Display device

Abstract

The invention discloses a display device. The display device includes: a display panel; the composite material panel is combined with the display panel; and a fastening member coupled to the composite panel, the composite panel includes: a front skin forming a front surface of the composite panel; a rear skin forming a back surface of the composite panel and facing the front skin; a core located between the front skin and the rear skin and including fibers; and a fastening hole formed to penetrate through the front skin, the rear skin, and the core. The fastening member includes: a shaft body inserted into the fastening hole; and a head which is connected to the shaft main body and is pressed into either the front skin or the rear skin. Any one of the front skin and the rear skin may be in contact with a side of the head.

Description

Technical Field

[0001] The invention relates to a display device. Background Art

[0002] With the development of information society, the demand for display devices has been continuously increasing in various forms. Correspondingly, various display devices such as LCD (Liquid Crystal Display Device), PDP (Plasma Display Panel), ELD (Electro luminescent Display), VFD (Vacuum Fluorescent Display), OLED (Organic Light Emitting Diode) have been studied and used in recent years.

[0003] Among them, a display device using an organic light emitting diode (OLED) has an advantage of being superior in brightness and viewing angle compared to a liquid crystal display device, and can be ultra-thin because a backlight unit is not required.

[0004] Recently, much research has been conducted on ensuring the rigidity and structural stability of large-screen ultra-thin display devices. Summary of the invention

[0005] The present invention aims to solve the aforementioned problems and other problems.

[0006] Another object of the present invention is to ensure the structural rigidity of a large-screen ultra-thin display device.

[0007] Another object of the present invention may be to ensure the structural stability of the display device.

[0008] Another object of the present invention may be to improve the flatness of a frame of a display device.

[0009] Another object of the present invention may be to improve the bonding structure of a display device.

[0010] Another object of the present invention may be to improve the durability and stability of the bonding structure between the composite material panel and the fastening member.

[0011] A display device according to one aspect of the present invention for achieving the above-mentioned purpose includes: a display panel; a composite material panel combined with the display panel; and a fastening member combined with the composite material panel; the composite material panel includes: a front skin forming the front side of the composite material panel; a rear skin forming the back side of the composite material panel and facing the front skin; a core located between the front skin and the rear skin and including fibers; and a fastening hole formed by passing through the front skin, the rear skin and the core; the fastening member includes: an axis body inserted into the fastening hole; and a head connected to the axis body and pressed into either the front skin or the rear skin; either the front skin or the rear skin can contact the side of the head.

[0012] The display device of the present invention has the following effects.

[0013] According to at least one of the embodiments of the present invention, the structural rigidity of a large-screen ultra-thin display device can be ensured.

[0014] According to at least one of the embodiments of the present invention, the structural stability of the display device can be ensured.

[0015] According to at least one of the embodiments of the present invention, the flatness of a frame of a display device can be improved.

[0016] According to at least one of the embodiments of the present invention, the coupling structure of a display device can be improved.

[0017] According to at least one of the embodiments of the present invention, it is possible to improve the durability and stability of a bonding structure between a composite material panel and a fastening member.

[0018] From the following detailed description, the scope of the additional application of the present invention will become apparent. However, those skilled in the art can clearly understand the various changes and modifications within the thought and scope of the present invention, and therefore it should be understood that the specific embodiments such as the detailed description and the preferred embodiments of the present invention are only given by way of example. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figures 1 to 49 FIG. 1 is a diagram showing an example of a display device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The embodiments disclosed in this specification will be described in detail with reference to the drawings. The same or similar components are denoted by the same reference numerals regardless of the figure numbers, and repeated description thereof will be omitted.

[0021] The suffixes "module" and "unit" for the constituent elements used in the following description are given or used interchangeably only for the convenience of writing the specification, and do not have meanings or functions that distinguish one from another.

[0022] When describing the embodiments disclosed in this specification, if it is determined that the specific description of the related known technology may make the gist of the embodiments disclosed in this specification unclear, the detailed description thereof will be omitted. In addition, the drawings are only used to help understand the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the drawings, and should be understood to include all changes, equivalents and substitutes within the ideas and technical scope of this specification.

[0023] Terms including ordinal numbers such as "first" and "second" may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

[0024] When a certain component is mentioned as being "connected" or "coupled" to another component, it should be understood that it may be directly connected to or coupled to the other component, but other components may exist between them. Conversely, if a certain component is mentioned as being "directly connected" or "directly coupled" to another component, it should be understood that there are no other components between them.

[0025] Unless the context clearly indicates otherwise, an expression in the singular includes an expression in the plural.

[0026] Although the embodiments are described with reference to specific figures, reference numerals not shown in the specific figures may be referred to as needed, and reference numerals not shown in the specific figures may be used when the reference numerals appear in the other figures.

[0027] Reference Figure 1 , the display device 100 may include a display panel 110. The display panel 110 may display an image.

[0028] The display device 100 may include: a first long side (First Long Side) LS1; a second long side (Second Long Side) LS2 opposite to the first long side LS1; a first short side (First Short Side) SS1 adjacent to the first long side LS1 and the second long side LS2; and a second short side (Second Short Side) SS2 opposite to the first short side SS1.

[0029] For ease of explanation, the lengths of the first long side LS1 and the second long side LS2 are shown to be greater than those of the first short side SS1 and the second short side SS2 , but the lengths of the first long side LS1 and the second long side LS2 may be substantially the same as those of the first short side SS1 and the second short side SS2 .

[0030] The direction parallel to the long sides LS1 and LS2 of the display device 100 may be referred to as a first direction DR1 or a left-right direction LR. The direction parallel to the short sides SS1 and SS2 of the display device 100 may be referred to as a second direction DR2 or an up-down direction UD.

[0031] The direction perpendicular to the long sides LS1, LS2 and the short sides SS1, SS2 of the display device 100 may be referred to as a third direction DR3 or a front-rear direction FR. Here, the direction in which the display panel 110 displays an image may be referred to as a front direction, and the opposite direction may be referred to as a rear direction.

[0032] In the following, the display panel 110 is described by taking a display panel using an organic light emitting diode (OLED) as an example, but the display panel 110 applicable to the present invention is not limited thereto.

[0033] The display panel 110 forms the front of the display device 100 and can display an image to the front. The display panel 110 can output an image by dividing the image into a plurality of pixels and matching the color, brightness and saturation of each pixel. The display panel 110 can be divided into an active area (active area) that displays an image and a de-active area (de-active area) that does not display an image. The display panel 110 can generate light corresponding to red, green, or blue according to a control signal.

[0034] Reference Figure 2 The composite material panel 130 may include a core 131, a front skin 132, and a rear skin 133. The core 131, the front skin 132, and the rear skin 133 may be combined with each other. The composite material panel 130 may be referred to as a fiber composite panel 130, a fiber composite plate 130, a composite material plate 130, or an intermediate frame 130.

[0035] The front skin 132 may form a front side of the composite panel 130. The rear skin 133 may form a rear side of the composite panel 130. The front skin 132 and the rear skin 133 may include a metal material.

[0036] For example, the front skin 132 and the rear skin 133 may be galvanized iron. As another example, the front skin 132 and the rear skin 133 may include aluminum (Al).

[0037] For example, the thickness of the front skin 132 and the rear skin 133 may be 0.2 to 0.5 mm. As another example, the front skin 132 and the rear skin 133 formed of galvanized steel sheets may be 0.27 mm. As another example, the front skin 132 and the rear skin 133 including aluminum may be 0.5 mm.

[0038] The front skin 132 and the rear skin 133 may face each other across the core 131 described later. The core 131 may be located between the front skin 132 and the rear skin 133. The core 131 may include fiber. The core 131 may be formed of a composite material. The core 131 may include a main fiber and a binder fiber. The binder fiber may be mixed between the main fibers.

[0039] The front skin 132 and / or the rear skin 133 may be bonded to the core 131 by a hot melt process. A hot melt sheet may be disposed between the front skin 132 and the core 131, and a hot melt sheet may be disposed between the rear skin 133 and the core 131. The hot melt sheet may be a film. For example, the hot melt sheet may be a film of EVA, acrylic resin, polyurethane, etc. having a thickness of more than 50 microns. After the core 131 is disposed between the front skin 132 and the rear skin 133 using the hot melt sheet, it may be rolled and bonded at 190 degrees Celsius for more than 1 minute.

[0040] This can improve the flexural rigidity and / or torsional rigidity of the display device.

[0041] Reference Figure 3 and Figure 4 The composite panel 130 may be manufactured by a process of pressing the front skin 132 and the rear skin 133 onto the core 131 using a plurality of rollers, and such a process may be referred to as an R2R (Roll-to-Roll) process.

[0042] Reference Figure 3, as the pinch roller Ra that performs the function of a driving motor rotates, the front skin 132 is untied from the front roller Da, the rear skin 133 is untied from the rear roller Db, and the core 131 can be moved through the feeding roller Rd. In addition, the first adhesive 134a used to bond the front skin 132 to the core 131 can be untied from the first roller Dc. In addition, the second adhesive 134b used to bond the rear skin 133 to the core 131 can be untied from the second roller Db. In this case, the front skin 132, the first adhesive 134a, the core 131, the second adhesive 134b and the rear skin 133 can be stacked in the above order and can be guided by the guide roller Rc in the direction toward the oven Ov. The adhesives 134a, 134b can be hot melt sheets 134a, 134b.

[0043] The first adhesive 134a and the second adhesive 134b are melted in the oven Ov, and the front skin 132 and the rear skin 133 can be respectively combined with the core 131. For example, the melting point of the first adhesive 134a and the second adhesive 134b can be about 150° C., and the ambient temperature in the oven Ov can be about 200° C. For example, the peel-off force of the first adhesive 134a and the second adhesive 134b can be about 10 kgf or more.

