clearly indicates otherwise. It will be further understood that the terms "include", "comprise" and "have" specify the presence of the features, wholes, steps, operations, elements and / or components when used in this specification, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their groups. As used herein, the term "and / or" includes any and all combinations of one or more of the items listed in the association. For example, the statement "A and / or B" means A, B, or A and B. Statements such as "at least one of...", when located after the element list, modify the entire element list and do not modify the individual elements in the list. For example, the statements "at least one of a, b or c", "at least one of a, b and c" and "at least one selected from the group consisting of a, b and c" indicate only a, only b, only c, both a and b, both a and c, both b and c, all or their variants of a, b and c.

[0056] As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation and not as terms of degree, and are intended to account for the inherent deviations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art. Additionally, when describing embodiments of the present disclosure, the use of "may" refers to "one or more embodiments of the present disclosure." As used herein, the term "using" may be considered synonymous with the term "utilizing."

[0057] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant field and / or this specification, and should not be interpreted in an idealized or overly formal sense, unless explicitly defined herein.

[0058] Figure 1 is a plan view showing a display device 10 according to an embodiment of the present disclosure. Figure 2 is a diagram showing the auxiliary area SBA in a bent state. Figure 1 A perspective view of a display device.

[0059] refer to Figure 1 and Figure 2 The display device 10 is a device for displaying moving images and / or still images. The display device 10 can be used as a display screen of various suitable portable electronic devices such as mobile phones, smart phones, tablet personal computers (PCs), smart watches, watch phones, mobile communication terminals, electronic notebooks, electronic books, portable multimedia players (PMPs), navigation devices, and ultra-portable mobile PCs (UMPCs), and display screens of various suitable products such as televisions, notebooks, monitors, billboards, and Internet of Things (IoT) devices.

[0060] The display device 10 may be a light-emitting display device, such as an organic light-emitting display device using an organic light-emitting diode, an inorganic light-emitting display device including an inorganic semiconductor, and a micro light-emitting display device using a micro light-emitting diode or a nano light-emitting diode (micro-LED or nano-LED). Hereinafter, for convenience, an organic light-emitting display device may be described in more detail as a representative example of the display device 10. However, the present disclosure is not limited thereto.

[0061] The display device 10 may include a display panel 100 , a display pad PD, and a bending protection layer 450 .

[0062] The display panel 100 may include a main area MA and an auxiliary area SBA.

[0063] The main area MA may include a display area DA at which an image is displayed and a non-display area NDA around (eg, adjacent to) the display area DA.

[0064] The main area MA of the display panel 100 may be formed in a rectangular planar shape having a shorter side extending in a first direction (e.g., an X-axis direction) and a longer side extending in a second direction (e.g., a Y-axis direction) intersecting or intersecting with the first direction (e.g., an X-axis direction). Each of the corners where the corresponding shorter side extending in the first direction meets the corresponding longer side extending in the second direction may be rounded with a suitable curvature (e.g., a predetermined curvature), or may be a right angle. When viewed from the top (e.g., in a plan view), the shape of the display panel 100 is not limited to a quadrilateral shape, and may be formed in a polygonal shape, a circular shape, or an elliptical shape different from the quadrilateral shape. The display panel 100 may be formed to be flat or substantially flat, but the present disclosure is not limited thereto. For example, the display panel 100 may be formed at the left and right ends, and may include a bending portion having a constant or substantially constant curvature or a varying curvature. In addition, the display panel 100 may be flexible so that it can be bent, curved, folded, or curled.

[0065] The display area DA may occupy most of the main area MA and may be disposed at the center of the main area MA. In the display area DA, pixels may be disposed to display an image. Each of the pixels may include a plurality of emission areas.

[0066] The non-display area NDA may be disposed adjacent to the display area DA. The non-display area NDA may be disposed outside the display area DA. The non-display area NDA may surround the display area DA (e.g., around the periphery of the display area DA). The non-display area NDA may be defined as a border area of ​​the display panel 100.

[0067] The auxiliary area SBA may protrude from one side of the main area MA in the first direction. The length of the auxiliary area SBA in the first direction may be smaller than the length of the main area MA in the first direction. Figure 1 As shown in , the length of the auxiliary area SBA in the second direction may be less than the length of the main area MA in the second direction, but the present disclosure is not limited thereto. For example, the length of the auxiliary area SBA in the second direction may be less than or equal to or substantially equal to the length of the main area MA in the second direction.

[0068] The auxiliary area SBA may include a first auxiliary area S1, a bending area BA, and a pad area PDA. The first auxiliary area S1, the bending area BA, and the pad area PDA may be arranged along the first direction.

[0069] The first auxiliary region S1 may protrude from one side of the main region MA in the first direction. One side of the first auxiliary region S1 may contact the non-display area NDA of the main region MA, and an opposite side of the first auxiliary region S1 may contact the bending area BA. Figure 1 As shown in FIG, the first auxiliary region S1 may be connected to the main region MA at a right angle, but the present disclosure is not limited thereto. The first auxiliary region S1 may be connected to the main region MA in a bent shape.

