Display apparatus

Abstract

The present specification relates to a display device, wherein a narrow bezel is realized by forming a small radius of curvature of the bending portion of the display panel, and a reinforcing member is placed in the bending portion to reinforce the rigidity of the display panel.

Description

Technology Field

[0001] This specification relates to a display device, and more specifically, to a display device capable of implementing a narrow bezel by reducing the non-display area of ​​the display device and reinforcing the rigidity of the bending part. Background Technology

[0002] Display devices that display images on TVs, monitors, smartphones, tablet PCs, laptops, etc., are used in various methods and forms.

[0003] Among various types of display devices, Liquid Crystal Display Devices (LCDs) are still in use, and the scope of use and application of Organic Light Emitting Display Devices (OLEDs) is also rapidly expanding.

[0004] Display devices include a display panel having a plurality of light-emitting elements or liquid crystals for implementing an image and a driving transistor for individually controlling the operation of each light-emitting element or liquid crystal, thereby enabling the plurality of light-emitting elements or liquid crystals to display an image as intended.

[0005] Among these, liquid crystal displays (LCDs) are not self-emissive, so they require a light source such as a backlight that supplies light from the rear. Backlights increase the thickness of the LCD and limit the implementation of displays that can be bent or have various design shapes.

[0006] Organic light-emitting display devices with self-luminous elements can be implemented thinner than display devices that have an embedded light source, and since a separate light source is not required, bendable or display devices of various designs can be implemented.

[0007] Such an organic light-emitting display device includes a flexible display panel. The flexible display panel includes a display area for displaying an image and a non-display area surrounding the display area, and may include a bending portion that extends from the non-display area and can be bent. A pad portion may be disposed on one side of the bending portion for electrically connecting additional components, such as a driving portion for driving pixels or a flexible circuit board. The problem to be solved

[0008] The bending portion, which extends from one side of the front section—the area where the display panel's image is shown—and curves downward, has a larger radius of curvature as the thickness of the display device increases, thereby expanding the non-display area. When the non-display area increases, the overall size of the finished product including the display device grows larger, reducing portability and presenting design disadvantages. Additionally, there may be a problem where the user's gaze is diverted to the non-display area rather than focusing on the display area.

[0009] If the radius of curvature of the bending part is reduced to decrease the non-display area, the compressive and tensile forces applied to the bending part increase, and consequently, cracks may occur in the display panel or it may be damaged.

[0010] In addition, the bending part is located at the outermost edge of the display device and may be vulnerable to external impact. If an external impact is applied to the bending part, it may deform, leading to cracks or breakage.

[0011] Accordingly, in this specification, the radius of curvature of the bending portion is formed small so that the non-display area can be reduced.

[0012] In addition, by providing an additional reinforcing structure so that the bending part with a reduced radius of curvature does not easily deform, cracks and damage that may occur in the bending part can be prevented.

[0013] The problem to be solved according to the present specification is to provide a display device that reduces the non-display area and improves the rigidity of the bending part.

[0014] The problems of this specification are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0015] A display device according to an embodiment of the present specification may include: a display panel comprising a front portion which is an area for displaying an image, a bending portion which extends from the front portion and is bent, and a pad portion which extends from the bending portion and is disposed below the front portion; and a first plate, a cushion plate, and a second plate disposed between the front portion and the pad portion.

[0016] In addition, the cushion plate includes a first adhesive layer, a cushion layer, and a heat dissipation layer, and a part of the pad portion is in contact with the first adhesive layer, and another part of the pad portion is placed under the second plate, so that the radius of curvature of the bending portion is formed small and the non-display area of ​​the display device can be reduced.

[0017] A display device according to another embodiment of the present specification may include: a display panel comprising a front portion which is an area for displaying an image, a bending portion which extends from the front portion and is bent, and a pad portion which extends from the bending portion and is disposed below the front portion; and a first plate, a cushion plate, and a second plate disposed between the front portion and the pad portion.

[0018] In addition, the cushion plate includes a first adhesive layer, a cushion layer, and a heat dissipation layer, and the first adhesive layer may be formed to protrude further toward the bending portion area where the bending portion is located or one side of the bending portion than the cushion layer, the heat dissipation layer, and the second plate. Accordingly, the distance between the pad portion and the front portion becomes smaller as it gets closer to the bending portion area, so the radius of curvature of the bending portion becomes smaller, and the non-display area of ​​the display device can be reduced.

[0019] In addition, a first reinforcing member is further disposed on the outer part of the bending section, and a second reinforcing member is further disposed on the inner part of the bending section, so that cracks and damage that may occur in the bending section can be prevented.

[0020] A display device according to another embodiment of the present specification may include: a display panel comprising a front portion which is an area for displaying an image, a bending portion which extends from the front portion and bends, and a pad portion which extends from the bending portion and is disposed below the front portion; and a first adhesive layer disposed between the front portion and the pad portion, a porous substrate, and a second plate.

[0021] The first adhesive layer protrudes further toward the bending portion region where the bending portion is located or one side of the bending portion than the second plate, and the porous substrate has a stepped portion including a second region disposed on the upper part of the second plate and a first region protruding further toward the bending portion region or one side of the bending portion, so that the non-display area of ​​the display device can be reduced.

[0022] Specific details of other embodiments are included in the detailed description and drawings. Effects of the invention

[0023] According to the embodiments of the present specification, by reducing the non-display area of ​​the display device, the overall size of the display device can be reduced, and the portability and design of the display device can be improved.

[0024] In addition, by placing additional reinforcing members in the bending section, it is possible to have the effect of preventing cracks and damage that may occur in the bending section.

[0025] The effects of this specification are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below. Brief explanation of the drawing

[0026] FIG. 1A is a plan view showing the front of a display device. FIG. 1B is a plan view showing the back of the display device. Figure 2 is a cross-sectional view along the line I-I' of Figure 1A. FIG. 3 is a cross-sectional view illustrating an embodiment of a display device according to the present specification. FIG. 4A is a cross-sectional view illustrating an embodiment in which a reinforcing member is arranged in a display device according to the present specification. FIG. 4B is an enlarged view of the "A" area of ​​FIG. 4A, and is a cross-sectional view illustrating another embodiment of a reinforcing member according to the present specification. FIG. 4C is an enlarged view of the "A" area of ​​FIG. 4A, and is a cross-sectional view illustrating another embodiment of a reinforcing member according to the present specification. FIG. 5 is a cross-sectional view illustrating another embodiment of a display device according to the present specification. FIG. 6 is a cross-sectional view illustrating a first adhesive layer according to the present specification. FIG. 7 is a cross-sectional view illustrating another embodiment of a display device according to the present specification. FIG. 8 is a cross-sectional view illustrating another embodiment of a display device according to the present specification. Specific details for implementing the invention

[0027] Specific details for implementing the present invention will become clear by referring to the embodiments described below together with the drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. The embodiments are provided merely to ensure that the disclosure of this specification is complete and to fully inform those skilled in the art of the scope of the invention, and the claims are not limited to the embodiments of the present invention.

