Display apparatus and method of fabricating the same

Abstract

A display device according to an embodiment of the present specification may include a display panel and a cushion plate disposed below the display panel. The cushion plate may include a porous member and a reinforcing plate, and can improve shock absorption and rigidity by eliminating the step difference of the display device.

Description

Technology Field

[0001] This specification relates to a display device, and more specifically, to a display device capable of increasing rigidity and shock absorption performance and improving appearance quality. Background Technology

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

[0003] Following the Liquid Crystal Display Apparatus (LCD) currently in use among display devices, the scope of use and application of Organic Light Emitting Display Apparatus (OLED) is rapidly expanding.

[0004] A display device includes a liquid crystal or a light-emitting element to implement an image, and includes a thin-film transistor for individually controlling the operation of each liquid crystal or light-emitting element, so that an image to be displayed is displayed on the display device.

[0005] Among these, the organic light-emitting display device includes a thin-film transistor for driving pixels and a light-emitting element that receives a signal from the thin-film transistor and generates light.

[0006] A light-emitting device comprises a light-emitting layer, an anode electrode that applies voltage to the light-emitting layer, and a cathode electrode that applies a common electrode. The light-emitting layer is positioned between the anode electrode and the cathode electrode, so that holes injected from the anode electrode move to the light-emitting layer and electrons injected from the cathode electrode move to the light-emitting layer, and electrons and holes recombine in the light-emitting layer to generate excitons. As the excitons change from an excited state to a ground state, fluorescent molecules in the light-emitting layer emit light, thereby enabling the display of an image.

[0007] The display device includes a display area that forms an image and a non-display area where various additional components, such as flexible circuit boards or driving parts, are arranged.

[0008] Additional components may be located in the non-display area, and the thickness and width of the display device may increase due to these additional components.

[0009] As the thickness and width of display devices increase, they present disadvantages in terms of design and portability; therefore, various technologies are being developed to reduce the thickness and width of display devices.

[0010] In addition, since display devices can be easily damaged by external impacts due to their thin thickness and complex configuration, various structures are being developed to improve shock absorption and rigidity. The problem to be solved

[0011] Components that constitute display devices, such as light-emitting elements and thin-film transistors, have characteristics that make them vulnerable to shock.

[0012] In order to reduce the thickness and width of the display device, if the thickness of the components of the display device is reduced or the components are changed, the rigidity and shock absorption function of the display device may be reduced.

[0013] In addition, components placed below the display panel can be visible through the display panel, which may lead to a problem where the external quality of the display device is degraded.

[0014] This specification aims to improve the rigidity, shock absorption function, and appearance quality of a display device while reducing the thickness and width of the display device.

[0015] The problems to be solved according to one embodiment of this specification are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0016] A display device according to an embodiment of the present specification comprises: a display panel on which an image is displayed; and a cushion plate disposed below the display panel; wherein the cushion plate comprises a porous member, a first reinforcing plate, and a first adhesive member, and the ends of the display panel and the cushion plate may coincide or be aligned.

[0017] A method for manufacturing a display device according to an embodiment of the present specification may include: a step of placing a precursor of a porous member comprising metal powder on a first reinforcing plate; a step of sintering the precursor of the porous member to form a porous member placed on the first reinforcing plate; a step of placing a first adhesive member on the first reinforcing plate; a step of placing a display panel on the first adhesive member; and a step of cutting a portion of the side regions of the display panel and the porous member with a laser.

[0018] Specific details of other embodiments are included in the detailed description and drawings. Effects of the invention

[0019] According to an embodiment of the present specification, since the cushion plate disposed at the bottom of the display panel is composed of a porous member, the thickness of the display device can be reduced while improving the shock absorption function.

[0020] In addition, by placing a first reinforcing plate on the porous member, the rigidity of the display device is improved, and the uneven surface of the porous member is prevented from being visible from the front through the display panel, thereby improving the appearance quality.

[0021] In addition, by aligning or matching the ends of the display panel and the cushion plate so that no components protrude from the display panel, damage to the display panel caused by external impact can be reduced.

[0022] 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

[0023] FIG. 1a is a plan view according to an embodiment of the present specification. Figure 1b is a cross-sectional view along line II' of Figure 1a. FIG. 2a is a plan view according to another embodiment of the present specification. Figure 2b is a cross-sectional view along the line II-II' of Figure 2a. FIGS. 3 to 6 are cross-sectional views along the line II-II' of FIG. 2a, illustrating other embodiments of the present specification. Specific details for implementing the invention

[0024] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0025] The 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 may unnecessarily obscure the essence of the present invention, such detailed description is omitted. Where terms such as "includes," "has," or "is made up" are used in the present invention, other parts may be added unless "only" is used. When a component is expressed in the singular, it includes cases where it is included in the plural unless specifically stated otherwise.

[0026] In interpreting the components, they are interpreted to include a margin of error even in the absence of a separate explicit statement.

[0027] 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.

[0028] 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.

[0029] Additionally, terms such as "first," "second," etc. are used to describe various components, but 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 the present invention.