[0070] The bending area BA may be bendable and may be located between the first auxiliary area S1 and the pad area PDA. Figure 2 As shown in FIG. 1 , the auxiliary area SBA may be bent by the bending area BA, and the bent auxiliary area SBA may be located on the rear surface of the display panel 100. The curved pad area PDA may overlap the main area MA in a third direction (eg, Z-axis direction).

[0071] The bending protection layer 450 may be positioned to overlap the auxiliary area SBA. More specifically, the bending protection layer 450 may completely or substantially completely overlap the first auxiliary area S1 and the bending area BA, and may overlap a portion of the pad area PDA.

[0072] The bending protection layer 450 may protect various lines disposed in the bending area BA from moisture and oxygen. When viewed from the top (eg, in a plan view), the width of the bending protection layer 450 in the second direction may be less than or equal to the width of the display panel 100.

[0073] In the pad area PDA, a display pad PD may be provided. A plurality of display pads PD may be provided at the edge of the auxiliary area SBA and may be electrically connected to the display device 10 through an adhesive member. The plurality of display pads PD may provide data signals and control signals for driving pixels to the display element layer 150 (see, for example, FIG. 1 ). Figure 4 ).

[0074] The length of the plurality of display pads PD in the first direction may be greater than its length in the second direction. For example, when viewed from the top (eg, in a plan view), the display pads PD may have a shape that is not limited to a rectangle, a parallelogram, or a stripe extending in one direction.

[0075] Figure 3 is a plan view showing the display device 10 including the circuit board 300 attached thereto according to an embodiment of the present disclosure.

[0076] refer to Figure 3, the circuit board 300 may be attached to one end of the auxiliary area SBA of the display panel 100. The circuit board 300 may include a main circuit board 310 and a flexible circuit board 330.

[0077] The display driver circuit 200 may be located on the circuit board 300 and may be connected to the flexible circuit board 330 to operate by a chip on film (COF) technology. However, the present disclosure is not limited thereto. The display driver circuit 200 may be mounted by a chip on glass (COG) technology or a chip on plastic (COP) technology. The display driver circuit 200 may provide an electrical signal for driving a plurality of pixels to the display panel 100, and may also provide a touch signal for identifying a user's touch input, fingerprint pattern, and pen input.

[0078] The flexible circuit board 330 may electrically connect the display panel 100 to the main circuit board 310. One side of each of the flexible circuit boards 330 in the first direction may be attached to the pad area PDA of the display panel 100, and the opposite side of each of the flexible circuit boards 330 in the first direction may be attached to at least one of the main circuit boards 310. The flexible circuit board 330 may have flexibility to be bent. For example, the flexible circuit board 330 may be a flexible circuit film.

[0079] The main circuit board 310 may be connected to the flexible circuit board 330. The main circuit board 310 may be electrically connected to the display panel 100 through the flexible circuit board 330.

[0080] The circuit protection layer 470 may overlap the pad area PDA of the display panel 100. In addition, the circuit protection layer 470 may cover a portion of the main circuit board 310 spaced apart from the display panel 100. In other words, the circuit protection layer 470 may cover a portion of the display panel 100 and may extend to cover a portion of the main circuit board 310. Therefore, the circuit protection layer 470 may completely cover the flexible circuit board 330.

[0081] In some embodiments, the circuit protection layer 470 may not overlap the curved protection layer 450 and may be spaced apart from the curved protection layer 450 in the first direction. The width of the circuit protection layer 470 in the second direction may be equal to or less than the width of the display panel 100.

[0082] When the auxiliary area SBA is bent by the bending area BA, the circuit protection layer 470 can protect the display panel 100 and the flexible circuit board 330 from being separated from each other. In addition, it can be possible to prevent or substantially prevent a defect in which an undesigned additional line is generated when the auxiliary area SBA of the display panel 100 is bent.

[0083] In some embodiments, the circuit protection layer 470 may include an alignment mark AM and may be visually aligned with an alignment mark formed on the display panel 100. The alignment mark AM of the circuit protection layer 470 may be located at two corners (e.g., opposite corners) on a side closer to the curved protection layer 450 in the pad area PDA of the display panel 100. Figure 3 The alignment mark AM is shown to have a circular shape, but the present disclosure is not limited thereto. For example, the alignment mark AM may be formed in various suitable shapes such as a rectangle, a pentagon, a hexagon, a triangle, and a rhombus.

[0084] In addition, the alignment mark AM of the circuit protection layer 470 may be formed as a hole. The alignment mark AM of the circuit protection layer 470 may include any suitable shape as long as it can be used to align the lower display panel 100 with the circuit protection layer 470.

[0085] Figure 4 is along Figure 3 1 is a cross-sectional view of the display device 10 taken along line X1 - X1 ′.