[0028] Shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for describing embodiments of the present invention are exemplary, and therefore the present invention is not limited to the depicted details. Throughout the specification, the same reference numerals refer to the same components. Furthermore, in describing the present invention, if it is determined that a detailed description of related prior art could unnecessarily obscure the gist of the present specification, such detailed description is omitted. Where terms such as "includes," "has," or "is made up" are used in the present specification, other parts may be added unless "only" is used. Where a component is expressed in the singular, it includes cases where it is included in the plural unless specifically stated otherwise.

[0029] In interpreting the components, they are interpreted to include a margin of error even in the absence of a separate explicit statement.

[0030] In the case of describing a positional relationship, for example, when the positional relationship between two parts is described using expressions such as 'on,' 'upper,' 'lower,' or 'next to,' one or more other parts may be located between the two parts unless 'immediately' or 'directly' is used.

[0031] When an element or layer is referred to as "on" another element or layer, it includes cases where another layer or element is placed directly on top of or in between.

[0032] Although terms such as "first," "second," etc. are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the technical scope of this specification.

[0033] Throughout the specification, the same reference numerals refer to the same components.

[0034] The size and thickness of each component shown in the drawings are illustrated for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the illustrated components.

[0035] The features of each of the various embodiments of this specification may be combined or combined with one another, either partially or wholly, and as will be fully understood by those skilled in the art, various technical interlocking and operation are possible, and each embodiment may be implemented independently of one another or together in an interlocking relationship.

[0036] The display device of this specification may be applied to an organic light-emitting display device, but is not limited thereto, and may be applied to various display devices such as LED displays or quantum dot displays.

[0037] Hereinafter, the present specification will be described with reference to the drawings.

[0038] FIG. 1A is a plan view showing the front of a display device, and FIG. 1B is a plan view showing the back of a display device.

[0039] FIG. 1A shows the front side where the display area (AA) is located in the display device (10), and FIG. 1B shows the back side of the display device (10) on which the driving unit (160) and the flexible circuit board (500) are mounted.

[0040] Referring to FIGS. 1A and 1B, the display device (10) may include a cover member (20) and a display panel (100) attached to the lower part of the cover member (20) in the downward direction (-Z axis). The display device (10) may include a first plate, a cushion plate, a connecting member, and a second plate disposed below the front part of the display panel (100).

[0041] The cover member (20) is positioned to cover the front surface of the display panel (100) and can protect the display panel (100) from external impact. The cover member (20) may be formed of cover glass, tempered glass, and reinforced plastic, but is not limited thereto.

[0042] The edge portion of the cover member (20) may have a curved portion or a curved portion that is bent in the back direction (-Z axis) of the display device (10).

[0043] Since the cover member (20) can be positioned to cover the side area of ​​the display device (10) placed on the back surface, the display panel (100) can be protected from external impact not only on the front but also on the side of the display device (10).

[0044] The cover member (20) may be formed of a transparent material so as to overlap with the area displaying the image. For example, the cover member (20) may be made of a transparent plastic material that can transmit the image, or a cover glass made of a transparent glass material, but is not limited thereto.

[0045] A front portion (FP) of a display panel (100) may be disposed on the lower part of the cover member (20). The front portion (FP) may have a pixel array portion disposed therein, which includes a plurality of light-emitting elements, a pixel having a driving transistor, and a signal wiring that transmits a driving signal, so that an image may be displayed. The front portion (FP) may include a display area (AA: Active Area) where an image is displayed and a non-display area (NA: Non-Active Area) which is an area other than the display area (AA). The non-display area (NA) may be formed in the edge area surrounding the display area (AA). The non-display area (NA) may be an area that includes the bending portion (BND) area of ​​the display panel (100). Additionally, the bending portion (BND) of the display panel (100) is an area visible from the upper surface direction (Z-axis) of the display device (10), and is expressed as the bending portion (BND) non-display area (NA) as an area where an image is not displayed.

[0046] The display area (AA) and non-display area (NA) can be applied in the same way to the cover member (20). The area of ​​the cover member (20) through which the image is transmitted can be the display area. The area surrounding the display area through which the image is not transmitted can be the non-display area (NA).

[0047] The display panel (100) positioned at the bottom of the cover member (20) may include a bending portion that extends from one side of the front portion and bends.

[0048] The bending part is located at the outermost edge of the display panel (100) and can be easily exposed to external impact, and when impact is applied, it can easily deform, cause cracks, or be damaged.

[0049] Figure 2 is a cross-sectional view along the line I-I' of Figure 1A.

[0050] Referring to FIG. 2, the display device (10) may include a cover member (20) located at the top and a display panel (100) placed at the bottom of the cover member (20).

[0051] A first connecting member (150) may be disposed between the cover member (20) and the display panel (100). The first connecting member (150) may connect or combine the cover member (20) and the display panel (100).

[0052] Since the first connecting member (150) can overlap with the display area (AA), a material that allows the image of the display panel (100) to be transmitted can be used. For example, the first connecting member (150) may be formed from a material such as OCA (Optical Clear Adhesive), OCR (Optical Clear Resin), or PSA (Pressure Sensitive Adhesive), or may include such a material, but is not limited thereto.

[0053] A light-blocking portion (21) may be placed in the border area including the non-display area (NA) on the lower surface of the cover member (20).

[0054] The light-blocking part (21) can block various circuits, wiring, and various structures placed in the non-display area (NA) of the display panel (100) from being visible to the user.

[0055] The light-blocking portion (21) may be positioned to correspond to at least the non-display area (NA) of the display panel (100). The light-blocking portion (21) may be made of a material capable of absorbing light. For example, the light-blocking portion (21) may be made of a black matrix and may also be formed by printing black ink, but is not limited thereto.

[0056] A display panel (100) positioned at the bottom of a cover member (20) may include a front portion (FP), a bending portion (BND), and a pad portion (PAD) based on a display board (110).

[0057] The front portion (FP) of the display panel (100) may be positioned below the first connecting member (150). For example, the front portion (FP) may be a portion where an image is displayed and may include a display board (110), a pixel array portion (120), an encapsulation portion (130), and an optical plate (140).