[0030] Throughout the specification, the same reference numerals refer to the same components.

[0031] 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.

[0032] The features of each of the various embodiments of the present invention may be combined or combined with one another, either partially or wholly, and may technically enable various interlocking and operation. Each embodiment may be implemented independently of one another or may be implemented together in an associated relationship.

[0033] In this specification, the upper and upward directions may be in the Z-axis direction, and the lower and downward directions may be in the -Z-axis direction.

[0034] The top surface may be the upper surface, and the back surface may be the lower surface. Additionally, the upper side (upper side surface, upper part), lower side (lower side surface, lower part), left side (left side surface, left part), and right side (right side surface, right part) may be the upper, lower, left, and right sides in the planar direction (X-axis, Y-axis direction) of the cover member (or display panel). The side area is an area that includes certain areas of the upper side, lower side, left side, and right side, and the side may be a side surface.

[0035] An end or end area may be an end part or an area extending from an end part to a certain area, may be expressed as one side or a part, and is not limited to the term.

[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] The present specification will be described below with reference to the drawings.

[0038] FIG. 1a is a plan view according to an embodiment of the present specification.

[0039] Figure 1b is a cross-sectional view along line II' of Figure 1a.

[0040] Referring to FIGS. 1a and 1b, the display device (10) may include components such as a display panel (100), a support member (200), and a cushion plate (300).

[0041] The display panel (100) may include a display substrate made of a polymer, plastic such as polyimide (PI), or glass. The display substrate may include a display area for displaying an image and a non-display area. A pixel array portion for displaying an image may be disposed in the display area. The pixel array portion may include a plurality of sub-pixels and a driving circuit portion for driving the plurality of sub-pixels.

[0042] The non-display area is the area surrounding the display area, and it may be an area where the image is not displayed.

[0043] The bezel may be a non-display area surrounding the display area in a product to which the display device (10) is applied. The non-display area of ​​the display device (10) and the bezel may be the same area, but are not limited thereto.

[0044] A flexible circuit board (400) or a driving unit (410) may be placed or connected in the non-display area of ​​the display panel (100).

[0045] According to an embodiment of the present specification, the arrangement or connection method of the flexible circuit board (400) or the driving unit (410) may be applied by a Chip On Film (COF) method in which the flexible circuit board (400) on which the driving unit (410) is mounted is connected to a non-display area of ​​the display panel (100), or by a Chip On Plastic (COP) method in which the driving unit (410) is directly mounted on the display panel (100). The method of arranging or connecting the driving unit (410) or the flexible circuit board (400) to the display panel (100) is not limited thereto, and various methods may be applied.

[0046] One end of the flexible circuit board (400) is connected to the non-display area of ​​the display panel (100), and the other end is placed on the back surface of the display panel (100), so that the non-display area of ​​the display panel (100) visible from the front can be reduced.

[0047] In addition, the end of the display panel (100) on which the flexible circuit board (400) is mounted is also bent to a certain degree together with the circuit board (400), thereby further reducing the non-display area of ​​the display panel (100) visible from the front.

[0048] In order to minimize the non-display area of ​​the display panel (100) visible from the front, one end of the display panel (100) may be bent and positioned on the back of the display panel (100).

[0049] When the flexible circuit board (400) or display panel (100) is bent, the driving unit (410) can be placed below the display board.

[0050] The radius of curvature at which the display panel (100) or flexible circuit board (400) is bent increases as the thickness of the display device (10) increases, and the non-display area increases as the radius of curvature of the display panel (100) or flexible circuit board (400) increases.

[0051] Accordingly, by reducing the thickness of the display device (10), the radius of curvature of the flexible circuit board (400) or display panel (100) can be reduced, and the non-display area can be reduced.

[0052] A support member (200) may be optionally placed below the display panel (100).

[0053] The support member (200) can be placed at the bottom of the display board to reinforce the rigidity of the display board. The support member (200) can be formed to have a certain strength and thickness to reinforce the rigidity of the display board.

[0054] The support member (200) may be made of plastic materials such as PET (polyethylene terephthalate), PC (polycarbonate), and PI (polyimide), but is not limited thereto.

[0055] A cushion plate (300) may be placed on the lower part of the support member (200).

[0056] The cushion plate (300) has a heat dissipation function and a shock absorption function, and may include a first adhesive member (310) and a porous member (320). The first adhesive member (310) and the porous member (320) may be stacked sequentially in the downward direction of the display panel (100).

[0057] In another embodiment of the present specification, the cushion plate may be formed by laminating a plurality of layers having various functions, such as a heat dissipation layer having a heat dissipation function, an anti-lifting layer for preventing the heat dissipation layer from lifting, a cushion layer capable of absorbing shock, and an adhesive layer for bonding the heat dissipation layer and the cushion layer.

[0058] The structure of the cushion plate, including a heat dissipation layer, an anti-lift layer, a cushion layer, and an adhesive layer, is formed thicker than the structure of the cushion plate including a porous member (320) in a structure in which multiple layers are laminated. Additionally, when the thickness of the heat dissipation layer and the cushion layer is formed thicker to enhance the heat dissipation and shock absorption functions, the radius of curvature of the bending area of ​​the flexible circuit board (400) or display panel (100) increases by the increased thickness, and the non-display area increases.