[0044] The front skin 132, the core 131, and the rear skin 133 that have passed through the oven Ov can be guided to the pressing roller Rb and pressed by the pressing roller Rb as the pinch roller Ra rotates. As a result, the bonding force between the front skin 132, the core 131, and the rear skin 133 can be further increased. After passing through the pinch roller Ra, the front skin 132, the core 131, and the rear skin 133 that are bonded to each other can be cut by the cutter Ct to produce a composite material panel 130 of a certain size.

[0045] Reference Figure 4 , the pressing roller Rb or the pinch roller Ra may contact the outer surface of each of the front skin 132 and the rear skin 133. If the pressing roller Rb or the pinch roller Ra rotates, the composite panel 130 may move along the length direction (i.e., the left-right direction LR) of the core 131. At this time, the front skin 132 and the rear skin 133 may be sequentially combined from one end of the core 131 to the other end in the length direction of the core 131.

[0046] In addition, the front skin 132 and the rear skin 133 of the composite material panel 130 can be formed flat. That is, since the back surface of the rear skin 133 forming the back surface of the display device 100 is formed flat, it is easy to perform additional operations such as painting or sticking a sticker on the back surface of the rear skin 133 for aesthetic appearance.

[0047] On the other hand, in addition to using reference Figure 3 and Figure 4 In addition to the R2R process used to flatly form the front skin 132 and the rear skin 133, the core 131 and the rear skin 133 may be combined by stacking the front skin 132, the core 131 and the rear skin 133 in sequence and then combining them.

[0048] Reference Figure 5 , the composite material panel 130 may include a flat plate portion 130P, a receiving portion 137, and an outer profile portion 135. The outer profile portion 135 may be formed at the periphery of the flat plate portion 130P. The first outer profile portion 135a may be formed along the upper edge of the flat plate portion 130P, the second outer profile portion 135b may be formed along the left side of the flat plate portion 130P, the third outer profile portion 135c may be formed along the lower edge of the flat plate portion 130P, and the fourth outer profile portion 135d may be formed along the right side of the flat plate portion 130P. The outer profile portion 135 may be formed by stamping the flat plate portion 130P. The outer profile portion 135 may be lowered from the flat plate portion 130P to form a step. The thickness of the flat plate portion 130P may be greater than the thickness of the outer profile portion 135.

[0049] The cable hole 136 can penetrate the front skin 132 of the receiving portion 137 (see Figure 2 ) and rear skin 133 (refer to Figure 2 ). The cable hole 136 may be formed in the accommodation portion 137 adjacent to the lower side of the flat portion 130P. There may be a plurality of cable holes 136. The first cable hole 136a may be disposed adjacent to the second cable hole 136b.

[0050] The accommodation portion 137 may be formed between the flat plate portion 130P and the third outer profile portion 135c adjacent to the lower side of the flat plate portion 130P. The accommodation portion 137 may be plural. The first accommodation portion 137a may be located between the first cable hole 136a and the second short side SS2. The second accommodation portion 137b may be located between the second cable hole 136b and the first short side SS1. The accommodation portion 137 may be formed by stamping the flat plate portion 130P. The accommodation portion 137 may be lowered from the flat plate portion 130P and / or the outer profile portion 135c to form a step.

[0051] Reference Figure 6, the receiving portion 137 may be formed by punching the flat plate portion 130P. The front skin 132 of the receiving portion 137 may form a step D1 that becomes lower from the front skin 132 of the flat plate portion 130P. The rear skin 133 of the receiving portion 137 may form a step D2 that becomes higher from the rear skin 133 of the flat plate portion 130P. At this time, the height of the step D1 that becomes lower from the front skin 132 of the flat plate portion 130P toward the front skin 132 of the receiving portion 137 may be greater than the height of the step D2 that becomes higher from the rear skin 133 of the flat plate portion 130P toward the rear skin 133 of the receiving portion 137. The thickness T1 of the flat plate portion 130P may be greater than the thickness T2 of the receiving portion 137.

[0052] When the front skin 132 of the flat plate portion 130P is pressed toward the rear skin 133, the core 131 of the composite panel 130 can absorb external force. The magnitude of the external force applied to the front skin 132 of the flat plate portion 130P can be greater than the magnitude of the external force applied to the rear skin 133 of the flat plate portion 130P. The core 131 of the composite panel 130 can not only ensure rigidity but also absorb impact.

[0053] The thickness T4 of the third outer profile portion 135c may be greater than the thickness T2 of the receiving portion 137. A step D2 that becomes higher from the rear skin 133 of the third outer profile portion 135c toward the rear skin 133 of the receiving portion 137 may be formed. The height of the step D2 of the rear skin 133 of the third outer profile portion 135c and the rear skin 133 of the receiving portion 137 may be the same as the height of the step D2 of the rear skin 133 of the receiving portion 137 and the rear skin 133 of the flat plate portion 130P.

[0054] The protruding pad 138 may be formed by protruding from the front skin 132 of the third outer profile portion 135c. The front skin 132 of the protruding pad 138 may form a step D4 that becomes lower toward the front skin 132 of the third outer profile portion 135c. The height of the step D4 formed by the third outer profile portion 135c and the protruding pad 138 may be smaller than the heights of the steps D1 and D2 formed by the flat plate portion 130P and the receiving portion 137. A step D3 that becomes lower from the front skin 132 of the protruding pad 138 toward the front skin 132 of the receiving portion 137 may be formed. The thickness T3 of the protruding pad 138 may be greater than the thickness T4 of the third outer profile portion 135c, may be smaller than the thickness T1 of the flat plate portion 130P, and may be smaller than the thickness T2 of the receiving portion 137.

[0055] The fastening groove H may protrude from the rear skin 133 of the receiving portion 137. The fastening groove H may be recessed in the front skin 132 of the receiving portion 137, and may protrude from the rear skin 133 of the receiving portion 137. The center of the fastening groove H may be penetrated.

[0056] Reference Figure 7 and Figure 8, the fastening groove H may be formed in the flat plate portion 130P. The fastening groove H may be formed by stamping the flat plate portion 130P. The front skin 132 of the fastening groove H may be formed by being recessed from the front skin 132 of the flat plate portion 130P. The rear skin 133 of the flat plate portion 130P and the rear skin 133 of the fastening groove H may form the same plane. The thickness T0 of the fastening groove H may be less than the thickness T1 of the flat plate portion 130P.

[0057] The fastening opening h may be formed in the center of the fastening groove H. The fastening opening h may be formed by punching the fastening groove H. The fastening opening h may be formed by penetrating the front skin 132 and the rear skin 133 of the fastening groove H. The length of the axis SA of the fastening member S may be greater than the thickness T0 of the fastening groove H. The axis SA of the fastening member S may be inserted into the fastening groove H and protrude toward the outside of the rear skin 132 of the fastening groove H through the fastening opening h. The depth D5 of the fastening groove H may be greater than the thickness of the head SH. The head SH of the fastening member S may be hidden in the fastening groove H.

[0058] Reference Fig. 9 , Fig.10 as well as Figure 8 , the PCB board 150 can be combined with the rear of the composite material panel 130. The PCB board 150 can be fixed to the rear of the composite material panel 130 using a fastening member S.

[0059] The PCB board 150 may be formed by stamping a plate 151 including metal. The PCB board 150 may include a horizontal portion 152, a vertical portion 153, a dome portion 154, and a recessed portion 155. The horizontal portion 152 protrudes from the front of the PCB board 150 toward the rear, and may be formed by extending long in the left-right direction of the PCB board 150. The vertical portion 153 protrudes from the front of the PCB board 150 toward the rear, and may be formed by extending long in the up-down direction of the PCB board 150. The dome portion 154 may protrude from the front of the PCB board 150 toward the rear. The recessed portion 155 may be recessed from the rear of the vertical portion 153 and / or the horizontal portion 152 toward the front.

[0060] The shaft SA of the fastening member S may pass through the recess 155 formed in the vertical portion 153 and / or the horizontal portion 152 to combine the composite panel 130 and the PCB board 150. The depth of the recess 155 may be greater than the protruding length of the shaft SA of the fastening member S that passes through the composite panel 130 and protrudes backward.

[0061] Reference Fig.11 and Fig.12 The side frame 140 may be coupled to the outer profile portion 135 adjacent to the flat plate portion 130P (see Figure 5). The side frame 140 may include a first portion 141, a second portion 142, a third portion 143, a fourth portion 144, and a fifth portion 145. The second portion 142 may be bent from the first portion 141 at the first corner C1.

[0062] The first portion 141 may include a horizontal portion 141H and a vertical portion 141V. The horizontal portion 141H of the first portion 141 may be fixed to the first outer profile portion 135a (refer to Figure 5 ). The second portion 142 may include a horizontal portion 142H and a vertical portion 142V. The horizontal portion 142H of the second portion 142 may be fixed to the fourth outer profile portion 135d (refer to Figure 5 )superior.

[0063] A gap G1 may be formed between the horizontal portion 141H of the first portion 141 and the horizontal portion 142H of the second portion 142. The vertical portion 141V of the first portion 141 and the vertical portion 142V of the second portion 142 may be bent and connected. A hole H1 connected to the gap G1 may be formed between the plurality of horizontal portions 141H, 142H adjacent to the plurality of vertical portions 141V, 142V. The size of the hole H1 or the diameter of the hole H1 may be greater than the width of the gap G1. The description of the first corner C1 of the side frame 140 may be applied to the second corner C2 of the side frame 140 in the same manner.

[0064] Reference Fig.11 and Fig.13 The side frame 140 may be coupled to the outer profile portion 135 adjacent to the flat plate portion 130P (see Figure 5 ). The side frame 140 may include a first portion 141, a second portion 142, a third portion 143, a fourth portion 144, and a fifth portion 145. The second portion 142 may be bent from the third portion 143 at a third corner C3.