[0058] The bending portion (BND) of the display panel (100) may be a part that extends from one side of the front portion (FP), bends downward (-Z axis), and then bends again in the plane (Y axis) direction. The bending portion (BND) may include a display board (110) and signal wiring.

[0059] The pad portion (PAD) of the display panel (100) may be extended from the bending portion (BND) and positioned at the bottom of the front portion (FP). The pad portion (PAD) may include a display board (110), signal wiring, and a pad electrode connected to the signal wiring. A driving portion (160) for driving a pixel or a flexible circuit board (500) may be mounted on the pad electrode.

[0060] An optical plate (140) may be disposed on the upper part of the front portion (FP). Additionally, a functional layer for improving the display performance of the display device may be further disposed between the first connecting member (150) and the optical plate (140).

[0061] The optical plate (140) can prevent reflection of external light to improve outdoor visibility and contrast ratio of the image displayed on the display panel (100).

[0062] A display board (110) may be disposed at the bottom of the display panel (100). The front portion (FP), the bending portion (BND), and the pad portion (PAD) may all have a display board (110). The display board (110) may be formed from a flexible plastic material and may have flexible characteristics. The display board (110) may be formed including polyimide and may also be formed from a thin glass material that has flexibility.

[0063] A pixel array section (120) may be disposed on the display board (110). The pixel array section (120) may display an image. The portion where the pixel array section (120) is disposed may become a display area (AA). Accordingly, the area corresponding to the pixel array section (120) relative to the cover member (20) becomes a display area (AA), and the area other than the display area (AA) may become a non-display area (NA).

[0064] The pixel array section (120) may include a light-emitting element, a thin-film transistor for driving the light-emitting element, and signal lines such as a gate line, a data line, and a pixel driving power line on the display substrate (110).

[0065] The pixel array section (120) may include a pixel that displays an image according to a signal supplied to signal lines, and the pixel may include a light-emitting element and a thin-film transistor. The light-emitting element may include an anode electrode electrically connected to the thin-film transistor, a light-emitting layer formed on the anode electrode, and a cathode electrode that supplies a common voltage.

[0066] A thin-film transistor may include a gate electrode, a semiconductor layer, a source electrode, and a drain electrode. The semiconductor layer of the thin-film transistor may include silicon such as a-Si, poly-Si, or low-temperature poly-Si, or an oxide such as IGZO (Indium-Gallium-Zinc-Oxide), but is not limited thereto.

[0067] The anode electrode is positioned in each pixel area to correspond to an aperture area provided according to the pattern shape of the pixel, and can be electrically connected to a thin-film transistor.

[0068] The light-emitting element may include a light-emitting layer formed between an anode electrode and a cathode electrode. The light-emitting layer may be implemented to emit light of the same color for each pixel, such as white light, or may be implemented to emit light of a different color for each pixel, such as red, green, or blue light.

[0069] The encapsulation portion (130) may be placed on the display substrate (110) to cover the pixel array portion (120). The encapsulation portion (130) can prevent oxygen, moisture, or foreign substances from penetrating into the light-emitting element layer of the pixel array portion (120). The encapsulation portion (130) may be formed as a multilayer structure in which an organic material layer and an inorganic material layer are alternately stacked, but is not limited thereto.

[0070] The front portion (FP) of the display panel (100) includes a display substrate (110), a pixel array portion (120), and an encapsulation portion (130), and can be formed in a flat state except for the border portion. A first plate (210) may be connected to or coupled to the front portion (FP) to maintain a flat state and enhance rigidity.

[0071] The bending portion (BND) of the display panel (100) is a part that can be easily bent in a direction desired by the user, and can be formed to include a display substrate (110) and signal wiring where the pixel array portion (120), the encapsulation portion (130), and the first plate (210) are not placed.

[0072] The pad portion (PAD) of the display panel (100) may be a portion where the pixel array portion (120) and the encapsulation portion (130) are not placed. A second plate (220) may be connected or coupled to the pad portion (PAD) so as to maintain a flat state and enhance rigidity.

[0073] That is, based on the shape of the display panel (100) before it is bent, the first plate (210) positioned at the bottom of the front portion (FP) of the display panel (100) and the second plate (220) positioned at the bottom of the pad portion (PAD) are combined with the bottom of the display board (110) to reinforce the rigidity of the display board (110) and maintain the front portion (FP) in a flat state.

[0074] The first plate (210) and the second plate (220) may be formed to have a certain strength and thickness to supplement the rigidity of the display substrate (110), and may not be formed in the bending portion (BND) area where the bending portion (BND) is located.

[0075] Based on the shape of the display panel (100) before it is bent, the first plate (210) and the second plate (220) are placed on the lower part of the display board (110) and can be spaced apart from each other.

[0076] Based on the shape of the display panel (100) after it has been bent, the first plate (210) is positioned at the bottom of the front portion (FP), and the second plate (220) is positioned at the top of the pad portion (PAD).

[0077] The first plate (210) and the second plate (220) may be backplates disposed on the back surface of the display substrate (110). The first plate (210) and the second plate (220) may be made of a plastic film having rigidity. For example, the first plate (210) and the second plate (220) may be composed of polyethylene terephthalate (PET), polyimide (PI), polyethylene naphthalate (PEN), etc., but are not limited thereto. The first plate (210) and the second plate (220) may be formed with the same material and thickness, but are not limited thereto.

[0078] Based on the shape of the display panel (100) after it has been bent, a cushion plate (300) may be placed between the first plate (210) and the second plate (220). The cushion plate (300) may be a plurality of layers or a single layer including a cushioning function and a heat dissipation function, and is not limited to the term.

[0079] The cushion plate (300) may include one or more of a heat dissipation layer (310), a lifting prevention layer (320), a cushion layer (330), and a first adhesive layer (340). For example, the cushion plate (300) may have a form in which the first adhesive layer (340), the cushion layer (330), the lifting prevention layer (320), and the heat dissipation layer (310) are laminated from top to bottom (-Z axis).

[0080] The heat dissipation layer (310) may be positioned in correspondence with a component that generates high temperature and may include a material having high thermal conductivity. The heat generated in the driving unit (160) or the display panel (100) can be dissipated by the heat dissipation layer (310).

[0081] For example, the heat dissipation layer (310) may include metals with high thermal conductivity such as copper (Cu) and aluminum (Al), or graphite, but is not limited thereto. Additionally, since the heat dissipation layer (310) is conductive, it may have a grounding function and a function to protect the back surface of the display board (110) along with a heat dissipation function.

[0082] A lifting prevention layer (320) may be placed on the heat dissipation layer (310).