[0086] refer to Figure 4 , the display device 10 may include a display panel 100, a polarizing film 190, and a cover window 500. The display panel 100 may include a first substrate 110, a second substrate 112, a display element layer 150, a thin film encapsulation layer 170, a touch sensor layer 180, and a bending protection layer 450. These layers or components of the display panel 100 may include regions corresponding to regions of the display panel 100. For example, the second substrate 112 may include a display area and a non-display area corresponding to a display area DA and a non-display area NDA of the display panel 100.

[0087] The first substrate 110 may include a rigid material that can transmit light. For example, the first substrate 110 may be a glass substrate or a plastic substrate. The first substrate 110 may be formed of ultra-thin glass (UTG) having a thickness of 200 μm or less.

[0088] In some embodiments, the first substrate 110 may be partially etched to form the bending area BA and support the second substrate 112. Thus, the first substrate 110 may be divided into a first auxiliary substrate 110a and a second auxiliary substrate 110b.

[0089] The first auxiliary substrate 110a of the first substrate 110 may overlap the main area MA and the first auxiliary area S1 of the auxiliary area SBA. The second auxiliary substrate 110b of the first substrate 110 may overlap the pad area PDA of the auxiliary area SBA. The first auxiliary substrate 110a and the second auxiliary substrate 110b may be spaced apart from each other to expose the bending area BA. Therefore, the first substrate 110 may ensure the bending area BA of the display panel 100.

[0090] The second substrate 112 may include (eg, may be made of) a polymer resin having a flexible material. For example, the second substrate 112 may have a thickness of approximately 20 μm. The second substrate 112 may be formed of an organic material such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, and / or a polyimide resin.

[0091] The display element layer 150 may be disposed on the second substrate 112 to overlap the display area DA of the main area MA. The display element layer 150 may be a layer that displays an image. The display element layer 150 may include an emission layer that emits light and a plurality of signal lines.

[0092] The thin film encapsulation layer 170 may be disposed over the display element layer 150 in the main area MA. The thin film encapsulation layer 170 may include at least one inorganic film to prevent or substantially prevent oxygen and / or moisture from penetrating into the display element layer 150. In addition, the thin film encapsulation layer 170 may include at least one organic film to protect the display element layer 150 from particles such as dust.

[0093] The touch sensor layer 180 may be disposed on the thin film encapsulation layer 170 in the main area MA. The touch sensor layer 180 may include sensor electrodes. The touch sensor layer 180 may sense a user's touch using the sensor electrodes.

[0094] The polarizing film 190 may be disposed on the display panel 100 to reduce reflection of external light. The polarizing film 190 may include a first base member, a linear polarizer, a retardation film (such as a λ / 4 (quarter wavelength) plate), and a second base member. The first base member, the retardation film, the linear polarizer, and the second base member of the polarizing film 190 may be sequentially stacked on the display panel 100.

[0095] The cover window 500 may be disposed on the polarizing film 190. The cover window 500 may be attached to the polarizing film 190 by a transparent adhesive member such as an optically clear adhesive (OCA) film.

[0096] The curved protection layer 450 may be disposed on the second substrate 112 in the auxiliary area SBA. The curved protection layer 450 may be disposed on the first and second auxiliary substrates 110a and 110b of the first substrate 110 and may overlap the first and second auxiliary substrates 110a and 110b in the third direction.

[0097] The bending protection layer 450 may include a synthetic resin. For example, the bending protection layer 450 may include at least one of acrylonitrile butadiene styrene copolymer (ABS), urethane acrylate (UA), polyurethane (PU), polyethylene (PE), ethylene vinyl acetate (EVA) and / or polyvinyl chloride (PVC).

[0098] When the substrate 112 is bent, the bending protection layer 450 can adjust the underlying wires disposed in the bending area BA so that they are positioned close to a neutral plane. In this way, the bending protection layer 450 can relieve the compressive stress that the underlying wires can receive.

[0099] The circuit protection layer 470 may be spaced apart from the bending protection layer 450, and may completely cover the flexible circuit board 330 and the display driver circuit 200. In addition, the circuit protection layer 470 may cover a portion of the main circuit board 310. In other words, the circuit protection layer 470 may cover a portion of the display panel 100, and may be extended to cover a portion of the main circuit board 310 spaced apart from the display panel 100.

[0100] In some embodiments, the circuit protection layer 470 may be transparent, rigid, adhesive, and non-conductive. For example, the circuit protection layer 470 may be, but is not limited to, a polyethylene terephthalate (PET) film. For example, the circuit protection layer 470 may include graphite, acrylic, silicone, and epoxy films, and its thickness may vary according to the characteristics of each film. For example, the thickness of the circuit protection layer 470 in the third direction may be equal to or greater than 0.1T (e.g., 0.1 mm).