[0059] Accordingly, the cushion plate (300) may include a porous member (320) having a thin thickness while having the functions of a heat dissipation layer and a cushion layer.

[0060] The porous member (320) is composed of a single structure rather than a stacked structure of a heat dissipation layer and a cushion layer, has a thin thickness, and can simultaneously have a heat dissipation function and a shock absorption function.

[0061] The cushion plate (300) including the porous member (320) may further include a first adhesive member (310) for adhesion with the support member (200).

[0062] The cushion plate (300) is formed to be smaller than the size of the display panel (100) and the support member (200), and can be attached to the back surface of the support member (200) through the first adhesive member (310).

[0063] The cushion plate (300) can be formed larger than the display panel (100) and the support member (200), but if the cushion plate (300) is formed larger than the display panel (100), the non-display area may be increased.

[0064] Accordingly, so that the non-display area of ​​the display device (10) is not increased, the porous member (320) may be formed to overlap the entire display panel (100) within an area that does not extend beyond the ends of the display panel (100) and the support member (200), or may be formed smaller than the support member (200) within a bending area where the display panel (100) and the flexible circuit board (400) are bent.

[0065] If the cushion plate (300) is formed to be smaller than the support member (200), the weight may be reduced and manufacturing costs may be lowered, but the heat dissipation and shock absorption functions may be reduced.

[0066] Also, a step is formed between the cushion plate (300) and the display panel (100), so that the display panel (100) can be easily damaged.

[0067] Referring to FIG. 1b, in the cross-sectional view of the display device (10), the step may be a part formed in a stepped shape where the display panel (100) and the support member (200) protrude beyond the cushion plate (300).

[0068] In the end area (or one side or part) of the display panel (100) where the step is formed, the display panel (100) protrudes without the cushion plate (300) being supported. Therefore, if an external impact is applied, the end of the display panel (100) can be easily damaged, and damage can be prevented by removing the step. This is explained below.

[0069] FIG. 2a is a plan view according to another embodiment of the present specification.

[0070] Figure 2b is a cross-sectional view along the line II-II' of Figure 2a.

[0071] Referring to FIGS. 2a and 2b, the sides of the display panel (100), support member (200), and cushion plate (300) are shown to be aligned without any step difference.

[0072] To remove the step difference of the display device (10), the step difference can be removed by attaching a cushion plate (300) to a support member (200) placed below the display panel (100) and then using a laser device (or laser) (500) to cut a portion of the side area of ​​the display device (10). The method for removing the step difference of the display device (10) is not limited to this, and various removal methods may be applied. By doing so, the problem that the end of the display panel (100) can be easily damaged when an external impact is applied when the display panel (100) is protruding can be resolved.

[0073] In a display device (10) with a portion of the end portion of the display device (10) removed, the ends of the display panel (100), support member (200), and cushion plate (300) may align.

[0074] When a portion of the ends of the display panel (100), the support member (200), and the cushion plate (300) are cut together, the ends of the display device (10) can be aligned without a step difference. Accordingly, the planar dimensions of the display panel (100) and the cushion plate (300) can be formed identically.

[0075] Since the display panel (100) includes an optical film, an encapsulation portion, a pixel array portion, and a display substrate, when a portion of the side area of ​​the display panel (100) is cut, the ends of the optical film, the encapsulation portion, the display substrate, the support member (200), and the cushion plate (300) can all be aligned.

[0076] Alternatively, to eliminate the step difference of the display device (10), a portion of the ends of the display panel (100) and the support member (200), excluding the cushion plate (300), may be cut. Since the cushion plate (300) is not cut, the display panel (100) and the support member (200) may be aligned so that they protrude within a certain level from the cushion plate (300).

[0077] When a portion of the side area of ​​the display panel (100) and the support member (200) is cut with a laser device (500) so that the ends of the display panel (100) and the support member (200) protrude within a certain level, the ends of the display panel (100), the support member (200), and the cushion plate (300) can be aligned. The difference in the degree to which the ends of the cushion plate (300) that is not cut by the laser device (500) are retracted within an error range of 5 μm or less can be seen as alignment.

[0078] Even when the display panel (100) protrudes within a range of 5㎛ from the cushion plate (300) and the ends of the display device (10) are aligned, the effect of reducing damage to the display panel due to external impact can occur similarly to when the ends are aligned.

[0079] Three or more sides of the display device (10), including the upper side, left side, and right side of the display device (10), may be aligned or aligned. Since a flexible circuit board (400) is connected to the bending area formed on the lower side of the display panel (100), it may be difficult to cut the display panel (100). Therefore, one or more of the upper side, left side, and right side areas, excluding the lower side of the display device (10), may be partially cut to align or align the ends.

[0080] FIG. 3 is a cross-sectional view along the line II-II' of FIG. 2a, illustrating another embodiment of the present specification.