[0083] The anti-lift layer (320) may be formed of a flexible material such as a polyimide film, but is not limited thereto.

[0084] The anti-lift layer (320) can be placed to prevent lifting of the cushion plate (300) when the side of the cover member (20) is bent, as lifting may occur.

[0085] Since the lifting prevention layer (320) has flexibility, it can minimize the lifting phenomenon that may occur when a curved portion is formed in the cover member (20).

[0086] The cushion layer (330) is placed on the anti-lift layer (320) and may include a cushioning material such as foam tape or foam pad. The cushion layer (330) can mitigate the impact of various parts that may come into contact with the cushion plate (300).

[0087] The cushion layer (330) having a shock-absorbing function can reinforce the rigidity of the cushion plate (300).

[0088] The first adhesive layer (340) is disposed on the cushion layer (330) and may include an uneven structure formed on the surface of the first adhesive layer (340). Since the uneven structure of the first adhesive layer (340) can prevent bubbles from forming between the first plate (210) and the cushion plate (300) when the cushion plate (300) is attached to the first plate (210), a degassing process to remove bubbles between the first plate (210) and the cushion plate (300) can be omitted.

[0089] The first adhesive layer (340) contains an adhesive component and can be in direct contact with the first plate (210) to fix the cushion plate (300) to the first plate (210).

[0090] A second connecting member (400) and a second plate (220) may be disposed on the lower part of the cushion plate (300).

[0091] The second connecting member (400) may be positioned between the cushion plate (300) and the pad portion (PAD) or the second plate (220). The second connecting member (400) may serve to fix the bent display panel (100) so that it maintains its bent shape. The second connecting member (400) may be formed to have a constant thickness in the thickness direction to maintain a constant curvature of the bending portion (BND). The second connecting member (400) may be a double-sided tape having adhesive strength capable of fixing the heat dissipation layer (310) of the second plate (220) and the cushion plate (300), but is not limited thereto. The second connecting member (400) may be formed as a foam tape or foam pad having adhesive strength to further have the effect of mitigating shock.

[0092] A second plate (220) may be placed below the second connecting member (400). In order to place and fix the second plate (220) below the second connecting member (400), the second plate (220) may be connected or attached to the lower surface of the pad portion (PAD) of the display panel (100), and the bending portion (BND) may be bent to attach or fix the second plate (220) to the lower surface of the second connecting member (400).

[0093] With the second plate (220) fixed to the second connecting member (400), the second plate (220) may have a structure disposed on the pad portion (PAD). That is, the second connecting member (400) and the second plate (220) may be disposed between the heat dissipation layer (310) of the cushion plate (300) and the pad portion (PAD).

[0094] With the second plate (220) fixed to the second connecting member (400), the outer part, which is the upper surface of the bending part (BND), is exposed to the outside, and the lower part, which is the inner part of the bending part (BND), can be positioned to face the side of the cushion plate (300) and the second connecting member (400).

[0095] A first reinforcing member (600) may be disposed on the upper surface, which is the outer part of the bending portion (BND) of the display panel (100). The first reinforcing member (600) covers the bending portion (BND) and may be extended to cover at least a portion of the front portion (FP) and the pad portion (PAD).

[0096] The first reinforcing member (600) may include resin. For example, the first reinforcing member (600) may include ultraviolet (UV) curable acrylic resin or thermosetting resin, and various materials may be used as the first reinforcing member (600), and are not limited to the materials described in this specification.

[0097] The first reinforcing member (600) can be formed from a cured resin that has undergone a curing process after applying the resin. If a UV-curing resin is used, it can be cured by irradiating with UV light. If a heat-curing resin is used, it can be cured by applying heat. The first reinforcing member (600) may be an MCL (Micro Cover Layer).

[0098] The first reinforcing member (600) can cover various signal wires placed between the sealing portion (130) and the pad portion (PAD) of the display panel (100), thereby protecting the signal wires from external impact and preventing moisture from penetrating into the signal wires.

[0099] In order to increase the flexibility of the display panel (100), some components other than the display board (110) and signal wiring may be removed from the bending section (BND), thereby reducing the rigidity, and the first reinforcing member (600) can compensate for the rigidity of the bending section (BND) from which the other components have been removed.

[0100] The bending portion (BND) is a part positioned between the front portion (FP) and the pad portion (PAD), and can be bent to connect the front portion (FP) and the pad portion (PAD) and position the pad portion (PAD) below the front portion (FP). The greater the degree of bending of the bending portion (BND), the greater the compressive and tensile forces applied to the signal wiring located on the bending portion (BND). If an external impact causes deformation of the bending portion (BND), cracks may occur or damage may occur in the bending portion (BND), which includes the signal wiring and the display board (110).

[0101] That is, since signal wiring located on the bending part (BND) may be damaged if the bending part (BND) is folded or bent abruptly, the bending part (BND) may be bent with a certain curvature. The curvature of the bending part (BND) can be indicated by the radius of curvature (R1); the larger the radius of curvature (R1), the larger the bending part (BND), and the smaller the radius of curvature (R1), the smaller the bending part (BND). As the radius of curvature (R1) of the bending part (BND) increases, the non-display area of ​​the bending part (BND) increases, and as the radius of curvature (R1) decreases, the non-display area of ​​the bending part (BND) decreases.

[0102] In order to reduce the non-display area of ​​the bending part (BND), if the bending part (BND) is not bent into a circular shape with a constant radius of curvature but is instead bent into a shape with a high angle of inclination and fixed, a bending phenomenon may occur at the point where the front part (FP) connects to the bending part (BND) or at the point where the bending part (BND) connects to the pad part (PAD), causing cracks or damage to the signal wiring.

[0103] Accordingly, the bending portion (BND) can be formed to have a constant radius of curvature depending on the distance between the front portion (FP) and the pad portion (PAD) in order to prevent damage to the display panel (100) or signal wiring.

[0104] For example, the bending portion (BND) can be bent by forming a radius of curvature (R1) that is half the length of the distance or thickness (T) between the front portion (FP) and the pad portion (PAD).

[0105] If the radius of curvature (R1) of the bending portion (BND) is greater than half the length of the distance or thickness (T) between the front portion (FP) and the pad portion (PAD), the bending portion (BND) may be positioned bent upward above the front portion (FP) or bent downward below the pad portion (PAD), which may cause interference with other parts. Additionally, the non-display area of ​​the bending portion (BND) may increase.

[0106] When the radius of curvature (R1) of the bending portion (BND) is formed with half the length of the thickness (T) or distance between the front portion (FP) and the pad portion (PAD), the radius of curvature (R1) of the bending portion (BND) and the non-display area can be determined by the distance between the front portion (FP) and the pad portion (PAD), so it becomes difficult to reduce the non-display area.