[0101] The circuit protection layer 470 may protect the circuit board 300 from defects that may be caused when the auxiliary area SBA is bent. When the auxiliary area SBA is bent, the circuit protection layer 470 may prevent or substantially prevent delamination and cracking of the flexible circuit board 330. In addition, the circuit protection layer 470 may prevent or substantially prevent defects that may cause additional lines other than the designed bending lines on the display panel 100.

[0102] Figure 5 yes Figure 4 An enlarged cross-sectional view of region A.

[0103] refer to Figure 5The second auxiliary substrate 110b may include a first surface b1 contacting the second substrate 112, a second surface b2 opposite to the first surface b1, a first side surface b3 facing the main circuit board 310, and a second side surface b4 facing the first auxiliary substrate 110a.

[0104] In some embodiments, the first substrate 110 may undergo a grinding process during the manufacturing process. For example, the grinding process may be used to grind the edge of the substrate. Therefore, the first side surface b3 of the second auxiliary substrate 110b may include a first inclined surface s1 connected to the second surface b2, a second inclined surface s2 connected to the first surface b1, and a connecting surface s0 connecting the first inclined surface s1 to the second inclined surface s2. For example, since the second auxiliary substrate 110b includes the first inclined surface s1 and the second inclined surface s2, it can be seen that the first substrate 110 has undergone a grinding process during the manufacturing process.

[0105] In some embodiments, the first inclined surface s1 and the connecting surface s0 may form a first inclined angle θ1 therebetween, and the second inclined surface s2 and the connecting surface s0 may form a second inclined angle θ2 therebetween. Depending on the manufacturing process, the first inclined angle θ1 and the second inclined angle θ2 may be equal to each other, or may be unequal to each other.

[0106] During the manufacturing process, the second auxiliary substrate 110b may overlap the bending area BA and may undergo an etching process. Therefore, the second side surface b4 of the second auxiliary substrate 110b may include a third inclined surface s3 connected to the second surface b2 and a fourth inclined surface s4 connected to the first surface b1. The third inclined surface s3 and the fourth inclined surface s4 may form a third angle θ3 therebetween. For example, since the second auxiliary substrate 110b includes the third inclined surface s3 and the fourth inclined surface s4, it can be seen that the first substrate 110 has undergone an etching process at the portion of the bending area BA.

[0107] In some embodiments, the first surface b1 of the second auxiliary substrate 110b may include a first portion a1 overlapping the bending protection layer 450, a second portion a2 overlapping the circuit protection layer 470 and the flexible circuit board 330, and a third portion a3 overlapping the circuit protection layer 470 but not overlapping the flexible circuit board 330. The third portion a3 overlapping the circuit protection layer 470 but not overlapping the flexible circuit board 330 may be spaced apart from the first portion a1 overlapping the bending protection layer 450. Therefore, a spacing area SA may exist between the third portion a3 and the first portion a1, and in a plan view, the spacing area SA may be exposed between the bending protection layer 450 and the circuit protection layer 470 (e.g., may overlap an area between the bending protection layer 450 and the circuit protection layer 470).

[0108] Although the second auxiliary substrate 110b of the first substrate 110 has been described in more detail, the first auxiliary substrate 110a of the first substrate 110 may include a structure that is the same as or substantially the same as that of the second auxiliary substrate 110b of the first substrate 110. For example, the first auxiliary substrate 110a of the first substrate 110 may include an upper surface (which contacts the second substrate 112), a lower surface, and opposite side surfaces. The first auxiliary substrate 110a may include a third inclined surface s3 and a fourth inclined surface s4 facing the second auxiliary substrate 110b, which may be caused by an etching process, and may include a first inclined surface s1 and a second inclined surface s2 on opposite sides, which may be caused by a grinding process.

[0109] The flexible circuit board 330 may be disposed on the second auxiliary substrate 110b of the first substrate 110. One side of the flexible circuit board 330 in the first direction may be positioned on the main circuit board 310, and the opposite side in the first direction may be positioned on the second substrate 112. For example, in a cross-sectional view, the flexible circuit board 330 may be disposed on a portion of the second substrate 112 that overlaps with the second portion a2 of the second auxiliary substrate 110b.

[0110] In the cross-sectional view, the circuit protection layer 470 may be positioned on a portion of the second substrate 112 overlapping the second portion a2 and the third portion a3 of the second auxiliary substrate 110b. In other words, the circuit protection layer 470 may overlap the second inclined surface s2 and the first inclined surface s1 of the second auxiliary substrate 110b.

[0111] In some embodiments, the circuit protection layer 470 may include a first surface 470 - 1 including an adhesive surface and a second surface 470 - 2 including protective features. The first surface 470 - 1 of the circuit protection layer 470 may be disposed in direct contact with the flexible circuit board 330 and the display driver circuit 200 .

[0112] The circuit protection layer 470 may extend from the pad area PDA of the display panel 100 to cover a portion of the main circuit board 310 spaced apart from the display panel 100. Therefore, the circuit protection layer 470 may be positioned to completely cover the flexible circuit board 330 and the display driver circuit 200.