[0065] The third portion 143 may include a horizontal portion 143H and a vertical portion 143V. The horizontal portion 143H of the third portion 143 may be fixed to the third outer profile portion 135c (refer to Figure 5 ). The second portion 142 may include a horizontal portion 142H and a vertical portion 142V. The horizontal portion 142H of the second portion 142 may be fixed to the fourth outer profile portion 135d (refer to Figure 5 )superior.

[0066] A gap G3 may be formed between the horizontal portion 143H of the third portion 143 and the horizontal portion 142H of the second portion 142. The vertical portion 143V of the third portion 143 and the vertical portion 142V of the second portion 142 may be bent and connected. A hole H3 connected to the gap G3 may be formed between the plurality of horizontal portions 143H, 142H adjacent to the plurality of vertical portions 143V, 142V. The size of the hole H3 or the diameter of the hole H3 may be greater than the width of the gap G3. The description of the third corner C3 of the side frame 140 may be applied to the fourth corner C4 of the side frame 140 in the same manner.

[0067] Reference Fig.11 and Fig.14 The third portion 143 and the fourth portion 144 of the side frame 140 may be located or fixed on the third outer profile portion 135 c. The end of the third portion 143 of the side frame 140 may be combined with the end of the fourth portion 144 of the side frame 140 .

[0068] The horizontal portion 144H of the fourth portion 144 may contact the horizontal portion 143H and the vertical portion 143V of the third portion 143. The vertical portion 144V of the fourth portion 144 may contact the vertical portion 143V of the third portion 143. The vertical portion 143V of the third portion 143 may contact the horizontal portion 144H and the vertical portion 144V of the fourth portion 144. The end of the third portion 143 may be fixed to the end of the fourth portion 144. For example, the end of the third portion 143 and the end of the fourth portion 144 may be fixed by welding.

[0069] Reference Fig.15 , the display panel 110 may be coupled or fixed to the side frame 140. The horizontal portion 143H of the side frame 140 may support the back side of the display panel 110, and the vertical portion 143V may cover the side of the display panel 110. For example, the vertical portion 143V of the third portion 143 of the side frame 140 may cover the side of the lower side of the display panel 110.

[0070] The vertical portion 143V may cover the side of the composite material panel 130. For example, the vertical portion 143V of the third portion 143 of the side frame 140 may cover the side of the third outer profile portion 135c of the composite material panel 130.

[0071] The flexible cable 113 may extend from the lower side of the display panel 110 to between the display panel 110 and the horizontal portion 143H of the side frame 140. The flexible cable 113 may extend to between the back side of the display panel 110 and the composite material panel 130. For example, the flexible cable 113 may be a COF (Chip On Film) 113.

[0072] The source signal substrate 115 may be electrically connected to the flexible cable 113. The source signal substrate 115 may be fixed to one side of the flexible cable 113. For example, the source signal substrate 115 may be an S-PCB (Source PCB: source printed circuit board) 115. The source signal substrate 115 may be located in the receiving portion 137 of the composite material panel 130.

[0073] The flexible cable 113 may be located between the protruding pad 138 of the composite material panel 130 and the display panel 110. The flexible cable 113 may be in contact with the protruding pad 138. Heat generated in the source signal substrate 115 and / or the flexible cable 113 may be released through the protruding pad 138.

[0074] A heat dissipation pad 114 may be disposed between the flexible cable 113 in contact with the protruding pad 138 and the back surface of the display panel 110. The heat dissipation pad 114 may include an elastic material 114a and a conductive film 114b. The core 114a of the heat dissipation pad 114 may be formed of an elastic material, and the conductive film 114b may cover the core 114a of the heat dissipation pad 114. Thus, the flexible cable 113 may maintain a state of contact with the protruding pad 138.

[0075] Reference Fig.16 and Fig.17 The inner frame 210, 230 may be formed on the front and / or back of the composite panel 130. The inner frame 210, 230 may be referred to as a pressed frame 210, 230 or a rigid line 210, 230. The inner frame 210, 230 may be depressed by the front skin 132 and / or the rear skin 133 of the composite panel 130 and compress the core (refer to Figure 2 )131 and formed.

[0076] The inner frames 210, 230 may include a front inner line 210, a rear inner line 230, and a node hole 220. The front inner line 210 may be formed by recessing the front skin 132 of the composite panel 130. The rear inner line 230 may be formed by recessing the rear skin 133 of the composite panel 130.

[0077] The front inner line 210 may include a first front horizontal line 211, a second front horizontal line 212, a third front horizontal line 213, a first front vertical line 214, and a second front vertical line 215. The first front horizontal line 214 may form an upper side of the front inner line 210. The third front horizontal line 213 may form a lower side of the front inner line 210. The second front horizontal line 212 may be located between the first front horizontal line 211 and the third front horizontal line 213. The first front vertical line 214 may connect one end of the first front horizontal line 211, one end of the second front horizontal line 212, and one end of the third front horizontal line 213. The second front vertical line 215 may connect the other end of the first front horizontal line 211, the other end of the second front horizontal line 212, and the other end of the third front horizontal line 213. For example, a first distance L1 between the first front horizontal line 211 and the second front horizontal line 212 may be smaller than a second distance L2 between the second front horizontal line 212 and the third front horizontal line 213.

[0078] The node holes 220 may be formed where the front horizontal lines 211 , 212 , 213 and the front vertical lines 214 , 215 meet. The node holes 220 may be formed through the front skin 132 , the core 131 , and the rear skin 133 of the composite panel 130 .

[0079] The rear inner line 230 may include a first rear horizontal line 231, a second rear horizontal line 232, a third rear horizontal line 233, a first rear vertical line 234, and a second rear vertical line (see Fig.24 ) 235. The first rear horizontal line 234 may form an upper side of the rear inner line 230. The third rear horizontal line 233 may form a lower side of the rear inner line 230. The second rear horizontal line 232 may be located between the first rear horizontal line 231 and the third rear horizontal line 233. The first rear vertical line 234 may connect one end of the first rear horizontal line 231, one end of the second rear horizontal line 232, and one end of the third rear horizontal line 233. The second rear vertical line (refer to Fig.24 ) 235 may connect the other end of the first rear horizontal line 231, the other end of the second rear horizontal line 232, and the other end of the third rear horizontal line 233. For example, the third distance L3 between the first rear horizontal line 231 and the second rear horizontal line 232 may be smaller than the fourth distance L4 between the second rear horizontal line 232 and the third rear horizontal line 233.

[0080] The node holes 220 may be formed where the rear horizontal lines 231 , 232 , 233 and the rear vertical lines 234 , 235 meet. The node holes 220 may be formed through the front skin 132 , the core 131 , and the rear skin 133 of the composite panel 130 .

[0081] The length of the rear inner wire 230 may be smaller than the length of the PCB board 150. The width of the rear inner wire 230 may be smaller than the width of the PCB board 150. The PCB board 150 may cover the rear inner wire 230.

[0082] As a result, the flexural rigidity and / or torsional rigidity of the composite material panel 130 can be improved.

[0083] Reference Fig.18 The node holes 220 may be plural in number. The plural node holes 220 may include a first node hole 221 , a second node hole 222 , a third node hole 223 , a fourth node hole 224 , a fifth node hole 225 , and a sixth node hole 226 .

[0084] The first node hole 221 may be located at a corner C2 formed by the first horizontal lines 211 , 231 and the first vertical lines 214 , 234 . The first node hole 221 may be formed through the composite panel 130 at the corner C2 of the first horizontal lines 211 , 231 and the first vertical lines 214 , 234 .

[0085] The second node hole 222 may be located at a corner C1 formed by the first horizontal lines 211 , 231 and the second vertical lines 212 , 232 . The second node hole 222 may be formed through the composite panel 130 at the corner C1 of the first horizontal lines 211 , 231 and the second vertical lines 212 , 232 .

[0086] The third node hole 223 may be located at a node M2 ​​formed by the second horizontal lines 212, 232 and the first vertical lines 214, 234. The third node hole 223 may be formed through the composite panel 130 at the node M2 ​​of the second horizontal lines 212, 232 and the first vertical lines 214, 234.

[0087] The fourth node hole 224 may be located at a node M1 formed by the second horizontal lines 212, 232 and the second vertical lines 212, 232. The fourth node hole 224 may be formed through the composite panel 130 at the node M1 of the second horizontal lines 212, 232 and the second vertical lines 212, 232.

[0088] The fifth node hole 225 may be located at a corner C4 formed by the third horizontal lines 213, 233 and the first vertical lines 214, 234. The fifth node hole 225 may be formed through the composite panel 130 at the corner C4 of the third horizontal lines 213, 233 and the first vertical lines 214, 234.

[0089] The sixth node hole 226 may be located at a corner C3 formed by the third horizontal lines 213, 233 and the second vertical lines 212, 232. The sixth node hole 226 may be formed through the composite panel 130 at the corner C3 of the third horizontal lines 213, 233 and the second vertical lines 212, 232.

[0090] Thus, not only the bending rigidity and / or torsional rigidity of the composite material panel 130 can be improved, but also the flatness of the display panel 110 combined with the composite material panel 130 can be improved.

[0091] Reference Fig.19 , the size of the sixth node hole 226 may be greater than the width of the third horizontal line 213, 233 and / or the second vertical line 215, 235. For example, when the sixth node hole 226 is a quadrilateral, the width A, B of the sixth node hole 226 may be greater than the width W of the third horizontal line 213, 233 and / or the second vertical line 215, 235. As another example, when the sixth node hole 226 is a circle, the diameter of the sixth node hole 226 may be greater than the width of the third horizontal line 213, 233 and / or the second vertical line 215, 235. The description of the sixth node hole 226 may be applicable to the first node hole 221, the second node hole 222 and / or the fifth node hole 225.