[0107] FIG. 3 is a drawing illustrating an embodiment of a display device according to the present specification.

[0108] Referring to FIG. 3, the display device (10) is an embodiment that can reduce the radius of curvature (R2) of the bending part (BND) and reduce the non-display area without adding or deleting components.

[0109] The display device (10) may include a cover member (20) and a display panel (100) attached to the lower portion of the cover member (20) in the downward direction (-Z axis). The display device (10) may include a first plate (210), a cushion plate (300), a second connecting member (400), and a second plate (220) disposed below the front portion (FP) of the display panel (100).

[0110] The cushion plate (300) may include one or more of a heat dissipation layer (310), a lifting prevention layer (320), a cushion layer (330), and a first adhesive layer (340). For example, the cushion plate (300) may have a form in which the first adhesive layer (340), the cushion layer (330), and the heat dissipation layer (310) are laminated from top to bottom (-Z axis).

[0111] The first plate (210) and the first adhesive layer (340) may be formed to protrude further toward the bending portion area or one side of the bending portion (BND) where the bending portion (BND) is located, than the cushion layer (330), the heat dissipation layer (310), and the second plate (220). Alternatively, the cushion layer (330), the heat dissipation layer (310), and the second plate (220) may be formed to recess in the opposite direction to the bending portion area or one side of the bending portion (BND) than the first plate (210) and the first adhesive layer (340).

[0112] When the first plate (210) and the first adhesive layer (340) are formed to protrude further, the cushion plate (300) may have a step-shaped step difference, and the thickness or distance between the pad portion (PAD) and the front portion (FP) may be formed to become smaller as it gets closer to the bending portion area or one side of the bending portion.

[0113] When the first plate (210) and the first adhesive layer (340) are formed to protrude further, a portion of the pad portion (PAD) of the display panel (100) may be connected to or in contact with the first adhesive layer (340), and another portion of the pad portion (PAD) may be placed under the second plate (220). To connect the portion of the pad portion (PAD) placed under the first adhesive layer (340) with the other portion of the pad portion (PAD) placed under the second plate (220), the pad portion (PAD) may have a portion extending diagonally. Since the pad portion (PAD) may bend due to the diagonally extended portion of the pad portion (PAD), the first plate (210) and the first adhesive layer (340) may be formed to protrude more than the cushion layer (330) or the second plate (220), thereby reducing the angle of the diagonally extended portion and reducing the occurrence of bending.

[0114] The bending portion (BND) of the display panel (100) can be supported on the upper surface of the first plate (210) and the lower surface of the first adhesive layer (340) and can be bent, and the radius of curvature (R2) of the bending portion (BND) can be formed to be half the length of the thickness of the first plate (210) and the first adhesive layer (340).

[0115] The radius of curvature (R2) of the bending part (BND) according to the embodiment of the present specification is half the length of the thickness of the first plate (210) and the first adhesive layer (340), and the radius of curvature (R1) of the bending part (BND) according to the embodiment of FIG. 2 is half the length of the thickness of the first plate (210), the cushion plate (300), the second connecting member (400), and the second plate (220), so the radius of curvature (R2) according to the embodiment of the present specification has a smaller size than the radius of curvature (R1) according to the embodiment of FIG. 2. Accordingly, the non-display area of ​​the bending part (BND) can also be reduced according to the reduced radius of curvature of the bending part (BND).

[0116] In order to reduce the non-display area of ​​the bending portion (BND), when a step is formed in the cushion plate (300), a part of the pad portion (PAD) of the display panel (100) may come into contact with or be fixed to the first adhesive layer (340), and another part of the pad portion (PAD) may be placed under the second plate (220). An adhesive or tape for fixing may be placed between the other part of the pad portion (PAD) and the second plate (220). Various methods for fixing the pad portion (PAD) may be applied and are not limited to a specific method.

[0117] As the radius of curvature of the bending part (BND) decreases, the tensile and compressive forces applied to the bending part (BND) increase; therefore, the radius of curvature of the bending part (BND) needs to be adjusted by considering the size of the non-display area of ​​the bending part (BND) and the force applied to the bending part (BND). To adjust the radius of curvature, the step formed on the cushion plate (300) can be adjusted to increase the radius of curvature.

[0118] Since the cushion plate (300) can be formed by stacking multiple layers, some of the layers can be retracted in the direction opposite to the bending portion area or one side of the bending portion (BND) to change the step thickness and change the radius of curvature of the bending portion (BND).

[0119] For example, when the anti-lift layer (320) and the heat dissipation layer (310) of the cushion plate (300) are retracted in the direction opposite to the bending portion area or one side of the bending portion (BND), the radius of curvature of the bending portion (BND) is formed to be half the length of the thickness of the first plate (210), the first adhesive layer (340), and the cushion layer (330), so the radius of curvature becomes larger than that of the embodiment of FIG. 3, and the tensile force and compressive force applied to the bending portion (BND) can be reduced.

[0120] Since the second connecting member (400) and the second plate (220) located at the bottom of the cushion plate (300) are also retracted along the lifting prevention layer (320) and the heat dissipation layer (310) in the direction opposite to the bending portion area or one side of the bending portion (BND), the angle of the portion extending diagonally of the pad portion (PAD) is reduced, and the occurrence of bending of the pad portion (PAD) can also be reduced.

[0121] In order to increase the radius of curvature of the bending portion (BND), the second connecting member (400) or the second plate (220) can be retracted in the opposite direction of the bending portion area or one side of the bending portion (BND) without forming a step on the cushion plate (300).

[0122] FIG. 4A is a cross-sectional view illustrating an embodiment in which a reinforcing member is arranged in a display device according to the present specification.

[0123] Referring to FIG. 4A, the outer part of the bending section (BND) with a reduced radius of curvature is subjected to a higher tensile force than the original, and the inner part is subjected to a higher compressive force than the original. If an external impact is applied to the bending section (BND) to which high compressive and tensile forces are applied and deformation occurs in the bending section (BND), cracks may occur or damage may occur in the display board (100) and signal wiring of the bending section (BND). Therefore, a first reinforcing member (600) may be placed on the upper surface, which is the outer part of the bending section (BND).

[0124] Additionally, a second reinforcing member (700) may be disposed on the lower surface, which is the inner part of the bending portion (BND). The second reinforcing member (700) covers the bending portion (BND) and may extend to at least a portion of the front portion (FP) and the pad portion (PAD).