[0113] like Figure 5 As shown in , the thickness W310 of the main circuit board 310 in the third direction may be less than the thickness of the first substrate 110, but the present disclosure is not limited thereto. The thickness W310 of the main circuit board 310 in the third direction may be variously modified as needed or desired, and may be equal to or less than the thickness of the first substrate 110.

[0114] The bent protective layer 450 may be positioned on a portion of the second substrate 112 overlapping the first portion a1 of the second auxiliary substrate 110b. In other words, the bent protective layer 450 may overlap the third and fourth inclined surfaces s3 and s4 of the second auxiliary substrate 110b.

[0115] Figure 6 It is in a bent state Figure 4 1 is a cross-sectional view of a display device 10 .

[0116] refer to Figure 6 , the auxiliary area SBA of the display device 10 may be bent by the bending area BA. When the auxiliary area SBA is bent, the first auxiliary substrate 110a of the first substrate 110 may overlap the main area MA, the first auxiliary area S1 of the auxiliary area SBA, and the pad area PDA, and the second auxiliary substrate 110b of the first substrate 110 may overlap the non-display area NDA of the main area MA, the first auxiliary area S1 of the auxiliary area SBA, and the pad area PDA.

[0117] When the auxiliary area SBA is bent, the circuit protection layer 470 may be located in the main area MA and the pad area PDA of the auxiliary area SBA. In other words, when the auxiliary area SBA is bent, the circuit protection layer 470 may overlap the display element layer 150 included in the main area MA.

[0118] As described above, when the auxiliary area SBA is bent, the circuit protection layer 470 may prevent or substantially prevent the flexible circuit board 330 from being separated from the second substrate 112 and cracked.

[0119] Figure 7 yes Figure 4 An enlarged cross-sectional view of region A.

[0120] refer to Figure 7 , the first substrate 110 of the display device 30 may be subjected to laser etching during the manufacturing process. Figure 5 The description is different, Figure 7 The first side surface b3 of the second auxiliary substrate 110b shown in FIG. 1 includes a first rounded surface r1 and a second rounded surface r2. More specifically, the circuit protection layer 470 of the display device 30 may overlap the first rounded surface r1 and the second rounded surface r2 of the second auxiliary substrate 110b.

[0121] For example, since the first side surface b3 of the second auxiliary substrate 110 b includes the first circular surface r1 and the second circular surface r2 , it can be seen that the display device 30 has undergone a laser etching process during the manufacturing process. Figure 7Other elements shown in FIG. 1 may be the same or substantially the same as those described above, and thus, redundant descriptions thereof may not be repeated.

[0122] Figure 8 is along Figure 3 1 is a cross-sectional view of the display device 50 taken along line X1-X1'. Fig. 9 yes Figure 8 An enlarged cross-sectional view of region C.

[0123] refer to Figure 8 and Fig. 9 , the display device 50 further includes an auxiliary circuit protection layer 490 overlapping the circuit protection layer 470. The auxiliary circuit protection layer 490 may be located on the lower surface of the first substrate 110 and may contact the second auxiliary substrate 110b.

[0124] In some embodiments, the auxiliary circuit protection layer 490 may have a width W490 in the first direction greater than the width W330 of the flexible circuit board 330 in the first direction. Therefore, the auxiliary circuit protection layer 490 may cover a portion of the second auxiliary substrate 110b and a portion of the main circuit board 310 with a width greater than that of the flexible circuit board 330.

[0125] The auxiliary circuit protective layer 490 may overlap the first side surface b3 of the second auxiliary substrate 110b. Therefore, the auxiliary circuit protective layer 490 may overlap the first inclined surface s1 and the second inclined surface s2 of the second auxiliary substrate 110b.

[0126] The auxiliary circuit protection layer 490 can prevent or substantially prevent defects that may cause additional bending lines other than the designed bending lines on the display panel 100, and can prevent or substantially prevent physical line traces that may appear in the direction opposite to the bending direction. In other words, the reliability of the display device 50 can be improved.

[0127] However, the present disclosure is not limited to Figure 8 and Fig. 9 112. For example, the display device 50 may not include the circuit protection layer 470, and may include the auxiliary circuit protection layer 490 under the second substrate 112. However, it should be noted that when the circuit protection layer 470 and the auxiliary circuit protection layer 490 are positioned to overlap the flexible circuit board 330 on both sides, respectively, the protection of the flexible circuit board 330 of the display device 50 can be improved (for example, the protection of the flexible circuit board 330 of the display device 50 can be more reliably provided).

[0128] In some embodiments, the auxiliary circuit protection layer 490 may include a first surface 490 - 1 as an adhesive surface and a second surface 490 - 2 including a protection feature. The auxiliary circuit protection layer 490 may contact the second auxiliary substrate 110 b and the main circuit board 310 to cover them with a width greater than that of the flexible circuit board 330 .