[0092] Reference Fig. 20 , the size of the fourth node hole 224 may be greater than the width of the second horizontal line 212, 232 and / or the second vertical line 215, 235. For example, when the fourth node hole 224 is a quadrilateral, the width A, B of the fourth node hole 224 may be greater than the width of the second horizontal line 212, 232 and / or the second vertical line 215, 235. As another example, when the fourth node hole 224 is circular, the diameter of the fourth node hole 224 may be greater than the width of the second horizontal line 212, 232 and / or the second vertical line 215, 235. The description of the fourth node hole 224 may also be applicable to the third node hole 223.

[0093] Reference Fig.21 The front inner line 210 may be formed in the composite panel 130 as the core 131 is compressed and the front skin 132 is recessed. The rear inner line 230 may be formed in the composite panel 130 as the core 131 is compressed and the rear skin 133 is recessed.

[0094] The front inner line 210 and the rear inner line 230 may be symmetrical with respect to the core 131. For example, the width W of the front inner line 210 may be substantially the same as the width W of the rear inner line 230. As another example, the depth D10 of the front inner line 210 may be substantially the same as the depth D11 of the rear inner line 230.

[0095] A compressed area PA where the core 131 is compressed may be formed between the front inner line 210 and the rear inner line 230. The compressed area PA of the core 131 may have a density greater than a density of a non-compressed area of ​​the core 131.

[0096] As a result, the flexural rigidity and / or torsional rigidity of the composite material panel 130 can be improved.

[0097] Reference Fig. 22 The bonding member AD may be disposed on the flat plate portion 130P of the composite material panel 130. The bonding member AD may be bonded to the front skin 132 of the composite material panel 130. There may be a plurality of bonding members AD.

[0098] The first adhesive member AD1 may be fixed to the first portion 141 of the side frame 140. The first adhesive member AD1 may extend long along the length direction of the first portion 141 of the side frame 140. The second adhesive member AD2 may extend long along the length direction of the second portion 142 of the side frame 140 and may be fixed to the second portion 142. The third adhesive member AD3 may extend long along the second portion 142 of the side frame 140, be parallel to the second portion 142, and be fixed to the flat plate portion 130P spaced apart from the second adhesive member AD2.

[0099] The fifth adhesive member AD5 may extend long along the length direction of the fifth portion 145 of the side frame 140 and may be fixed to the fifth portion 145. The fourth adhesive member AD4 may extend long along the fifth portion 145 of the side frame 140, be parallel to the fifth portion 145, and be fixed to the flat plate portion 130P spaced apart from the fifth adhesive member AD5.

[0100] The sixth adhesive member AD6 may extend long along the length direction of the first portion 141 of the side frame 140 and be fixed to the flat plate portion 130P apart from the first adhesive member AD1. The fourteenth distance G14 from the first portion 141 of the side frame 140 to the sixth adhesive member AD6 may be smaller than the fifteenth distance G15 from the sixth adhesive member AD6 to the first front horizontal line 211.

[0101] The seventh bonding member AD7 may extend along the length direction of the sixth bonding member AD6 and may be fixed to the flat plate portion 130P between the first front vertical line 214 and the fourth bonding member AD4. The seventh bonding member AD7 may be located between the sixth bonding member AD6 and the ninth bonding member AD9. The sixteenth distance G16 from the fourth bonding member AD4 to one end of the seventh bonding member AD7 may be less than the seventeenth distance G17 from the first front vertical line 214 to the other end of the seventh bonding member AD7.

[0102] The ninth adhesive member AD9 may extend along the length direction of the sixth adhesive member AD6 and may be fixed to the flat plate portion 130P between the first front vertical line 214 and the fourth adhesive member AD4. The ninth adhesive member AD9 may be located between the seventh adhesive member AD7 and the receiving portion 137. An eighteenth distance G18 from the fourth adhesive member AD4 to one end of the ninth adhesive member AD9 may be smaller than a nineteenth distance G19 from the first front vertical line 214 to the other end of the ninth adhesive member AD9.

[0103] The eighth adhesive member AD8 may extend along the length direction of the sixth adhesive member AD6, and may be fixed to the flat plate portion 130P between the second front vertical line 215 and the third adhesive member AD3. The eighth adhesive member AD8 may be located between the sixth adhesive member AD6 and the receiving portion 137. A twentieth distance G20 from the third adhesive member AD3 to one end of the eighth adhesive member AD8 may be less than a twenty-first distance G21 from the second front vertical line 215 to the other end of the eighth adhesive member AD8.

[0104] The tenth bonding member AD10 may extend along the length direction of the sixth bonding member AD6 and may be fixed to the flat plate portion 130P between the second front vertical line 215 and the third bonding member AD3. The tenth bonding member AD10 may be located between the eighth bonding member AD8 and the receiving portion 137. A twenty-second distance G22 from the third bonding member AD3 to one end of the tenth bonding member AD10 may be smaller than a twenty-third distance G23 from the second front vertical line 215 to the other end of the tenth bonding member AD10.

[0105] The eleventh bonding member AD11 may extend long along the length direction of the second front horizontal line 212, and may be fixed to the flat plate portion 130P between the second front horizontal line 212 and the third front horizontal line 213. The twelfth bonding member AD12 may extend long along the length direction of the second front horizontal line 212, and may be located between the first front horizontal line 211 and the second front horizontal line 212. The length of the twelfth bonding member AD12 may be less than the length of the eleventh bonding member AD11.

[0106] The tenth distance G10 between the first front horizontal line 211 and the twelfth bonding member AD12 may be smaller than the eleventh distance G11 between the twelfth bonding member AD12 and the second front horizontal line 212. For example, the tenth distance G10 may be greater than 40 mm. For example, the distance between one end of the twelfth bonding member AD12 and the first front vertical line 214 may be greater than 20 mm. As another example, the distance between the other end of the twelfth bonding member AD12 and the second front vertical line 215 may be greater than 20 mm.

[0107] A twelfth distance G12 between the second front horizontal line 212 and the eleventh adhesive member AD11 may be greater than a thirteenth distance G13 between the eleventh adhesive member AD11 and the third front horizontal line 213. For example, the thirteenth distance G13 may be 40 mm or more.

[0108] The display panel 110 may be coupled or fixed to the composite material panel 130 using the adhesive member AD. Thus, the display panel 110 may be fixed to the composite material panel 130 in a flat manner.

[0109] Reference Fig.23 and Fig.24 , the composite material panel 130 may include a flat plate portion 130P, a receiving portion 137, and an outer profile portion 135. The outer profile portion 135 is formed at the periphery of the flat plate portion 130P and may form an edge of the composite material panel 130. The first outer profile portion 135a may be formed along the upper side of the flat plate portion 130P, the second outer profile portion 135b may be formed along the left side of the flat plate portion 130P, the third outer profile portion 135c may be formed along the lower side of the flat plate portion 130P, and the fourth outer profile portion 135d may be formed along the right side of the flat plate portion 130P. The outer profile portion 135 may be formed by stamping the flat plate portion 130P. The outer profile portion 135 may be lowered from the flat plate portion 130P to form a step. The thickness of the flat plate portion 130P may be greater than the thickness of the outer profile portion 135. The lower side of the flat plate portion 130P may form a curved line.

[0110] The accommodation portion 137 may be formed adjacent to the lower side of the flat plate portion 130P on the third outer profile portion 135c. The accommodation portion 137 may be plural. The first accommodation portion 137a may be located between the first cable hole 136a and the second short side SS2. The second accommodation portion 137b may be located between the second cable hole 136b and the first short side SS1. The first accommodation portion 137a may be connected to the second accommodation portion 137b. The accommodation portion 137 may be formed by stamping the third outer profile portion 135c from the front to the rear. The accommodation portion 137 may form a step that becomes lower from the front of the outer profile portion 135c.

[0111] The cable hole 136 can penetrate the front skin 132 of the receiving portion 137 (see Figure 2 ) and rear skin 133 (refer to Figure 2 ). The cable hole 136 may be formed in the accommodation portion 137 and / or the third outer profile portion 135c adjacent to the lower side of the flat portion 130P. The cable hole 136 may be plural. The first cable hole 136a may be arranged adjacent to the second cable hole 136b.

[0112] The inner frame 210, 230 may be formed on the front and / or back side of the composite panel 130. The inner frame 210, 230 may be referred to as a pressed frame 210, 230 or a rigid line 210, 230. The inner frame 210, 230 may be depressed by the front skin 132 and / or the rear skin 133 of the composite panel 130 and compress the core (refer to Figure 2 )131 and formed.

[0113] The inner frames 210, 230 may include a front inner line 210, a rear inner line 230, and a node hole 220. The front inner line 210 may be formed by recessing the front skin 132 of the composite panel 130. The rear inner line 230 may be formed by recessing the rear skin 133 of the composite panel 130.

[0114] The front inner line 210 may include a first front horizontal line 211, a second front horizontal line 212, a third front horizontal line 213, a first front vertical line 214, and a second front vertical line 215. The first front horizontal line 214 may form an upper side of the front inner line 210. The third front horizontal line 213 may form a lower side of the front inner line 210. The second front horizontal line 212 may be located between the first front horizontal line 211 and the third front horizontal line 213. The first front vertical line 214 may connect one end of the first front horizontal line 211, one end of the second front horizontal line 212, and one end of the third front horizontal line 213. The second front vertical line 215 may connect the other end of the first front horizontal line 211, the other end of the second front horizontal line 212, and the other end of the third front horizontal line 213. For example, a first distance L1 between the first front horizontal line 211 and the second front horizontal line 212 may be smaller than a second distance L2 between the second front horizontal line 212 and the third front horizontal line 213.

[0115] The node holes 220 may be formed where the front horizontal lines 211 , 212 , 213 and the front vertical lines 214 , 215 meet. The node holes 220 may be formed through the front skin 132 , the core 131 , and the rear skin 133 of the composite panel 130 .