[0125] The second reinforcing member (700) may include resin. For example, the second reinforcing member (700) may include ultraviolet (UV) curable acrylic resin or thermosetting resin, but is not limited thereto.

[0126] The second reinforcing member (700) can be formed by applying a soft resin and curing the resin through a curing process. After curing, the resin hardens firmly, allowing the bent shape of the bending part (BND) to be maintained and preventing external impact. Even if an external impact is applied, the bent shape of the bending part (BND) does not change, thereby preventing damage to the display board (110) or signal wiring of the bending part (BND).

[0127] When using a UV-curing acrylic resin, the UV rays are partially blocked by the first plate (210) placed in the upper area of ​​the display panel (100) and the second plate (220) placed in the lower area, making it difficult to sufficiently cure the resin. Therefore, after irradiating with UV rays, additional moisture curing can be performed to sufficiently cure the resin. Moisture curing can be achieved by exposing the resin to an environment with a humidity of 40% to 60% and a temperature of 20° to 26° for about 7 days.

[0128] That is, when using a UV-curable acrylic resin as the second reinforcing part (700), UV curing and moisture curing can be performed in parallel to sufficiently cure and form a hardened second reinforcing part (700).

[0129] The first reinforcing part (600) can be formed by applying and curing resin while the display panel (100) is bent to form a bending part (BND), but since the second reinforcing part (700) is located in the inner part of the display panel (100), it may be difficult to apply and cure it while the display panel (100) is in a bent bending part (BND) state.

[0130] In order to form the second reinforcing part (700), the resin can be applied before the display panel (100) is bent to form the bending part (BND), and the resin can be cured after the display panel (100) is bent to form the bending part (BND).

[0131] The resin must remain in a soft state before curing so that the display panel (100) can be bent, and must remain in a hard state after curing so that the bent shape of the bending part (BND) can be maintained, thereby preventing external impact.

[0132] Before curing, the resin is in a soft state and has flowability, so when applied to the bending section (BND) and the display panel (100) is bent, it may flow downward. Therefore, a dam can be additionally installed at the end of the resin application area to prevent the resin from flowing down. The first plate (210) or the second plate (220) placed on the front section (FP) and the pad section (PAD) can be used as a dam. That is, when resin is applied to the display panel (100) between the first plate (210) and the second plate (220), the resin is fixed without flowing due to the first plate (210) and the second plate (220), thereby forming a second reinforcing member (700) having a constant thickness.

[0133] FIG. 4B is an enlarged view of the "A" area of ​​FIG. 4A, and is a cross-sectional view illustrating another embodiment of the second reinforcing member according to the present specification.

[0134] Referring to FIG. 4B, the second reinforcing member (700) is formed to have a thickness that becomes thinner from top to bottom. There is no configuration in which one end of the second reinforcing member (700) is in contact with the first plate (210) and the other end is in contact with the second reinforcing member (700).

[0135] The resin for forming the second reinforcing member (700) has flowability before curing, so defects may occur if it penetrates into other components. Therefore, a dam can be formed at one end and the other end of the resin to prevent the resin in the pre-curing state from penetrating into other components. Alternatively, as shown in FIG. 4B, in the area where the first plate (210) is placed, the resin can be blocked from flowing like a dam, so the thickness of the resin can be made thick, and since there is no configuration to block the flow of the resin at the other end, the thickness of the resin can be made thin to reduce the flowability of the resin, thereby preventing the resin from penetrating into other components.

[0136] The second reinforcing member (700) can be formed with varying thickness from the first plate (210) to the first adhesive layer (340) depending on the purpose and effect.

[0137] FIG. 4C is an enlarged view of the "A" area of ​​FIG. 4A, and is a cross-sectional view illustrating another embodiment of the second reinforcing member according to the present specification.

[0138] Referring to FIG. 4C, the second reinforcing member (700) can be formed to fill the space between the bending part (BND), the first plate (210), and the first adhesive layer (340). Since the second reinforcing member (700) can reinforce the rigidity of the bending part (BND) as much as it is applied to the bending part (BND), the space between the bending part (BND), the first plate (210), and the first adhesive layer (340) can be sufficiently filled with resin and cured to increase the rigidity of the bending part (BND).

[0139] In order to increase the amount of resin applied to form the second reinforcing member (700), the first adhesive layer (340) placed below the first plate (210) can be formed with a length shorter than that of the first plate (210) to expose the end surface of the first plate (210). Additionally, the resin forming the second reinforcing member (700) can be applied to cover a portion of the side and bottom surface of the end of the first plate (210). That is, the second reinforcing member (700) can come into contact with at least a portion of the bottom surface and side surface of the first plate (210).

[0140] That is, the first plate (210) protrudes further toward the bending portion area where the bending portion (BND) is located or toward one side of the bending portion (BND) than the first adhesive layer (340), and the second reinforcing member (700) can be positioned to contact at least a portion of the lower surface and side surface of the first plate (210).

[0141] A method for forming the second reinforcing member (700) according to an embodiment of the present specification involves applying a high-viscosity resin to the bending portion (BND), partially curing it to form a state where the resin does not flow, bending the bending portion (BND), and then fully curing it to form the second reinforcing member (700). There may be various methods for forming the second reinforcing member (700), and it is not limited to a specific method.

[0142] And, when the second reinforcing member (700) is formed, the second reinforcing member (700) can support the intaglio or embossed pattern formed on the display board (110) to improve the bending of the bending portion (BND). Accordingly, the first plate (210) for supporting the pattern formed on the display board (110) is not required, and the length of the first plate (210) facing the bending portion (BND) area can be reduced.

[0143] FIG. 5 is a cross-sectional view illustrating another embodiment of a display device according to the present specification.

[0144] Referring to FIG. 5, when the radius of curvature of the bending part (BND) is small, the compressive force and tensile force applied to the bending part (BND) increase, and an embodiment in which the radius of curvature is adjusted is illustrated.

[0145] The radius of curvature of the bending portion (BND) can be changed by adjusting the distance between the front portion (FP) and the pad portion (PAD), and the distance between the front portion (FP) and the pad portion (PAD) can be changed by changing the thickness of the first plate (210), cushion plate (300), second connecting member (400), and second plate (220) placed between the front portion (FP) and the pad portion (PAD).

[0146] In the embodiment of FIG. 5, the thickness of the first adhesive layer (340) of the cushion plate (300) was increased to form a large radius of curvature (R3).

[0147] FIG. 6 is a drawing showing a first adhesive layer (340) applied to an embodiment of FIG. 5, wherein the first adhesive layer (340) may include a first base substrate (341) and a first layer (342a) and a second layer (342b) disposed on both sides or both sides of the first base substrate (341).