[0081] FIG. 3 shows the stacked structure of the display panel (100) and cushion plate (300) of FIG. 2a.

[0082] The display panel (100) includes an optical film (110), an encapsulation portion (120), a pixel array portion (130), and a display substrate (140), and the components may be stacked sequentially from top to bottom.

[0083] The display substrate (140) may be made of a polymer or plastic such as polyimide (PI) or glass, but is not limited thereto.

[0084] A pixel array section (130) may be disposed on a display substrate (140). The pixel array section (130) may include a plurality of subpixels for displaying an image and a driving circuit section for driving the plurality of subpixels. The driving circuit section may include a thin-film transistor layer comprising a gate electrode, an active layer, a source electrode, and a drain electrode. A light-emitting element may be disposed on the thin-film transistor layer. The subpixel includes a light-emitting element, and the light-emitting element may include a first electrode, a light-emitting layer, and a second electrode. The light-emitting element may be disposed corresponding to the display area of ​​the substrate. The light-emitting element may emit light by a high-potential data voltage supplied to the second electrode through the thin-film transistor and a low-potential common voltage supplied to the first electrode. Light generated from the light-emitting element is emitted to the front to realize a desired image.

[0085] An encapsulation portion (120) may be disposed on the light-emitting element. The encapsulation portion (120) can protect the thin-film transistor layer and the light-emitting element from external shocks and prevent oxygen or moisture from penetrating into the thin-film transistor layer and the light-emitting element. The encapsulation portion (120) may include at least one inorganic film and an organic film, but is not limited thereto.

[0086] An optical film (110) may be additionally disposed on the packaging portion (120). The optical film (110) may have a form in which one or more functional layers are laminated, but is not limited thereto.

[0087] For example, the optical film (110) may include an anti-reflection layer, such as a polarizing film, which can prevent reflection of external light and improve outdoor visibility and contrast ratio for an image displayed on a display panel (100).

[0088] As another example, the optical film (110) may further include a barrier layer to prevent moisture or oxygen penetration. The barrier layer may be made of a material with low moisture permeability, such as a polymer material.

[0089] A cover member may be disposed on the front of the display panel (100). The cover member is disposed to cover the front of the display panel (100) and can protect the display panel (100) from external impact.

[0090] An image is displayed on the front of the cover member of the display panel (100). Since the cover member overlaps with the display area that displays the screen, it may be made of a transparent material such as cover glass so that the screen can be displayed. For example, the cover member may be made of transparent plastic material, glass material, or reinforced glass material, but is not limited thereto.

[0091] The pixel array section (130) includes a plurality of subpixels. Each of the plurality of subpixels may be an individual unit that emits light, and a light-emitting element may be disposed in each of the plurality of subpixels. The plurality of subpixels may include a red subpixel, a green subpixel, and a blue subpixel. As another example, the plurality of subpixels may include a red subpixel, a green subpixel, a blue subpixel, and a white subpixel, but are not limited thereto.

[0092] To drive multiple subpixels, a driving circuit section composed of various thin-film transistors and storage capacitors, and signal wiring, etc., may be included. For example, the driving circuit section may be composed of components such as a driving thin-film transistor, a switching thin-film transistor, and a storage capacitor. In addition, the signal wiring may consist of gate wiring and data wiring, but is not limited thereto.

[0093] The driving unit (410) generates a data signal and a gate control signal based on image data and a timing synchronization signal supplied from an external host driving system. The driving circuit supplies the data signal to the data wiring of each pixel through the display pad unit and can supply the gate control signal to the gate driving circuit unit.

[0094] Since the drive unit (410) generates high heat, it may be necessary to effectively provide a heat dissipation effect to the drive unit (410). For example, the drive unit (410) can be effectively heat dissipated by the cushion plate (300).

[0095] In the case of an organic light-emitting display device, high voltage must be applied to the light-emitting layer to emit light, so high heat may be generated compared to a liquid crystal display device. Accordingly, since the cushion plate (300) can be positioned between the display panel (100) and the driving unit (410), heat generated from the display panel (100) as well as the driving unit (410) can be effectively dissipated.

[0096] A cushion plate (300) placed below a display panel (100) may include a porous member (320), a first adhesive member (310), a first reinforcing plate (332), and a second adhesive member (312).

[0097] The porous member (320) may include a metal structure (322) having a metal as the main component and a plurality of pores (324) disposed inside the metal structure (322). For example, the metal structure (322) may be composed of a metal as the main component. The porous member (320) may be a porous metal structure having a plurality of pores (324) inside, and the porous member (320) may be a metal foam.

[0098] A metal structure (322) composed mainly of metal can dissipate high-temperature heat generated from a display panel (100) or a driving unit (410), and the heat dissipation function can be further enhanced by the pores (324) formed inside the porous member (320). In addition, since the pores (324) inside the metal structure (322) provide a cushioning function, they can effectively absorb shocks generated from the outside. For example, the pores (324) inside the metal structure (322) have excellent shock absorption capabilities against instantaneous shocks from the outside.