[0116] The rear inner line 230 may include a first rear horizontal line 231, a second rear horizontal line 232, a third rear horizontal line 233, a first rear vertical line 234, and a second rear vertical line 235. The first rear horizontal line 231 may form an upper side of the rear inner line 230. The third rear horizontal line 233 may form a lower side of the rear inner line 230. The second rear horizontal line 232 may be located between the first rear horizontal line 231 and the third rear horizontal line 233. The first rear vertical line 234 may connect one end of the first rear horizontal line 231, one end of the second rear horizontal line 232, and one end of the third rear horizontal line 233. The second rear vertical line 235 may connect the other end of the first rear horizontal line 231, the other end of the second rear horizontal line 232, and the other end of the third rear horizontal line 233. For example, the third distance L3 between the first rear horizontal line 231 and the second rear horizontal line 232 may be smaller than the fourth distance L4 between the second rear horizontal line 232 and the third rear horizontal line 233.

[0117] The node holes 220 may be formed where the rear horizontal lines 231 , 232 , 233 and the rear vertical lines 234 , 235 meet. The node holes 220 may be formed through the front skin 132 , the core 131 , and the rear skin 133 of the composite panel 130 .

[0118] The receiving portion 137 may be formed by punching the third outer profile portion 135c from the front to the rear. The receiving portion 137 may be formed as a step that becomes higher from the back side of the third outer profile portion 135c.

[0119] A cut-out portion 139 may be formed on at least a portion of a curve formed along the lower side of the flat plate portion 130P. The cut-out portion 139 may be plural. The first cut-out portion 139a may be aligned with the first receiving portion 137a, and the second cut-out portion 139b may be aligned with the second receiving portion 137b. The cut-out portion 139 may be formed on a line forming a step between the front side of the flat plate portion 130P and the third outer profile portion 135c. The cut-out portion 139 may be formed on a line forming a step between the third outer profile portion 135c and the receiving portion 137.

[0120] Thus, not only the bending rigidity and / or torsional rigidity of the composite material panel 130 can be improved, but also the flatness of the composite material panel 130 can be improved.

[0121] Reference Fig.25 The third outer profile portion 135c may be formed by punching the flat plate portion 130P. The front skin 132 of the third outer profile portion 135c may form a step D5 that is lower than the front skin 132 of the flat plate portion 130P.

[0122] The receiving portion 137 may be formed by punching the third outer profile portion 135c. The front skin 132 of the receiving portion 137 may form a step D6 that becomes lower than the front skin 132 of the third outer profile portion 135c.

[0123] The rear skin 133 of the receiving portion 137 may form a step D2 that becomes higher from the rear skin 133 of the third outer profile portion 135c. For example, the height of the step D6 that becomes lower from the front skin 132 of the third outer profile portion 135c toward the front skin 132 of the receiving portion 137 may be smaller than the height of the step D2 that becomes higher from the rear skin 133 of the third outer profile portion 135c toward the rear skin 133 of the receiving portion 137. The thickness T1 of the flat plate portion 130P may be greater than the thickness T2 of the receiving portion 137. The thickness T4 of the third outer profile portion 135c may be smaller than the thickness T1 of the flat plate portion 130P. The thickness T2 of the receiving portion 137 may be greater than the thickness T4 of the third outer profile portion 135c.

[0124] When the front skin 132 of the flat plate portion 130P is pressed toward the rear skin 133, the core 131 of the composite panel 130 can absorb external force. The magnitude of the external force applied to the front skin 132 of the flat plate portion 130P can be greater than the magnitude of the external force applied to the rear skin 133 of the flat plate portion 130P. The core 131 of the composite panel 130 can not only ensure rigidity but also absorb impact.

[0125] The fastening groove H may protrude from the rear skin 133 of the receiving portion 137. The fastening groove H may be recessed at the front skin 132 of the receiving portion 137, and may protrude from the rear skin 133 of the receiving portion 137. The center of the fastening groove H may be penetrated.

[0126] Reference Fig.26 , the first cut-out portion 139a may include a first slit 139a1 and a second slit 139a2. The first slit 139a1 and / or the second slit 139a2 may extend long in the length direction of the receiving portion 137. The first slit 139a1 may be formed at a boundary of the flat plate portion 130P, a boundary of the third outer profile portion 135c, and / or a boundary of the first receiving portion 137a. The second slit 139a2 may be formed adjacent to the first slit 139a1 at a boundary of the flat plate portion 130P, a boundary of the third outer profile portion 135c, and / or a boundary of the first receiving portion 137a.

[0127] The first slit 139a1 may include an upper side 1391, a left side 1392, a right side 1394, and a lower side 1393. The upper side 1391 may be formed in a step region formed at the lower edge of the flat plate portion 130P. The lower side 1393 may be formed in the first receiving portion 137a adjacent to the upper side of the first receiving portion 137a. The left side 1392 connects the left end of the upper side 1391 and the left end of the lower side 1393, and may be formed in the step region at the lower edge of the flat plate portion 130P, the third outer profile portion 135c, and / or the first receiving portion 137a. The right side 1394 may be formed in a step region formed at the lower edge of the flat plate portion 130P, the third outer profile portion 135c, and / or the first receiving portion 137a. For example, the length of the left side 1392 may be greater than the length of the right side 1394, the upper side 1391 may form a straight line, and the lower side 1393 may include a straight line and a curve.

[0128] The second slit 139a2 may include an upper side 1395, a left side 1396, a right side 1398, and a lower side 1397. The upper side 1395 may be formed at the lower boundary of the flat plate portion 130P. The lower side 1397 may be formed at the first receiving portion 137a adjacent to the upper side of the first receiving portion 137a. The left side 1396 connects the left end of the upper side 1395 and the left end of the lower side 1397, and may be formed at the step area at the lower side of the flat plate portion 130P, the third outer profile portion 135c, and / or the first receiving portion 137a. The right side 1398 may be formed at the step area formed at the lower boundary of the flat plate portion 130P, the third outer profile portion 135c, and / or the first receiving portion 137a. For example, the length of the left side 1396 may be substantially the same as the length of the right side 1398, the upper side 1395 may include a straight line and a curve, and the lower side 1397 may include a straight line and a curve. The upper side 1395 may be parallel to the lower side 1397 .

[0129] Reference Fig. 27 , the second cut-out portion 139b may include a first slit 139b1 and a second slit 139b2. The first slit 139b1 and / or the second slit 139b2 may extend long in the length direction of the receiving portion 137. The first slit 139b1 may be formed at a boundary of the flat plate portion 130P, a boundary of the third outer contour portion 135c, and / or a boundary of the second receiving portion 137b. The second slit 139b2 may be formed adjacent to the first slit 139b1 at a boundary of the flat plate portion 130P, a boundary of the third outer contour portion 135c, and / or a boundary of the second receiving portion 137b.

[0130] The first slit 139b1 may include an upper side 1391, a left side 1392, a right side 1394, and a lower side 1393. The upper side 1391 may be formed in a step region formed at the lower edge of the flat plate portion 130P. The lower side 1393 may be formed in the second receiving portion 137b adjacent to the upper side of the second receiving portion 137b. The left side 1392 connects the left end of the upper side 1391 and the left end of the lower side 1393, and may be formed in the step region at the lower edge of the flat plate portion 130P, the third outer profile portion 135c, and / or the second receiving portion 137b. The right side 1394 may be formed in a step region formed at the lower edge of the flat plate portion 130P, the third outer profile portion 135c, and / or the second receiving portion 137b. For example, the length of the left side 1392 may be less than the length of the right side 1394, the upper side 1391 may form a straight line, and the lower side 1393 may include a straight line and a curve.

[0131] The second slit 139b2 may include an upper side 1395, a left side 1396, a right side 1398, and a lower side 1397. The upper side 1395 may be formed at the lower boundary of the flat plate portion 130P. The lower side 1397 may be formed at the second receiving portion 137b adjacent to the upper side of the second receiving portion 137b. The left side 1396 connects the left end of the upper side 1395 and the left end of the lower side 1397, and may be formed at the step area at the lower side of the flat plate portion 130P, the third outer profile portion 135c, and / or the second receiving portion 137b. The right side 1398 may be formed at the step area formed at the lower boundary of the flat plate portion 130P, the third outer profile portion 135c, and / or the second receiving portion 137b. For example, the length of the left side 1396 may be substantially the same as the length of the right side 1398, the upper side 1395 may include a straight line and a curve, and the lower side 1397 may include a straight line and a curve. The upper side 1395 may be parallel to the lower side 1397 .

[0132] Reference Fig.28 The third outer profile portion 135c may be formed by punching the flat plate portion 130P. The front skin 132 of the third outer profile portion 135c may form a step D5 that is lower than the front skin 132 of the flat plate portion 130P.

[0133] The receiving portion 137 may be formed by punching the third outer profile portion 135c. The front skin 132 of the receiving portion 137 may form a step D6 that becomes lower than the front skin 132 of the third outer profile portion 135c.

[0134] The rear skin 133 of the receiving portion 137 may form a step D2 that becomes higher from the rear skin 133 of the third outer profile portion 135c. For example, the height of the step D6 that becomes lower from the front skin 132 of the third outer profile portion 135c toward the front skin 132 of the receiving portion 137 may be smaller than the height of the step D2 that becomes higher from the rear skin 133 of the third outer profile portion 135c toward the rear skin 133 of the receiving portion 137. The thickness T1 of the flat plate portion 130P may be greater than the thickness T2 of the receiving portion 137. The thickness T4 of the third outer profile portion 135c may be smaller than the thickness T1 of the flat plate portion 130P. The thickness T2 of the receiving portion 137 may be greater than the thickness T4 of the third outer profile portion 135c.

[0135] When the front skin 132 of the flat plate portion 130P is pressed toward the rear skin 133, the core 131 of the composite panel 130 can absorb external force. The magnitude of the external force applied to the front skin 132 of the flat plate portion 130P can be greater than the magnitude of the external force applied to the rear skin 133 of the flat plate portion 130P. The core 131 of the composite panel 130 can not only ensure rigidity but also absorb impact.