[0129] In some embodiments, in the display device 50, there may be an empty area VA between the flexible circuit board 330 and the auxiliary circuit protection layer 490. The auxiliary circuit protection layer 490 may include the same material as the circuit protection layer 470 (for example, may be made of the same material as the circuit protection layer 470), and therefore, may have the same or substantially the same physical properties. For example, the auxiliary circuit protection layer 490 may be transparent, highly rigid, and adhesive. Therefore, the auxiliary circuit protection layer 490 may not cover a portion of the second auxiliary substrate 110b and a portion of the main circuit board 310, and may include an empty area VA.

[0130] Fig.10 is along Figure 3 2 is a cross-sectional view of the display device 60 taken along line X1-X1'. Fig.11 yes Fig.10 An enlarged cross-sectional view of region E of FIG.

[0131] refer to Fig.10 The display device 60 may differ from those described above in that the display driver circuit 200 is positioned separately from the circuit board 300. The display driver circuit 200 may be positioned between the bending protection layer 450 and the circuit protection layer 470 on the second auxiliary substrate 110b. The display driver circuit 200 may be disposed on the second substrate 112 and may be electrically connected to the flexible circuit board 330 by a chip on glass (COG) technology.

[0132] In some embodiments, the circuit protection layer 470 may be spaced apart from the display driver circuit 200 in the first direction and may completely cover the flexible circuit board 330. In other words, the circuit protection layer 470 of the display device 60 may not cover the display driver circuit 200.

[0133] refer to Fig.11, the first surface b1 of the second auxiliary substrate 110b included in the display device 60 may include a first portion e1 overlapping the bending protection layer 450, a second portion e2 overlapping the flexible circuit board 330 and the circuit protection layer 470, a third portion e3 overlapping the circuit protection layer 470 but not overlapping the flexible circuit board 330, and a fourth portion e4 overlapping the display driver circuit 200. The spacing area SA may be located between the first portion e1 overlapping the bending protection layer 450 and the fourth portion e4 overlapping the display driver circuit 200, and between the third portion e3 overlapping the circuit protection layer 470 but not overlapping the flexible circuit board 330 and the fourth portion e4 overlapping the display driver circuit 200. The spacing area SA may be exposed to the outside of the display device 60. The second portion e2 overlapping the flexible circuit board 330 and the circuit protection layer 470 may be connected to the third portion e3 overlapping the circuit protection layer 470 but not overlapping the flexible circuit board 330.

[0134] The flexible circuit board 330 may be disposed on the second auxiliary substrate 110b of the first substrate 110. One side of the flexible circuit board 330 in the first direction may be attached to the main circuit board 310, and the opposite side in the first direction may be attached to the second substrate 112. For example, the flexible circuit board 330 may contact a portion of the second substrate 112 that overlaps with the second portion e2 of the second auxiliary substrate 110b.

[0135] The circuit protection layer 470 may be positioned on a portion of the second substrate 112 overlapping the second portion e2 and the third portion e3 of the second auxiliary substrate 110b, and may contact the second substrate 112 overlapping the third portion e3 of the second auxiliary substrate 110b. The circuit protection layer 470 may overlap the second inclined surface s2 and the first inclined surface s1 of the second auxiliary substrate 110b. Fig.10 and Fig.11 Other elements shown in FIG. 1 may be the same or substantially the same as those described above, and thus, redundant descriptions thereof may not be repeated.

[0136] Figure 12 to Figure 14 is along Figure 3 A cross-sectional view of the display device taken along line X1-X1'.

[0137] refer to Fig.12 The display device 70 may differ from the display device 60 described above in that the display device 70 further includes an auxiliary circuit protection layer 490 covering the flexible circuit board 330 on a side opposite to the circuit protection layer 470. In addition, the display device 70 may differ from the display device 50 described above in that the auxiliary circuit protection layer 490 may not overlap with the display driver circuit 200.

[0138] The auxiliary circuit protection layer 490 may be positioned under the first substrate 110. In addition, the auxiliary circuit protection layer 490 may be disposed in contact with the second auxiliary substrate 110b. The auxiliary circuit protection layer 490 may have a width greater than that of the flexible circuit board 330 in the first direction. The auxiliary circuit protection layer 490 may be positioned to cover a portion of the second auxiliary substrate 110b and a portion of the main circuit board 310.

[0139] Although both the circuit protection layer 470 and the auxiliary circuit protection layer 490 are provided at Fig.12 , but the present disclosure is not limited thereto. For example, the display device 70 may not include the circuit protection layer 470, and may include an auxiliary circuit protection layer 490 under the second substrate 112. However, it should be noted that when the display device 70 includes both the circuit protection layer 470 and the auxiliary circuit protection layer 490 overlapping the flexible circuit board 330 on both sides, respectively, the protection of the flexible circuit board 330 can be enhanced (for example, can be more reliable).

[0140] The display driver circuit 200 of the display device 70 may be disposed between the circuit protection layer 470 and the bending protection layer 450 , and may be spaced apart therefrom in the first direction.