[0148] The first layer (342a) of the first adhesive layer (340) may have a plurality of embossed layers (342e), such as an uneven structure. For example, the embossed layer (342e) may be an embossed pattern or an embossed pattern layer, but is not limited to the term.

[0149] At least one of the first layer (342a), the second layer (342b), and the embossed layer (342e) may be composed of a material having an adhesive component. For example, the first layer (342a), the second layer (342b), and the embossed layer (342e) may all be composed of a material having an adhesive component.

[0150] The first layer (342a) of the first adhesive layer (340) may be a surface that contacts the first plate (210), and if the first layer (342a) has an embossed layer (342e), the formation of bubbles between the first plate (210) and the cushion plate (200) is prevented, thereby allowing the degassing process for removing bubbles to be omitted.

[0151] The first base substrate (341) can serve to hold the shape of the first adhesive layer (340) and can be made of a material having a certain strength and hardness to maintain the shape of the first base substrate (341). For example, the first base substrate (341) can be composed of a material such as PET (polyethylene terephthalate), but is not limited thereto.

[0152] The first layer (342a) and the second layer (342b) are materials having adhesive components, and a pressing phenomenon may occur due to external force. If the thickness of the first layer (342a) and the second layer (342b) is increased, the pressing phenomenon becomes more pronounced, and the shape of the first adhesive layer (340) may be deformed.

[0153] Accordingly, in order to increase the thickness of the first adhesive layer (340), the thickness of the first base substrate (341) can be increased, and the thickness of the first adhesive layer (340) can be increased without the occurrence of a pressing phenomenon.

[0154] The second layer (342b) can come into contact with the cushion layer (330). For example, the second layer (342b) can fix the cushion layer (330) by adhering it to the first adhesive layer (340).

[0155] The first base substrate (341) of the first adhesive layer (340) can serve to maintain the shape of the cushion layer (330) as well as the first adhesive layer (340), thereby improving the function of maintaining the shape of the cushion layer.

[0156] To change the radius of curvature of the bending section (BND), a component may be added between the front section (FP) and the pad section (PAD).

[0157] FIG. 7 is a cross-sectional view illustrating another embodiment of a display device according to the present specification.

[0158] Referring to FIG. 7, a second base substrate (342) and a second adhesive layer (344) are added between the front portion (FP) and the pad portion (PAD) to increase the distance between the front portion (FP) and the pad portion (PAD) and to form a large radius of curvature (R3).

[0159] The second base substrate (342) and the second adhesive layer (344) may be formed with a structure similar to that of the first adhesive layer (340). The second base substrate (342) may be adhered to or connected to the lower part of the first adhesive layer (340). The second adhesive layer (344) is composed of a material having an adhesive component and is disposed on the lower surface of the second base substrate (342) to adhere or connect the second base substrate (342) and the cushion layer (330).

[0160] The second base substrate (342) can serve to hold the shape of the first adhesive layer (340) and the second adhesive layer (344), and can be made of a material having a certain strength and hardness to maintain the shape of the second base substrate (342). For example, the second base substrate (342) can be composed of a material such as PET (polyethylene terephthalate), but is not limited thereto.

[0161] In the case of a structure in which a second base substrate (342) and a second adhesive layer (344) are added, compared to a structure in which only the thickness of the first adhesive layer (340) is increased, multiple layers are stacked and the strength can be increased.

[0162] FIG. 8 is a cross-sectional view illustrating another embodiment of a display device according to the present specification.

[0163] Referring to FIG. 8, the cushion plate (300) includes a first adhesive layer (340) and a porous substrate (350), and between the front portion (FP) and the pad portion (PAD) of the display panel (100), the first plate (210), the first adhesive layer (340), the porous substrate (350), and the second plate (220) may be included.

[0164] The first adhesive layer (340) can be laminated to a certain thickness on the upper surface of the porous substrate (350) and can be positioned to protrude further toward the bending portion area where the bending portion (BND) is located or toward one side of the bending portion (BND) than the second plate (220).

[0165] The first adhesive layer (340) contains an adhesive component and can fix the porous substrate (350) to the first plate (210).

[0166] The porous substrate (350) may be a porous metal structure comprising a conductive metal and a plurality of pores located inside the conductive metal.

[0167] Since the conductive metal of the porous substrate (350) is made of a metal with high thermal conductivity, the porous substrate (350) itself can provide excellent heat dissipation. Since the porous substrate (350) has the form of a metal structure having a number of pores inside, it can also provide excellent cushioning function.

[0168] Additionally, the porous substrate (350) is a conductive metal containing a number of pores inside, which increases the overall surface area and can provide excellent heat dissipation function on its own.

[0169] Accordingly, the cushion plate (300) according to the embodiment of the present specification can have effective heat dissipation and cushioning functions using only the porous substrate (350) without the need to configure the heat dissipation layer for the heat dissipation function and the cushioning layer for the cushioning function as separate layers.

[0170] A porous substrate (350) can be manufactured by sintering a metal foam precursor containing metal powder, and a porous substrate (350) can be manufactured in a desired shape by changing the shape of the frame used to manufacture the porous substrate (350).

[0171] A porous substrate (350) according to an embodiment of the present specification may include a second region (352) which is a lower region of the porous substrate, and a first region (354) which protrudes further than the second region (352) toward one side of the bending region or the bending region (BND), and may be formed to have a stepped portion.

[0172] That is, the cushion plate (300) according to the embodiment of the present specification has the same overall shape as the cushion plate according to another embodiment, but has a difference in that the heat dissipation layer or cushion layer, etc., is integrally formed.

[0173] The pad portion (PAD) of the display panel (100) may be positioned along a step below the porous substrate (350), and a part of the pad portion (PAD) may be fixed to a part of the first region (354) of the porous substrate (350), and another part of the pad portion (PAD) may be fixed to the lower part of the second plate (220).

[0174] An adhesive or tape may be applied to secure the pad portion (PAD). Various methods may be applied to secure the pad portion (PAD) to the cushion plate (300) or the second plate (220), but are not limited thereto.

[0175] Due to the step difference of the porous substrate (350), the radius of curvature (R3) of the bending portion (BND) can be adjusted, and the non-display area of ​​the bending portion (BND) can be reduced.

[0176] In the bending section (BND), a first reinforcing member (600) and a second reinforcing member (700) are formed in the same manner as in other embodiments, so that the rigidity of the bending section (BND) can be reinforced.

[0177] A display device according to the present specification may be described as follows.