[0099] The porosity of the porous member (320) having a plurality of pores (324) is 40 to 80%, and the size of each hole may be 20 to 25 μm. If the porosity is lowered, the rigidity increases, but the heat dissipation effect may decrease. Conversely, if the porosity is higher, the heat dissipation effect increases, but it may be difficult to maintain the desired rigidity. The porosity may be the ratio of the area occupied by the plurality of pores (324) per unit area in the porous member (320).

[0100] The porous member (320) may be formed by, for example, the following manufacturing method, but is not limited thereto.

[0101] The porous member (320) can be formed by sintering a precursor of the porous member containing metal powder. The precursor of the porous member may be a precursor before a process performed to form the porous member (320), such as sintering.

[0102] For example, a precursor of a porous member can be formed using a slurry comprising metal powder, a dispersant, and a binder.

[0103] The metal powder may be a mixture of one or more metal powders among copper powder, nickel powder, iron powder, SUS powder, molybdenum powder, silver powder, platinum powder, gold powder, aluminum powder, chromium powder, indium powder, tin powder, magnesium powder, phosphorus powder, zinc powder, and manganese powder, or an alloy powder of one or more metals, but is not limited thereto.

[0104] For example, alcohol can be used as a dispersant, but is not limited to this.

[0105] In this case, the alcohol may be a monohydric alcohol having 1 to 20 carbon atoms, such as methanol, ethanol, propanol, pentanol, octanol, ethylene glycol, propylene glycol, pentanol, 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol, glycerol, texanol, or terpineol, or a dihydric alcohol having 1 to 20 carbon atoms, such as ethylene glycol, propylene glycol, hexanediol, octanediol, or pentanediol, or a polyhydric alcohol with more than 1 carbon atoms, but is not limited thereto.

[0106] The type of binder is not particularly limited and can be selected depending on the type of metal component or dispersant used in the manufacture of the slurry.

[0107] For example, the binder may be an alkyl cellulose having 1 to 8 carbon atoms, such as methyl cellulose or ethyl cellulose, a polyalkylene carbonate having 1 to 8 carbon atoms, such as polypropylene carbonate or polyethylene carbonate, or a polyvinyl alcohol-based binder such as polyvinyl alcohol or polyvinyl acetate, but is not limited thereto.

[0108] After forming a slurry containing the metal powder, dispersant, and binder as described above, a precursor of a porous member can be formed by injecting the slurry into a mold having a predetermined shape or by coating the slurry onto a substrate.

[0109] The porous member precursor formed in this way can be formed into a porous member (320) through a sintering process.

[0110] A first reinforcing plate (332) may be placed on the porous member (320).

[0111] The first reinforcing plate (332) can be connected to the porous member (320) through the first adhesive member (310).

[0112] The first adhesive member (310) is laminated to a certain thickness on one side of the porous member (320) so that the first reinforcing plate (332) can be directly attached or fixed to the porous member (320).

[0113] The first adhesive member (310) may be a flat adhesive containing an adhesive component, or an adhesive with an embossed pattern formed to prevent bubbles from forming. The first adhesive member (310) is not limited thereto and may be formed in various materials and shapes.

[0114] The first reinforcing plate (332) can be formed in the form of a metal plate or metal sheet containing components such as stainless steel (SUS), copper (Cu), aluminum (Al), and amorphous alloy.

[0115] In the case of stainless steel (SUS), since it has high strength, elasticity, and corrosion resistance, it can possess sufficient rigidity and elasticity even when formed into a thin thickness.

[0116] In addition, the amorphous alloy may be a metal material having a non-periodic atomic arrangement structure. The amorphous alloy may be an alloy having superior properties such as high strength, corrosion resistance, wear resistance, and non-magnetism compared to crystalline alloys. In the embodiments of this specification, the first reinforcing plate (332) may use an amorphous alloy comprising nickel (Ni), silicon (Si), and boron (B), but is not limited thereto.

[0117] When the first reinforcing plate (332) is formed from an amorphous alloy, the first reinforcing plate (332) has high strength and non-magnetic characteristics, so it can have the effect of not only improving rigidity but also stably driving the display panel (100) driven by an electrical signal.

[0118] The first reinforcing plate (332) improves the rigidity of the porous member (320) and can prevent and disperse impact applied to the porous member (320).

[0119] For instantaneous impacts that are strongly applied in a short period of time, such as when the display device (10) is dropped from a high place or when a heavy object falls onto the display device (10), the impact can be absorbed by a porous member (320) configured in a foam-like shape with a plurality of pores (324) arranged therein. However, if a push impact that is continuously applied to the porous member (320) for a certain period of time is applied, the shape of the porous member (320) may be permanently deformed, and the impact absorption function may be lost.

[0120] Accordingly, to increase the rigidity of the porous member (320) against push impact, a first reinforcing plate (332) may be placed.

[0121] The first reinforcing plate (332) is formed in the form of a metal plate or a metal sheet and has rigidity and elasticity. The first reinforcing plate (332) prevents push shocks transmitted to the porous member (320) and can restore the shape of the porous member (3200) in a short time when the push shocks disappear.