[0141] In some embodiments, in the display device 70 , a vacant area VA may exist between the flexible circuit board 330 and the auxiliary circuit protection layer 490 . Fig.12 Other elements shown in FIG. 1 may be the same or substantially the same as those described above, and thus, redundant descriptions thereof may not be repeated.

[0142] refer to Fig.13 The display device 80 may be different from those described above in that, in the display device 80, the display driver circuit 200 is separated from the circuit board 300, and the circuit protection layer 470 completely covers the display driver circuit 200 and the flexible circuit board 330 that are spaced apart (e.g., separated) from each other. The circuit protection layer 470 of the display device 80 may be spaced apart from the bending protection layer 450.

[0143] Since the circuit protection layer 470 of the display device 80 completely covers the display driver circuit 200 and the flexible circuit board 330 which are spaced apart from each other, the adhesive properties of the circuit protection layer 470 can be further enhanced when compared with those of the display device 70. As a result, the mechanical reliability of the circuit board 300 included in the display device 80 can be improved. Fig.13 Other elements shown in FIG. 1 may be the same or substantially the same as those described above, and thus, redundant descriptions thereof may not be repeated.

[0144] refer to Fig.14The display device 90 may differ from the display device 80 described above in that the display device 90 further includes an auxiliary circuit protection layer 490 overlapping the circuit protection layer 470. The auxiliary circuit protection layer 490 may be positioned on an opposite side of the second substrate 112 relative to the circuit protection layer 470.

[0145] The width W490 of the auxiliary circuit protection layer 490 in the first direction may be equal to or less than the width W470 of the circuit protection layer 470 in the first direction. Although in the example shown in the drawings, the auxiliary circuit protection layer 490 covers the flexible circuit board 330, the present disclosure is not limited thereto. In other words, the auxiliary circuit protection layer 490 may have a width W490 equal to the width W470 of the circuit protection layer 470, and may be positioned to overlap the display driver circuit 200 and the flexible circuit board 330.

[0146] Although both the circuit protection layer 470 and the auxiliary circuit protection layer 490 are provided Fig.14 , but the present disclosure is not limited thereto. For example, the display device 90 may not include the circuit protection layer 470, and may include an auxiliary circuit protection layer 490 under the second substrate 112. However, it should be noted that when the display device 90 includes both the circuit protection layer 470 and the auxiliary circuit protection layer 490 overlapping the flexible circuit board 330 on both sides, respectively, the protection of the display driver circuit 200 and the flexible circuit board 330 can be improved (for example, can be more reliable). Fig.14 Other elements shown in FIG. 1 may be the same or substantially the same as those described above, and thus, redundant descriptions thereof may not be repeated.

[0147] The foregoing is an illustration of some embodiments of the present disclosure and is not to be construed as limiting the present disclosure. Although some embodiments have been described, it will be readily understood by those skilled in the art that various modifications can be made to the embodiments without departing from the spirit and scope of the present disclosure. It will be understood that, unless otherwise described, the description of the features or aspects within each embodiment should typically be considered to be other similar features or aspects that can be used in other embodiments. Therefore, as will be apparent to those of ordinary skill in the art, unless otherwise explicitly indicated, the features, characteristics and / or elements described in conjunction with a particular embodiment may be used alone or in combination with the features, characteristics and / or elements described in conjunction with other embodiments. Therefore, it is to be understood that the foregoing is an illustration of various exemplary embodiments and should not be construed as being limited to the specific embodiments disclosed herein, and that various modifications to the disclosed embodiments and other exemplary embodiments are intended to be included in the spirit and scope of the present disclosure defined by the appended claims and their equivalents.

Claims

1. A display device, comprising: The first substrate comprises: display area; and a non-display area, the non-display area surrounding the display area, and the non-display area including a bending area and a pad area; A display element layer, the display element layer is on the display area of ​​the first substrate; a curved protection layer, the curved protection layer being on the curved region of the first substrate; A flexible circuit board, the flexible circuit board is on the pad area of ​​the first substrate; a circuit protection layer, the circuit protection layer being on the pad area of ​​the first substrate and completely covering the flexible circuit board; a first supporting member, the first supporting member being below the display area of ​​the first substrate; and A second supporting member, the second supporting member being below the pad region of the first substrate and spaced apart from the first supporting member, the second supporting member comprising: a first surface, the first surface being in contact with the first substrate; a second surface, the second surface being opposite to the first surface; a first side surface connecting the first surface to the second surface and facing the first supporting member; and a second side surface, the second side surface being opposite to the first side surface, The second side surface includes a first inclined surface connected to the second surface, and the first inclined surface of the second supporting member overlaps with the circuit protection layer.

2. The display device according to claim 1, wherein: The first surface of the second supporting member further comprises: a first portion, the first portion overlapping the bending protection layer; a second portion, the second portion overlapping the flexible circuit board and the circuit protection layer; and a third portion, the third portion overlaps with the circuit protection layer and does not overlap with the flexible circuit board, and Wherein, the third portion of the second supporting member is between the first portion and the second portion.