[0136] The fastening groove H may protrude from the rear skin 133 of the receiving portion 137. The fastening groove H may be recessed at the front skin 132 of the receiving portion 137, and may protrude from the rear skin 133 of the receiving portion 137. The center of the fastening groove H may be penetrated.

[0137] The first slits 139a1, 139b1 may be formed through the front skin 132, the core 131, and / or the rear skin 133. The second slits 139a2, 139b2 may be formed through the front skin 132, the core 131, and / or the rear skin 133.

[0138] Reference Fig.29 and Fig.30 The outer profile 135 may be formed at the periphery of the flat plate portion 130P. The outer profile 135 may form a step that becomes lower from the flat plate portion 130P. The outer profile 135 may be formed along the core 131 (refer to Figure 2 ) is compressed and the front skin 132 is recessed. The outer profile 135 can also be formed as the core 131 is compressed, the front skin 132 is recessed, and the rear skin 133 is protruded.

[0139] The third outer profile portion 135c may be formed adjacent to the lower side of the flat plate portion 130P. The third outer profile portion 135c forms a step lowered from the flat plate portion 130P, and may be formed at the lower end of the flat plate portion 130P.

[0140] The accommodation parts 137, 137a, 137b may be formed in the third outer contour part 135c. The accommodation parts 137, 137a, 137b may be formed by stamping the flat plate part 130P. The accommodation parts 137, 137a, 137b may form a step that becomes lower from the flat plate part 130P. For example, the accommodation parts 137, 137a, 137b may form the same plane as the third outer contour part 135c. As another example, the accommodation parts 137, 137a, 137b may be formed by stamping the third outer contour part 135c.

[0141] The partition slits SL1 and SL2 may be located at the boundary between the flat plate portion 130P and the receiving portions 137a and 137b. The partition slits SL1 and SL2 may be referred to as partition portions SL1 and SL2. The partition slits SL1 and SL2 may be referred to as cut portions SL1 and SL2. The partition slits SL1 and SL2 may be referred to as partition cutouts SL1 and SL2.

[0142] The separation slits SL1 and SL2 may be formed on an inclined surface of a step that becomes lower from the flat plate portion 130P toward the receiving portions 137a and 137b. The separation slits SL1 and SL2 may be formed by cutting out a portion of the flat plate portion 130P and a portion of the receiving portions 137a and 137b. There may be a plurality of separation slits SL1 and SL2. The plurality of separation slits SL1 and SL2 may include a first slit SL1 and a second slit SL2.

[0143] The first slit SL1 may include a first portion P1, a second portion P2, a third portion P3, a fourth portion P4, a fifth portion P5, a sixth portion P6, a seventh portion P7, and an eighth portion P8. The first portion P1, the second portion P2, and the third portion P3 may form a lower side of the first slit SL1. The fourth portion P4, the fifth portion P5, and the sixth portion P6 may form an upper side of the first slit SL1. The upper side of the first slit SL1 may be parallel to the lower side of the first slit SL1. The seventh portion P7 may connect one end of the upper side and one end of the lower side of the first slit SL1, and the eighth portion P8 may connect the other end of the upper side and the other end of the lower side of the first slit SL1. The seventh portion P7 may be parallel to the eighth portion P8.

[0144] The first portion P1 may be parallel to the third portion P3. The third portion P3 may be separated from the first portion P1. The second portion P2 may connect the first portion P1 and the third portion P3. The fourth portion P4 may be parallel to the sixth portion P6. The sixth portion P6 may be separated from the fourth portion P4. The fifth portion P5 may connect the fourth portion P4 and the sixth portion P6.

[0145] The fourth portion P4, the fifth portion P5, and the sixth portion P6 may form an edge of the flat plate portion 130P. The first portion P1, the second portion P2, and the third portion P3 may form an edge of the receiving portions 137a, 137b. The seventh portion P7 and the eighth portion P8 may form an edge of a step connecting the receiving portions 137a, 137b and the flat plate portion 130P.

[0146] The second distance D2 from the lower side of the accommodation parts 137a, 137b to the third portion P3 may be greater than the first distance D1 from the lower side of the accommodation parts 137a, 137b to the first portion P1.

[0147] The second slit SL2 may include a first portion E1, a second portion E2, a third portion E3, a fourth portion E4, a fifth portion E5, a sixth portion E6, a seventh portion E7, and an eighth portion E8. The first portion E1, the second portion E2, and the third portion E3 may form a lower side of the second slit SL2. The fourth portion E4, the fifth portion E5, and the sixth portion E6 may form an upper side of the second slit SL2. The upper side of the second slit SL2 may be parallel to the lower side of the second slit SL2. The seventh portion E7 may connect one end of the upper side and one end of the lower side of the second slit SL2, and the eighth portion E8 may connect the other end of the upper side and the other end of the lower side of the second slit SL2. The seventh portion E7 may be parallel to the eighth portion E8.

[0148] The first portion E1 may be parallel to the third portion E3. The third portion E3 may be separated from the first portion E1. The second portion E2 may connect the first portion E1 and the third portion E3. The fourth portion E4 may be parallel to the sixth portion E6. The sixth portion E6 may be separated from the fourth portion E4. The fifth portion E5 may connect the fourth portion E4 and the sixth portion E6.

[0149] The fourth portion E4, the fifth portion E5, and the sixth portion E6 may form an edge of the flat plate portion 130P. The first portion E1, the second portion E2, and the third portion E3 may form an edge of the receiving portions 137a, 137b. The seventh portion E7 and the eighth portion E8 may form an edge of a step connecting the receiving portions 137a, 137b and the flat plate portion 130P.

[0150] The second distance D2 from the lower side of the accommodation parts 137a, 137b to the third portion E3 may be greater than the first distance D1 from the lower side of the accommodation parts 137a, 137b to the first portion E1. The first slit SL1 may be symmetrical to the second slit SL2.

[0151] Thus, the situation in which the display panel 110 and the composite material panel 130 are poorly coupled due to the bending of the skins 132 and 133 when the receiving portions 137 a and 137 b are formed can be improved.

[0152] Reference Fig.31 The plurality of separation slits SL1, SL2 may include a first slit SL1, a second slit SL2 and a third slit SL3. The third slit SL3 may extend long and may be separated from the first slit SL1 and the second slit SL2. The third slit SL3 may face the accommodation portions 137a, 137b across the first slit SL1 and the second slit SL2.

[0153] The length L1 of the third slit SL3 may be smaller than the distance between the seventh portion P7 of the first slit SL1 and the seventh portion E7 of the second slit SL2. The width w1 of the third slit SL3 may be smaller than the widths w2, w3 of the first slit SL1 and / or the second slit SL2.

[0154] The third distance D3 from the sixth portion P6 of the first slit SL1 to the third slit SL3 may be smaller than the second distance D2 from the lower side of the accommodation portion 137 a , 137 b to the third portion P3 of the first slit SL1 .

[0155] Thus, the problem of poor bonding between the display panel 110 and the composite material panel 130 caused by bending of the composite material panel 130 can be further improved.

[0156] Reference Fig.32 The fastening member 300 may be coupled to the composite material panel 130. For example, the fastening member 300 may be a PEM nut. The fastening hole H may be formed through the composite material panel 130. The fastening hole H may be formed through the front skin 132, the core 131, and the rear skin 133.

[0157] The fastening member 300 may be inserted into the fastening hole H. The fastening member 300 may be pressed into the composite material panel 130 to be combined therewith. As the composite material panel 130 is combined with the fastening member 300, the composite material panel 130 around the fastening member 300 may be compressed. For example, the rear skin 133 of the composite material panel 130 may be supported by the mold block DB, and the front skin 132 of the composite material panel 130 may be compressed by the punching block PB. As the punching block PB moves toward the mold block DB, the composite material panel 130 and the fastening member 300 may be punched.

[0158] The portion of the front skin 132 of the composite panel 130 that contacts the punch block PB may be recessed as a step becomes lower. The portion of the rear skin 133 of the composite panel 130 that contacts the die block DB may be recessed as a step becomes lower. The core 131 may be compressed as the front skin 132 and the rear skin 133 are punched. The height H2 of the step of the rear skin 133 may be greater than the height H1 of the step of the front skin 132.

[0159] The fastening member 300 may include a head 310, a shaft body 320, a shaft hole 330, and a neck 340. The shaft body 320 may be in a cylindrical shape extending long. The head 310 may be formed at the upper end of the shaft body 320, and the neck 340 may connect the shaft body 320 and the head 310 between the upper end of the shaft body 320 and the head 310. The diameter of the neck 340 may be smaller than the diameter of the shaft body 320, and the diameter of the head 310 may be larger than the diameter of the shaft body 320. The shaft hole 330 may be formed by cutting off the inner side of the shaft body 320 from the lower end of the shaft body 320 toward the head in the length direction of the shaft body 320. Through the shaft hole 330, the shaft body 320 may be formed in a cylinder shape.

[0160] Reference Fig.33 , the fastening member 300 may include a head 310, a shaft body 320, a shaft hole 330, and a neck 340. The shaft body 320 may be in a cylindrical shape extending long. The shaft body 320 may have a diameter A and a length C. A head 310 may be formed at the upper end of the shaft body 320, and the neck 340 may connect the shaft body 320 and the head 310 between the upper end of the shaft body 320 and the head 310. The head 310 may have a diameter I and a thickness D. The diameter B of the neck 340 may be smaller than the diameter A of the shaft body 320, and the diameter I of the head 310 may be larger than the diameter A of the shaft body 320. The thickness E of the head 310 and the neck 340 may be referred to as a combined thickness E.