[0122] In addition, when a first reinforcing plate (332) is placed on the upper surface of the porous member (320), the surface irregularities of the porous member (320) can be prevented from being visible from the front of the display device (10), thereby improving the appearance quality of the display device.

[0123] When the first reinforcing plate (332) is formed of a metal such as copper (Cu) or aluminum (Al) which has high electrical conductivity, the electrical conductivity of the porous member (320) is improved, so the discharge function that disperses the charge or electric field can also be improved.

[0124] In order to connect (or attach, fix) the first reinforcing plate (332) to which the porous member (320) is connected to the support member (200) or display panel (100), a second adhesive member (312) may be placed on the first reinforcing plate (332).

[0125] The second adhesive member (312) may have an adhesive component similar to the first adhesive member (310), formed to a certain thickness, or may have an embossed pattern formed thereon. The second adhesive member (312) is not limited thereto and may be formed in various materials and shapes.

[0126] The cushion plate (300), display panel (100), and support member (200), including the first reinforcing plate (332), can prevent damage to the side of the display panel (100) by cutting a portion of the side area with a laser (500). Since the first reinforcing plate (332) is composed of a metal plate or a metal sheet, it may not be easy to cut compared to the porous member (320) containing a plurality of pores (324), the support member (200) composed mostly of plastic material, and the display panel (100).

[0127] Accordingly, the first reinforcing plate (332) can be formed to a thickness of less than a certain thickness and cut with a laser device (500).

[0128] For example, if the first reinforcing plate (332) is made of stainless steel (SUS) material, the first reinforcing plate (332) can be made with a thin thickness of 30 μm or less and can be cut with a laser device (500) together with the display panel (100) and the porous member (320).

[0129] If the first reinforcing plate (332) is formed to be 30㎛ or larger, the rigidity may be further increased, but it may become difficult to cut with a laser (500).

[0130] Accordingly, to increase the rigidity of the first reinforcing plate (332) and to cut with a laser device (500), a plurality of thin reinforcing plates of 30 μm or less can be arranged.

[0131] FIG. 4 is a cross-sectional view along the line II-II' of FIG. 2a, illustrating another embodiment of the present specification.

[0132] Referring to FIG. 4, the cushion plate (300) may further include a second reinforcing plate (334) disposed on the first reinforcing plate (332). Accordingly, the display device (10) may include a porous member (320), a first adhesive member (310), a first reinforcing plate (332), a second adhesive member (312), a second reinforcing plate (334), and a third adhesive member (314). The configuration of the display device (10) is not limited thereto, and it is also possible to add reinforcing plates.

[0133] Since the first reinforcing plate (332) is formed thin so that it can be cut by a laser (500), when a push impact of a certain level or higher is applied, the first reinforcing plate (334) undergoes significant deformation and can transmit the push impact to the porous member (320).

[0134] For example, under conditions such as carrying the display device (10) in a back pocket of pants or carrying it in a bag, the display device (10) may be subjected to a high push impact, and it may be difficult to prevent the push impact from being transmitted to the porous member (320) with only the configuration of the first reinforcing plate (332).

[0135] Accordingly, a second reinforcing plate (334) can be additionally placed on top of the first reinforcing plate (332). The second reinforcing plate (334) can be connected (or fixed, attached) to the first reinforcing plate (332) by placing a second adhesive member (312) on the first reinforcing plate (332). Since the reinforcing plates are formed in multiple numbers, the rigidity and the function of dispersing push impact can be greatly improved.

[0136] For example, even if a high push impact is applied to the second reinforcing plate (334) and the shape of the second reinforcing plate (334) is greatly deformed, the impact is dispersed or prevented again from the first reinforcing plate (332), so that the push impact can be prevented from being transmitted to the porous member (320).

[0137] The second reinforcing plate (334) can be formed in the form of a metal plate or metal sheet containing components such as stainless steel (SUS), copper (Cu), aluminum (Al), and amorphous alloy, just like the first reinforcing plate (332).

[0138] The thickness of the second reinforcing plate (334) can be formed thinly so that it can be cut by a laser device (500).

[0139] For example, if the second reinforcing plate (334) is made of stainless steel (SUS) material, the second reinforcing plate (334) may be made with a thickness of 30 μm or less so that it can be cut with a laser device (500).

[0140] In order to connect (or attach, fix) the second reinforcing plate (334) to the support member (200) or display panel (100), a third adhesive member (314) may be disposed on the second reinforcing plate (334). The third adhesive member (314) may be formed with the same structure as the first adhesive member (310), but is not limited thereto.

[0141] When multiple reinforcing plates are formed, the strength and shock-dispersing functions are improved, but since the display device (10) becomes thicker, the radius of curvature of the bending portion of the flexible circuit board (400) or display panel (100) increases, and the non-display area may increase.

[0142] A structure in which the first adhesive member (310), the second adhesive member (312), and the second reinforcing plate (334) are omitted can also be applied so as to increase rigidity while reducing the thickness of the cushion plate (300).