3. The display device according to claim 2, wherein: The first portion and the third portion of the first surface of the second support member are spaced apart from each other.

4. The display device according to claim 3, wherein: The second side surface of the second supporting member further includes: a second inclined surface connected to the first surface; and a connecting surface connecting the first inclined surface to the second inclined surface, and A first inclination angle is formed between the first inclined surface and the connecting surface, a second inclination angle is formed between the second inclined surface and the connecting surface, and the circuit protection layer overlaps with the second inclined surface and the connecting surface.

5. The display device according to claim 3, wherein: The circuit protection layer comprises: an adhesive layer, the adhesive layer being in direct contact with the flexible circuit board; and A protective layer is on the adhesive layer.

6. The display device according to claim 5, wherein: The first support member and the second support member include glass and plastic, and Herein, a thickness of each of the first supporting member and the second supporting member is equal to or less than 200 μm.

7. The display device according to claim 1, wherein: The first side surface of the second supporting member further includes: a third inclined surface connected to the second surface; and a fourth inclined surface connected to the third inclined surface and the first surface, and Wherein, the curved protection layer overlaps with the third inclined surface and the fourth inclined surface.

8. The display device according to claim 1, further comprising a display driver circuit on the flexible circuit board, in, The circuit protection layer contacts the display driver circuit, and Wherein, the circuit protection layer completely covers the display driver circuit.

9. The display device according to claim 8, further comprising a main circuit board separated from the first substrate and connected to the first substrate through the flexible circuit board, in, The circuit protection layer contacts the main circuit board and partially covers the main circuit board.

10. The display device according to claim 1, wherein: The circuit protection layer includes an alignment mark in a plan view, and The alignment mark overlaps with the pad region and is located at each of two corners on a side of the circuit protection layer closer to the pad region.

11. The display device according to claim 1, wherein: The circuit protection layer includes an alignment hole in plan view, and The alignment hole overlaps with the pad area and is located at each of two corners on a side of the circuit protection layer closer to the pad area.

12. The display device according to claim 1, wherein: When the first substrate is bent, the circuit protection layer overlaps the display element layer.

13. The display device according to claim 1, further comprising an auxiliary circuit protection layer, wherein the auxiliary circuit protection layer is below the pad region of the first substrate. in, The auxiliary circuit protection layer contacts a lower portion of the second supporting member, and Wherein, the auxiliary circuit protection layer overlaps with the first inclined surface of the second supporting member.

14. The display device according to claim 13, wherein: The width of the auxiliary circuit protection layer in the first direction is greater than the width of the flexible circuit board in the first direction.

15. The display device according to claim 14, further comprising an empty area between the flexible circuit board and the auxiliary circuit protection layer, in, The empty area is surrounded by the second supporting member, the first substrate, the flexible circuit board, and the auxiliary circuit protection layer.

16. The display device according to claim 15, further comprising a main circuit board separated from the first substrate and connected to the first substrate through the flexible circuit board, in, The auxiliary circuit protection layer contacts the main circuit board and partially covers the main circuit board.

17. The display device according to claim 15, wherein: When the first substrate is bent, the auxiliary circuit protection layer overlaps the display element layer.

18. The display device according to claim 1, further comprising a display driver circuit, wherein the display driver circuit is between the curved protection layer and the circuit protection layer. in, The display driver circuit is spaced apart from the bending protection layer and the circuit protection layer.

19. The display device according to claim 1, further comprising a display driver circuit, the display driver circuit being on the pad area of ​​the first substrate and being spaced apart from the bending protection layer and the flexible circuit board between the bending protection layer and the flexible circuit board, in, The circuit protection layer completely covers the display driver circuit and the flexible circuit board.

20. A display device, comprising: The first substrate comprises: display area; and a non-display area, the non-display area surrounding the display area, and the non-display area including a bending area and a pad area; A display element layer, the display element layer is on the display area of ​​the first substrate; a curved protection layer, the curved protection layer being on the curved region of the first substrate; A flexible circuit board, the flexible circuit board is on the pad area of ​​the first substrate; a first supporting member, the first supporting member being below the display region of the first substrate; a second supporting member, the second supporting member being below the pad region of the first substrate and spaced apart from the first supporting member; and an auxiliary circuit protection layer, the auxiliary circuit protection layer being below the pad region of the first substrate and contacting the second support member below the second support member, Wherein, the second supporting member comprises: a first surface, the first surface being in contact with the first substrate; a second surface, the second surface being opposite to the first surface; a first side surface connecting the first surface to the second surface and facing the first supporting member; and a second side surface, the second side surface being opposite to the first side surface, and The second side surface includes a first inclined surface connected to the second surface, and the first inclined surface of the second supporting member overlaps with the auxiliary circuit protection layer.

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