[0161] The shaft hole 330 may be formed by cutting the inner side of the shaft body 320 from the lower end of the shaft body 320 toward the head along the length direction of the shaft body 320. The shaft body 320 may be formed into a cylinder shape by the shaft hole 330. The shaft hole 330 may have a diameter F and a length G. The length G of the shaft hole 330 may be smaller than the length C of the shaft body 320, and the diameter F of the shaft hole 330 may be smaller than the diameter A of the shaft body 320.

[0162] Reference Fig.34 , the fastening member 300 may include a head 310, a shaft body 320, a shaft hole 330, and a neck 340. The shaft body 320 may be in a cylindrical shape extending long. The shaft body 320 may have a diameter A and a length C. A head 310 may be formed at the upper end of the shaft body 320, and the neck 340 may connect the shaft body 320 and the head 310 between the upper end of the shaft body 320 and the head 310. The head 310 may have a diameter I and a thickness D. The diameter B of the neck 340 may be smaller than the diameter A of the shaft body 320, and the diameter I of the head 310 may be larger than the diameter A of the shaft body 320. The thickness E of the head 310 and the neck 340 may be referred to as a combined thickness E.

[0163] The shaft body 320 may include a main body 320a and a tail 320b. The main body 320a may be connected to the neck 340, and the tail 320b may form the end of the shaft body 320. The tail 320b may face the neck 340 across the main body 320a. The diameter H of the tail 320b may be smaller than the diameter A of the main body 320a. The length C1 of the main body 320a may be greater than the length C2 of the tail 320b.

[0164] The shaft hole 330 may be formed by cutting the inner side of the shaft body 320 from the lower end of the shaft body 320 toward the head 310 along the length direction of the shaft body 320. The shaft body 320 may be formed into a cylinder shape by the shaft hole 330. The shaft hole 330 may have a diameter F and a length G. The length G of the shaft hole 330 may be smaller than the length C of the shaft body 320, and the diameter F of the shaft hole 330 may be smaller than the diameter A of the shaft body 320. The diameter F of the shaft hole 330 may be smaller than the diameter H of the tail 320b.

[0165] Reference Fig.35 and Fig.36 , the thickness D of the head 310 may be less than the thickness ED of the neck 340. The thickness D of the head 310 may correspond to the thickness of the front skin 132. For example, the thickness of the front skin 132 may be 0.5 mm, the thickness of the rear skin 133 may be 0.5 mm, and the thickness of the core 131 may be 3 mm. For example, the thickness ED of the neck 340 may be 1.5 to 2.3 times the thickness D of the head 310. As another example, the thickness ED of the neck 340 may be 2 times the thickness D of the head 310. As another example, the thickness D of the head 310 may be 0.5 mm, and the thickness ED of the neck 340 may be 1 mm. The diameter A of the shaft body 320 may be greater than the diameter B of the neck 340. For example, the difference AB between the diameter A of the shaft body 320 and the diameter B of the neck 340 may be 0.8 mm.

[0166] As reference Fig.32 As described above, as the fastening member 300 is bonded to the composite panel 130, the core 131 around the fastening member 300 is compressed, and the front skin 132 and / or the rear skin 133 may be punched. The front surface of the front skin 132 may form the same plane as the front surface of the head 310 of the fastening member 300. The front skin 132 may contact the side and bottom surfaces of the head 310 of the fastening member 300. The front skin 132 may be pressed between the head 310 and the neck 340 of the fastening member 300.

[0167] The rear skin 133 may face the front skin 132 via the core 131. The rear skin 133 may contact the outer surface of the shaft body 320 of the fastening member 300. The core 131 is compressed between the front skin 132 and the rear skin 133, and is pressed between the top surface of the shaft body 320 and the bottom surface of the head 310, and may contact the side surface of the neck 340. Thus, the horizontal fastening force of the fastening member 300 to the composite material panel 130 can be improved. The horizontal fastening force may be a resistance to the moment applied to the fastening member 300.

[0168] Thus, the fastening member 300 may be firmly bonded to the composite material panel 130 having a small thickness.

[0169] Reference Fig.37 and Fig.38 , the thickness D of the head 310 may be greater than the thickness ED of the neck 340. The thickness D of the head 310 may be greater than the thickness of the front skin 132. For example, the thickness of the front skin 132 may be 0.5 mm, the thickness of the rear skin 133 may be 0.5 mm, and the thickness of the core 131 may be 3 mm. For example, the thickness D of the head 310 may be 1.1 to 1.5 times the thickness ED of the neck 340. As another example, the thickness D of the head 310 may be 1.3 times the thickness ED of the neck 340. As another example, the thickness D of the head 310 may be 1.3 mm, and the thickness ED of the neck 340 may be 1 mm. The diameter A of the shaft body 320 may be greater than the diameter B of the neck 340. For example, the difference AB between the diameter A of the shaft body 320 and the diameter B of the neck 340 may be 0.8 mm.

[0170] As reference Fig.32 As described above, as the fastening member 300 is bonded to the composite panel 130, the core 131 around the fastening member 300 is compressed, and the front skin 132 and / or the rear skin 133 may be punched. The front surface of the front skin 132 may form the same plane as the front surface of the head 310 of the fastening member 300. The front skin 132 may contact the side and bottom surfaces of the head 310 of the fastening member 300. The front skin 132 may be pressed between the head 310 and the neck 340 of the fastening member 300.

[0171] The rear skin 133 may face the front skin 132 across the core 131. The rear skin 133 may contact the outer surface and / or the top surface of the shaft body 320 of the fastening member 300. The core 131 is compressed between the front skin 132 and the rear skin 133, and is pressed between the top surface of the shaft body 320, the bottom surface of the head 310, and the side surface of the neck 340. Thus, the vertical fastening force of the fastening member 300 on the composite panel 130 can be improved. The vertical fastening force may be a resistance to a force applied along the length direction of the fastening member 300.

[0172] Thus, the fastening member 300 may be firmly bonded to the composite material panel 130 having a small thickness.

[0173] Reference Fig.39 and Fig.40 , the head 310 may be formed into multiple sections 311, 312. The head 310 may include a first head 311 and a second head 312. The first head 311 may have a diameter I1 and a thickness D1, and the second head 312 may have a diameter I2 and a thickness D2. The second head 312 may be located on the upper side of the first head 311. The second head 312 may form an upper portion of the head 310, and the first head 311 may form a lower portion of the head 310. The diameter I2 of the second head 312 may be greater than the diameter I1 of the first head 311. The thickness D1 of the first head 311 may be greater than the thickness D2 of the second head 312. The diameter I1 of the first head 311 may be greater than the diameter A of the shaft body 320. The diameter A of the shaft body 320 may be greater than the diameter B of the neck 340.

[0174] The thickness D(D1+D2) of the head 310 may be greater than the thickness ED of the neck 340. The thickness D(D1+D2) of the head 310 may be greater than the thickness of the front skin 132.

[0175] For example, where the skins 312, 313 comprise aluminum, the thickness of the front skin 132 may be 0.5 mm, the thickness of the rear skin 133 may be 0.5 mm, and the thickness of the core 131 may be 3 mm.

[0176] As another example, in the case where the skins 312, 313 include iron, the thickness of the front skin 132 may be 0.2 to 0.3 mm, the thickness of the rear skin 133 may be 0.2 to 0.3 mm, and the thickness of the core 131 may be 3 mm.

[0177] For example, the thickness D1 of the first head 311 may be 0.8 to 1.2 mm, and the thickness D2 of the second head 312 may be 0.4 to 0.8 mm. For example, the thickness ED of the neck 340 may be 0.8 to 1.3 mm.

[0178] The diameter A of the shaft body 320 may be greater than the diameter B of the neck portion 340. For example, the difference AB between the diameter A of the shaft body 320 and the diameter B of the neck portion 340 may be 0.8 mm.

[0179] Reference Fig.41 and Fig.42 The fastening hole H may include a through hole PH, a first punching portion HD1 and a second punching portion HD2. Fig.32) can be inserted into the through hole PH. The diameter D1 of the through hole PH can be the same as the diameter A of the shaft body 320 (see Fig.39 ). For example, the diameter D1 of the through hole PH may be 7.5 to 8.5 mm. As another example, the diameter D1 of the through hole PH may be 8.1 mm.

[0180] The first stamping portion HD1 may be formed by recessing the front skin 132. The second stamping portion HD2 may be formed by recessing the rear skin 133. The depth H2 of the second stamping portion HD2 may be greater than the depth H1 of the first stamping portion HD1. For example, the depth H1 of the first stamping portion HD1 may be 0.4 mm, and the depth H2 of the second stamping portion HD2 may be 1.8 mm.

[0181] The diameter D2 of the first punching part HD1 may correspond to the diameter D2 of the second punching part HD2. For example, the diameter D2 of the first punching part HD1 and / or the diameter D2 of the second punching part HD2 may be 15 to 16 mm. As another example, the diameter D1 of the first punching part HD1 and / or the diameter D2 of the second punching part HD2 may be 15.8 mm.

[0182] The fastening member 300 (see Fig.39 ) The diameters I1 and I2 of the head 310 may be between the diameter D1 of the through hole PH and the diameter D2 of the first punching portion HD1.

[0183] Reference Figure 43 to Figure 45 After the fastening member 300 is inserted into the fastening hole H, the first punching part HD1 and the second punching part HD2 can be formed by using the reference Fig.32 The stamping process is used to form it. Fig.43 and Fig.44 The stamping parts HD1 and HD2 formed on the composite material panel 130 can be referred to as Fig.45 formed in the process described above.

[0184] The fastening member 300 may be inserted into the fastening hole H. The shaft body 320 of the fastening member 300 may pass through the through hole PH of the fastening hole H. The head 310 of the fastening member 300 that has passed through the through hole PH may be locked to the front skin 132 .