[0143] FIG. 5 is a cross-sectional view along the line II-II' of FIG. 2a, illustrating another embodiment of the present specification.

[0144] Referring to FIG. 5, a first reinforcing plate (332) can be directly placed (or connected, fixed, or attached) on the upper surface of the porous member (320).

[0145] For example, the first reinforcing plate (332) may be integrally formed on the upper surface of the porous member (320), and may be positioned so that the first reinforcing plate (332) is in direct contact with the upper surface of the porous member (320). It may be integrally formed without an adhesive member between the first reinforcing plate (332) and the porous member (320).

[0146] When the porous member (320) is manufactured on the first reinforcing plate (332), the porous member (320) and the first reinforcing plate (332) can be formed integrally. In order to form the porous member (320) and the first reinforcing plate (332) integrally, a precursor of the porous member containing metal powder is placed on the first reinforcing plate (332), and the precursor of the porous member is sintered so that an integral structure in which the first heat dissipation layer (500) and the porous member (210) are bonded (or connected) can be formed.

[0147] To sinter the porous member precursor on the first reinforcing plate (332), two curing processes may be performed. The first curing may be a pre-curing process for aligning and fixing the position of the porous member precursor and the first reinforcing plate (332). Pre-curing may be a process of applying heat of approximately 100 degrees to the porous member precursor to temporarily align (or align) the position of the porous member precursor and the first reinforcing plate (332). The two curing processes and curing methods are not limiting to the contents of this specification.

[0148] The second curing process may be a main curing process in which a porous member precursor is sintered on the first reinforcing plate (332) to form a porous member (320). The main curing process may be a process in which heat of about 800 to 1000°C is applied to the precursor of the porous member to finally form a porous member (320).

[0149] Through this curing process, a porous member (320) bonded to the first reinforcing plate (332) can be formed.

[0150] Additionally, a first adhesive member (310) for connection with a support member (200) or a display panel (100) may be disposed on the first reinforcing plate (332). The first adhesive member (310) according to the embodiment of the present specification may be an adhesive member disposed at the very bottom.

[0151] Accordingly, in the embodiments of FIGS. 3 and 4, the first adhesive member (310) is disposed between the porous member (320) and the first reinforcing plate (332), but in the embodiment of FIG. 5, the first adhesive member (310) may be disposed between the support member (200) and the first reinforcing plate (332). The first adhesive member (310) disclosed in the embodiments of FIGS. 3, 4, and 5 may be the same material, and furthermore, the first adhesive member (310), the second adhesive member (312), and the third adhesive member (314) disclosed in this specification may all be the same material, but are not limited thereto.

[0152] A support member (200) or a display panel (100) may be placed on the first adhesive member (310).

[0153] A display panel (100) and a porous member (320) can be connected, and a portion of the side area of ​​the display panel (100) and the porous member (320) can be cut with a laser device (500) to form a display device (10).

[0154] According to the embodiments of the present specification, the porous member (320) and the first reinforcing plate (332) are integrally formed, so that the rigidity may be improved and the thickness reduced, but it may be difficult to prevent push impacts exceeding a certain level as in the embodiment of FIG. 3.

[0155] Accordingly, a reinforcing plate may be added as in the embodiment of FIG. 4, but if a reinforcing plate is added, the thickness and non-display area may increase. Therefore, to improve rigidity without adding a reinforcing plate, a coating layer (336) may be formed on the upper surface of the first reinforcing plate (332).

[0156] The coating layer (336) can be formed by coating an alloy of copper (Cu) and nickel (Ni) on the upper surface of the first reinforcing plate (332).

[0157] As a method for forming the coating layer (336), a method of melting an alloy of copper (Cu) and nickel (Ni) and plating it onto the upper surface of the first reinforcing plate (332), or a method of coating it evenly using a squeegee, may be used. The method of forming the coating layer (336) is not limited to this, and various methods may be used.

[0158] The coating layer (336) of copper (Cu) and nickel (Ni) alloy placed on the first reinforcing plate (332) is a material with excellent thermal conductivity, corrosion resistance, and strength, so the strength and thermal conductivity of the first reinforcing plate (332) can be increased.

[0159] Therefore, the strength is improved without increasing the thickness of the cushion plate (300), and the heat generated from the display panel (100) can be effectively transferred to the porous member (320) to dissipate heat.

[0160] FIG. 6 is a cross-sectional view along the line II-II' of FIG. 2a, illustrating another embodiment of the present specification.

[0161] Referring to FIG. 6, the cushion plate (300) may use a compression porous member (321) to improve rigidity.

[0162] The compressed porous member (321) may include a compressed metal structure (326) and a plurality of pores (324) disposed inside the compressed metal structure (326).

[0163] The compressed porous member (321) can be formed by applying vertical pressure to the porous member (320) of FIG. 5 in a press device or assembly process, thereby compressing it into a porous member.

[0164] The thickness of the compressed porous member (321) is reduced due to compression, and the porosity, which is the ratio of the area occupied by a number of pores per unit area in the porous member, can be reduced from approximately 74% before compression to 60% or less after compression.