[0178] A display device according to the present specification comprises: a display panel including a front portion which is an area for displaying an image, a bending portion extending from the front portion and bending, and a pad portion extending from the bending portion and disposed below the front portion; and a first plate, a cushion plate, and a second plate disposed between the front portion and the pad portion, wherein the cushion plate comprises a first adhesive layer, a cushion layer, and a heat dissipation layer, and a part of the pad portion may be in contact with the first adhesive layer, and another part of the pad portion may be disposed below the second plate.

[0179] A display device according to the present specification comprises: a display panel including a front portion which is an area where an image is displayed, a bending portion which extends from the front portion and is bent, and a pad portion which extends from the bending portion and is positioned below the front portion; and a first plate, a cushion plate, and a second plate positioned between the front portion and the pad portion, wherein the cushion plate comprises a first adhesive layer, a cushion layer, and a heat dissipation layer, and the first adhesive layer protrudes further toward the bending portion area where the bending portion is located than the cushion layer, the heat dissipation layer, and the second plate, and the distance between the pad portion and the front portion may be smaller as it is closer to the bending portion area.

[0180] According to some embodiments of the present specification, a first reinforcing member is further disposed on the outer surface of the bending portion, and a second reinforcing member is further disposed on the inner surface of the bending portion, and the second reinforcing member may have a constant thickness.

[0181] According to some embodiments of the present specification, a first reinforcing member is further disposed on the outer surface of the bending portion, and a second reinforcing member is further disposed on the inner surface of the bending portion, and the second reinforcing member may have a thickness that becomes thinner toward the bottom.

[0182] According to some embodiments of the present specification, a first reinforcing member is further disposed on the outer surface of the bending portion, and a second reinforcing member is further disposed on the inner surface of the bending portion, the first adhesive layer has a shorter length than the first plate, and the second reinforcing member can contact at least a portion of the lower surface and side surface of the first plate.

[0183] According to some embodiments of the present specification, the first adhesive layer comprises a first base substrate; a second layer disposed below the first base substrate; and a first layer disposed above the first base substrate, and the upper portion of the first layer may have an embossed pattern.

[0184] According to some embodiments of the present specification, a third plate and a second adhesive layer disposed between the first adhesive layer and the cushion layer may be further included.

[0185] A display device according to the present specification comprises: a display panel including a front portion which is an area for displaying an image, a bending portion which extends from the front portion and bends, and a pad portion which extends from the bending portion and is disposed below the front portion; and a first adhesive layer disposed between the front portion and the pad portion, a porous substrate, and a second plate, wherein the first adhesive layer protrudes further toward the bending portion area where the bending portion is located than the second plate, and the porous substrate may have a step portion comprising a second area disposed above the second plate and a first area which protrudes further toward the bending portion area.

[0186] According to some embodiments of the present specification, a portion of the pad portion may be fixed to a portion of a first region of a porous substrate, and another portion of the pad portion may be fixed to the lower part of a second plate.

[0187] Although embodiments of the present invention have been described in more detail with reference to the attached drawings, the present invention is not necessarily limited to these embodiments and may be modified in various ways within the scope of the technical spirit of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. The scope of protection of the present invention shall be interpreted by the claims, and all technical spirits within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0188] 10: Display device 20: Cover member 21: Light-blocking section 100: Display panel 110: Display board 120: Pixel array section 130: Encapsulation section 140: Optical plate 150: First connecting member 160: Driving part 210: 1st Plate 220: 2nd Plate 300: Cushion plate 310: Heat dissipation layer 320: Anti-lifting layer 330: Cushion layer 340: First adhesive layer 350: Porous substrate 352: Area 2 354: Area 1 400: Second connecting member 500: Flexible circuit board 600: First reinforcing member 700: Second reinforcing member AA: Display area NA: Non-display area FP: Front section BND: Bending section PAD: Pad section

Claims

Claim 1 A display panel comprising a front portion for displaying an image, a bending portion extending from the front portion and bending, and a pad portion extending from the bending portion and positioned below the front portion; and a display device comprising a first plate, a cushion plate, and a second plate positioned between the front portion and the pad portion, wherein the cushion plate comprises a first adhesive layer, a cushion layer, and a heat dissipation layer, a portion of the pad portion is in contact with the first adhesive layer, another portion of the pad portion is positioned below the second plate, and a step is formed between the portion of the pad portion in contact with the first adhesive layer and the other portion of the pad portion positioned below the second plate. Claim 2 A display panel comprising a front portion which is an area for displaying an image, a bending portion extending from the front portion and bending, and a pad portion extending from the bending portion and disposed below the front portion; and a display device comprising a first plate, a cushion plate, and a second plate disposed between the front portion and the pad portion, wherein the cushion plate comprises a first adhesive layer, a cushion layer, and a heat dissipation layer, and the first adhesive layer protrudes further toward one side of the bending portion than the cushion layer, the heat dissipation layer, and the second plate, and the distance between the pad portion and the front portion decreases as it goes toward one side of the bending portion. Claim 3 A display device according to claim 1 or 2, further comprising: a first reinforcing member disposed on the outer surface of the bending portion; and a second reinforcing member disposed on the inner surface of the bending portion; wherein the second reinforcing member has a constant thickness. Claim 4 A display device according to claim 1 or 2, further comprising: a first reinforcing member disposed on the outer surface of the bending portion; and a second reinforcing member disposed on the inner surface of the bending portion; wherein the thickness of the second reinforcing member varies from the first plate to the first adhesive layer. Claim 5 A display device according to claim 1 or 2, further comprising: a first reinforcing member disposed on the outer surface of the bending portion; and a second reinforcing member disposed on the inner surface of the bending portion; wherein the length of the first adhesive layer is shorter than the length of the first plate, and the second reinforcing member contacts at least a portion of the lower surface and side surface of the first plate. Claim 6 A display device according to claim 1 or 2, wherein the first adhesive layer comprises a first base substrate; a second layer disposed below the first base substrate; and a first layer disposed above the first base substrate, and the upper portion of the first layer has an embossed pattern. Claim 7 A display device according to claim 1 or 2, further comprising a third plate and a second adhesive layer disposed between the first adhesive layer and the cushion layer. Claim 8 A display panel comprising a front portion for displaying an image, a bending portion extending from the front portion and bending, and a pad portion extending from the bending portion and positioned below the front portion; and a first adhesive layer and a porous substrate positioned between the front portion and the pad portion, wherein the porous substrate comprises a first region positioned above the pad portion and a second region located on the first region and protruding more than the first region toward one side of the bending portion. Claim 9 A display device according to claim 8, wherein a part of the pad portion is connected to a part of the second region of the porous substrate, and another part of the pad portion is connected below the first region of the porous substrate.

Images