[0185] By reference Fig.32 In the stamping process, the head 310 of the fastening member 300 can be pressed into the front skin 132 and the core 131. Through stamping, the front skin 132 around the head 310 of the fastening member 300 can form a first stamping part HD1, and the rear skin 133 around the shaft body 320 of the fastening member 300 can form a second stamping part HD2.

[0186] Reference Fig.46When the fastening member 300 is combined with the composite panel 130 , the head 310 , the neck 340 and / or the shaft body 320 of the fastening member 300 may contact the front skin 132 , the rear skin 133 and / or the core 131 of the composite panel 130 .

[0187] The front skin 132 may be pressed into the head 310 and the neck 340, and the rear skin 133 may be pressed into the neck 340. The core 131 may be compressed and pressed between the front skin 132 and the rear skin 133.

[0188] The front surface of the front skin 132 may form the same plane as the outer surface of the second head 312. The front skin 132 may be pressed into the bottom step of the head 310 to be combined. The front skin 132 may contact the side and bottom surfaces of the second head 312 and the side and bottom surfaces of the first head 311. A portion of the front skin 132 may be pressed into the neck 340 and may contact the bottom surface of the first head 311 and the side surface of the neck 340.

[0189] Rear skin 133 may be pressed into neck 340 and may contact sides of neck 340 and / or sides of shaft body 320 .

[0190] Not only can the horizontal fastening force of the fastening member 300 on the composite material panel 130 be improved, but also the vertical fastening force of the fastening member 300 on the composite material panel 130 can be improved. The horizontal fastening force can be the resistance to the moment applied to the fastening member 300. The vertical fastening force can be the resistance to the force applied along the length direction of the fastening member 300.

[0191] Thus, the fastening member 300 may be firmly bonded to the composite material panel 130 having a small thickness.

[0192] Reference Fig.47 and Fig.48 The fastening member 400 may include a shaft body 410, a coupling head 420, and a shaft hole 430. The shaft body 410 may be cylindrical, and the shaft hole 430 may be formed by extending long toward the inner side of the shaft body 410 in the length direction of the shaft body 410. The shaft hole 430 may be formed by cutting off the inner side of the shaft body 410.

[0193] The coupling head 420 may include a head body 421 and a head flange 422. The head body 421 may be in a cylinder shape, and the head flange 422 may be in a disc shape extending from the upper end of the head body 421 in the radial direction of the head body 421. The coupling head 420 may be deformed under the action of an external force.

[0194] The head body 421 of the coupling head 420 may have a length D and a diameter B. The head flange 422 of the coupling head 420 may have a thickness E and a diameter A. The shaft body 410 may have a length C and a diameter B. The shaft hole 430 may have a length F and a diameter G.

[0195] For example, the length C of the shaft body 410 can be 35 mm, the diameter B of the shaft body 410 can be 20 mm, the length DE of the head body 421 can be 10 mm, the diameter B of the head body 421 can be 20 mm, the thickness E of the head flange 422 can be 0.5 mm, and the diameter A of the head flange 422 can be 27 mm.

[0196] The composite panel 130 may include a fastening hole H. The fastening hole H may include a through hole PH and a punching portion HD. The punching portion HD may be formed by recessing the front skin 132 of the composite panel 130 and compressing the core 131. The punching portion HD may form a step that becomes lower from the front surface of the front skin 132.

[0197] Reference Fig.49 and Fig.48 When the fastening member 400 is coupled to the composite panel 130 , the shaft body 410 may be inserted into the through hole PH, and the head flange 422 may be located at the stamping portion HD. The head flange 422 may support or contact the front skin 132 of the stamping portion HD.

[0198] When a force is applied in the longitudinal direction of the shaft body 410, the cylindrical head body 421 is deformed and folded, thereby forming a head ring (head rim) 421d having an outer diameter larger than that of the head body 421. The head ring 421d may be referred to as a rivet ring 421d.

[0199] Thus, not only the horizontal fastening force of the fastening member 400 on the composite material panel 130 can be improved, but also the vertical fastening force of the fastening member 400 on the composite material panel 130 can be improved. The horizontal fastening force may be a resistance to the moment applied to the fastening member 400. The vertical fastening force may be a resistance to the force applied along the length direction of the fastening member 400.

[0200] Thus, the fastening member 400 may be firmly coupled to the composite material panel 130 having a smaller thickness.

[0201] Reference Figures 1 to 49The display device includes: a display panel; a composite material panel combined with the display panel; and a fastening member combined with the composite material panel; the composite material panel includes: a front skin forming the front side of the composite material panel; a rear skin forming the back side of the composite material panel and facing the front skin; a core located between the front skin and the rear skin and including fibers; and a fastening hole formed by passing through the front skin, the rear skin and the core; the fastening member includes: an axis body inserted into the fastening hole; and a head connected to the axis body and pressed into either the front skin or the rear skin; either the front skin or the rear skin can contact the side of the head.

[0202] The fastening member further includes a neck connecting the shaft body and the head, and either the front skin or the rear skin may be pressed between the head and the shaft body toward the neck.

[0203] The fastening member has a cylindrical shape as a whole, the diameter of the head portion may be greater than the diameter of the shaft body, and the diameter of the shaft body may be greater than the diameter of the neck portion.

[0204] The head portion includes: a first head portion connected to the neck portion; and a second head portion connected to the first head portion to form a top surface of the fastening member; a diameter of the second head portion may be greater than a diameter of the first head portion.

[0205] The head portion includes steps formed at the first head portion and the second head portion, and either the front skin or the rear skin may be in contact with the steps.

[0206] A portion of the core adjacent to the head portion is compressed, and a thickness of the core may gradually increase in a radial direction of the shaft body.

[0207] The front skin, the rear skin, and the core may be pressed toward the neck between the head and the shaft body and contact at least one of a bottom surface of the head, a side surface of the neck, and a top surface of the shaft body.

[0208] The thickness of the first head portion may be greater than the thickness of the second head portion, and the thickness of the neck portion may be greater than the thickness of the first head portion.

[0209] The fastening member further includes an axial hole formed by cutting off the inner side of the shaft body along the length direction of the shaft body from a terminal end surface of the shaft body forming a bottom surface of the fastening member, and the length of the shaft body may be greater than the length of the axial hole.

[0210] The head of the fastening member is pressed into the front skin; the composite material panel also includes: a first stamping portion, which is formed by the depression of the front skin around the head of the fastening member; and a second stamping portion, which is formed by the depression of the rear skin around the axial body of the fastening member; the depth of the second stamping portion can be greater than the depth of the first stamping portion.

[0211] The outer surface of the head portion may form a same plane as the outer surface of the front skin forming the first stamping portion.

[0212] The diameter of the shaft body may correspond to the diameter of the fastening hole, and the diameter of the head may be greater than the diameter of the shaft body. The fastening member may be a rivet nut.

[0213] The thickness of the neck portion may be greater than the thickness of the head portion. The thickness of the neck portion may be less than the thickness of the head portion.

[0214] Any of the aforementioned embodiments of the present invention or other embodiments are not exclusive or distinguishable from each other. The various components or functions of any of the aforementioned embodiments of the present invention or other embodiments may be mixed or combined.

[0215] For example, it means that the A structure described in a specific embodiment and / or drawings can be combined with the B structure described in other embodiments and / or drawings. That is, even if the combination between the structures is not directly described, it means that they can be combined unless it is clearly stated that they cannot be combined.

[0216] The detailed descriptions described above should not be interpreted as limiting in all aspects, but should be understood as exemplary. The scope of the present invention should be determined by the reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention fall within the scope of the present invention.

Claims

1. A display device, wherein: include: Display panel; A composite material panel, combined with the display panel; as well as a fastening member, coupled to the composite material panel; The composite material panel comprises: a front skin forming a front face of the composite panel; a rear skin, forming the back side of the composite panel and facing the front skin; a core located between the front skin and the rear skin and comprising fibers; and A fastening hole formed through the front skin, the rear skin and the core; The fastening member comprises: a shaft body inserted into the fastening hole; and a head connected to the shaft body and pressed into any one of the front skin and the rear skin; Either the front skin or the rear skin is in contact with a side surface of the head.

2. The display device according to claim 1, wherein: The fastening member further includes a neck connecting the shaft body and the head. Either the front skin or the rear skin is pressed toward the neck between the head and the shaft body.

3. The display device according to claim 2, wherein: The fastening member has a cylindrical shape as a whole, The diameter of the head is greater than the diameter of the shaft body, The shaft body has a diameter greater than a diameter of the neck.

4. The display device according to claim 3, wherein: The header includes: A first head connected to the neck; and a second head portion connected to the first head portion and forming a top surface of the fastening member; The diameter of the second head is greater than the diameter of the first head.

5. The display device according to claim 4, wherein: The head portion includes steps formed at the first head portion and the second head portion, Either the front skin or the rear skin is in contact with the step.

6. The display device according to claim 5, wherein: A portion of the core adjacent to the head is compressed, and a thickness of the core gradually increases in a radial direction of the shaft body.

7. The display device according to claim 3, wherein: The front skin, the rear skin, and the core are pressed toward the neck between the head and the shaft body, and are in contact with at least one of a bottom surface of the head, a side surface of the neck, and a top surface of the shaft body.

8. The display device according to claim 4, wherein: The thickness of the first head is greater than the thickness of the second head, The thickness of the neck portion is greater than the thickness of the first head portion.

9. The display device according to claim 8, wherein: The fastening member further includes an axial hole formed by cutting away the inner side of the shaft body along the length direction of the shaft body from a distal end surface of the shaft body forming a bottom surface of the fastening member. The length of the shaft body is greater than the length of the shaft hole.

10. The display device according to claim 1, wherein: The head of the fastening member is pressed into the front skin; The composite panel also includes: a first stamping portion formed by recessing the front skin around the head of the fastening member; as well as a second stamping portion formed by being recessed by the rear skin around the shaft body of the fastening member; The depth of the second punching portion is greater than the depth of the first punching portion.

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