[0165] As the porosity of the compressed porous member (321) decreases, the density of the compressed metal structure (326) becomes densely formed, increasing the rigidity and effectively blocking push impacts.

[0166] The compression porous member (321) may have a reduced porosity, which may result in a lower shock absorption capacity against instantaneous impact. Accordingly, it is necessary to adjust the degree of compression by considering the environment in which the indicator device (10), such as instantaneous impact and push impact, is applied.

[0167] A first reinforcing plate (332) may be placed on the compression porous member (321) to reinforce rigidity. The first reinforcing plate (332) may be connected to the compression porous member (321) using an adhesive member, or the porous member (321) and the first reinforcing plate (332) may be connected by forming them integrally.

[0168] And, a support member (200) and a display panel (100) can be arranged on the first reinforcing plate (332) to form a display device (10).

[0169] A display device according to an embodiment of the present specification may be described as follows.

[0170] A display device according to an embodiment of the present specification comprises: a display panel on which an image is displayed; and a cushion plate disposed below the display panel; wherein the cushion plate comprises a porous member, a first reinforcing plate, and a first adhesive member, and the ends of the display panel and the cushion plate may coincide or be aligned.

[0171] According to some embodiments of the present specification, the planar dimensions of the display panel and the cushion plate may be the same.

[0172] According to some embodiments of the present specification, the first reinforcing plate may comprise stainless steel (SUS) or an amorphous alloy.

[0173] According to some embodiments of the present specification, the cushion plate may further include a second reinforcing plate disposed on a first reinforcing plate.

[0174] According to some embodiments of the present specification, a coating layer of a copper (Cu) and nickel (Ni) alloy may be disposed on the first reinforcing plate.

[0175] According to some embodiments of the present specification, the porous member may include a conductive metal and a plurality of pores located within the conductive metal.

[0176] According to some embodiments of the present specification, the porous member is a compressible porous member, and the area ratio occupied by a plurality of pores per unit area may be 60% or less.

[0177] According to some embodiments of the present specification, a cushion plate may have a porous member, a first reinforcing plate, and a first adhesive member sequentially laminated.

[0178] According to some embodiments of the present specification, a first reinforcing plate may be directly disposed on the upper surface of a porous member.

[0179] A method for manufacturing a display device according to the present specification may include: a step of placing a precursor of a porous member comprising metal powder; a step of sintering the precursor of the porous member to form a porous member placed on a first reinforcing plate; a step of placing a first adhesive member on the first reinforcing plate; a step of placing a display panel on the first adhesive member; and a step of cutting a portion of the side area of ​​the display panel and the porous member with a laser.

[0180] 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 to 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 below, 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

[0181] 10 : Display device 100 : Display panel 110 : Optical film 120 : Encapsulation part 130: Pixel array section 140: Display board 200 : Support member 300 : Cushion plate 310: First adhesive member 312: Second adhesive member 314: Third adhesive member 332: First reinforcing plate 334: Second reinforcing plate 336: Coating layer 320: Porous member 322: Metal structure 324 : Pores 400 : Flexible circuit board 410 : Driving unit 500 : Laser device (laser)

Claims

Claim 1 A display device comprising: a display panel on which an image is displayed; a support member disposed below the display panel; and a cushion plate disposed below the support member; wherein the cushion plate comprises a porous member, a first adhesive member, a first reinforcing plate, a second adhesive member, and a second reinforcing plate sequentially stacked, and wherein the first reinforcing plate and the second reinforcing plate comprise stainless steel (SUS) or an amorphous alloy, and wherein the ends of the display panel, the support member, and the cushion plate coincide, or the end of the display panel and the end of the support member are aligned with the end of the cushion plate. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A display device according to claim 1, wherein a coating layer of a copper (Cu) and nickel (Ni) alloy is disposed on the first reinforcing plate. Claim 6 A display device according to claim 1, wherein the porous member comprises a conductive metal and a plurality of pores located within the conductive metal. Claim 7 In claim 6, the porous member is a compression porous member, and the area ratio occupied by the plurality of pores per unit area is 60% or less, a display device. Claim 8 In claim 1, the cushion plate is a display device in which the porous member, the first reinforcing plate, and the first adhesive member are sequentially laminated. Claim 9 A display device according to claim 8, wherein the first reinforcing plate is positioned to be in direct contact with the upper surface of the porous member. Claim 10 delete Claim 11 A display device according to claim 1, wherein the display panel comprises a display substrate, a pixel array portion, an encapsulation portion, and an optical film, and the end of the display substrate, the end of the pixel array portion, the end of the encapsulation portion, and the end of the optical film coincide with the end of the support member and the end of the cushion plate. Claim 12 A display device according to claim 1, wherein the display panel comprises a display substrate, a pixel array portion, an encapsulation portion, and an optical film, and the end of the display substrate, the end of the pixel array portion, the end of the encapsulation portion, and the end of the optical film coincide with the end of the support member and are aligned with the end of the cushion plate.

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