Buffer plate and display device comprising the same

Abstract

A buffer plate and a display device including the same are disclosed. The buffer plate includes an impact absorbing layer disposed on a rear surface of a display panel, and a first metal layer disposed on an upper portion of the impact absorbing layer. The impact absorbing layer and the first metal layer have a first curvature region in which at least one perforated pattern is defined or arranged in the first curvature region of the first metal layer.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefits to Korean Patent Application No. 10-2021-0082518, filed on June 24, 2021, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to display devices, and more specifically, to a buffer plate and a display device including the buffer plate, the buffer plate being able to improve heat dissipation performance for dissipating heat generated from the display panel and rigidity performance for protecting the display panel from external physical impacts. Background Technology

[0004] Display devices that display various information on a screen are a key technology in the information and communication age, and are being developed to be thinner, lighter, more portable, and have higher performance.

[0005] Such display devices are implemented in various forms, such as televisions, monitors, smartphones, tablets, laptops, and wearable devices.

[0006] Recently, display devices with curved surfaces have been developed to increase the viewer's immersion and tension.

[0007] During operation of the display device, heat is generated from the display panel. When this heat is continuously concentrated, the components of the display panel can be damaged or deformed, causing a rapid decrease in the driving stability and lifespan of the display device.

[0008] In addition, because the display panel is in the form of a thin film, it is susceptible to external physical impacts. Summary of the Invention

[0009] The display device includes a buffer plate disposed on the rear surface of the display panel. The buffer plate dissipates heat generated from the display panel and protects the display panel from external physical impacts.

[0010] In the case of a display device that includes a curvature region with a radius of curvature equal to or less than a specific radius of curvature, when a buffer plate is attached, a bulge or depression may occur in the curvature region.

[0011] Such bulges or depressions in the buffer plate can hinder the efficient dissipation of heat generated from the display panel, or prevent the display panel from being protected from external physical impacts.

[0012] The inventors of the present disclosure invented a buffer plate that can dissipate heat generated from a display panel and protect the display panel even in a case where a curvature region including a curvature radius equal to or smaller than a certain curvature radius is included.

[0013] An object of the present disclosure is to provide a buffer plate and a display device including the same that can improve heat dissipation performance of dissipating heat generated from a display panel and rigidity performance of protecting the display panel from external physical impact.

[0014] Further, an object of the present disclosure is to provide a buffer plate and a display device including the same that can improve heat dissipation performance and rigidity performance by preventing a bumping or sagging phenomenon from occurring in a curvature region.

[0015] Objects of the present disclosure are not limited to the above-described objects. Other objects and advantages of the present disclosure not mentioned above can be understood based on the following description, and can be more clearly understood based on embodiments of the present disclosure. Further, it will be easily understood that the objects and advantages of the present disclosure can be achieved using the means shown in the embodiments and combinations thereof.

[0016] A buffer plate according to an embodiment includes an impact absorbing layer disposed on a rear surface of a display panel, and a first metal layer disposed on the impact absorbing layer. The impact absorbing layer and the first metal layer have a first curvature region, and at least one perforation pattern is defined or disposed in the first curvature region of the first metal layer.

[0017] A display device according to an embodiment includes a display panel and a buffer plate disposed on a rear surface of the display panel. The buffer plate includes an impact absorbing layer disposed on a rear surface of a display panel, and a first metal layer disposed on the impact absorbing layer. The impact absorbing layer and the first metal layer have a first curvature region, and at least one perforation pattern is defined or disposed in the first curvature region of the first metal layer.

[0018] A display device according to an embodiment includes a display panel including a first curvature region and a second curvature region, and a buffer plate disposed on a rear surface of the display panel. A curvature radius of the first curvature region is equal to or smaller than a reference curvature radius, and a curvature radius of the second curvature region is greater than the reference curvature radius. The buffer plate includes an impact absorbing layer disposed on a rear surface of a display panel, and a first metal layer disposed on the impact absorbing layer. The impact absorbing layer, the first metal layer, and a second metal layer have a first curvature region, and at least one perforation pattern is defined or disposed in a region of the first metal layer corresponding to the first curvature region.

[0019] The display device according to the embodiment includes a display panel having a first curvature area, and a buffer plate disposed on a rear surface of the display panel. The buffer plate includes an impact absorbing layer disposed on the rear surface of the display panel, a first metal layer disposed on the impact absorbing layer, and a second metal layer disposed on the first metal layer and having a smaller strength and a higher thermal conductivity than the first metal layer, wherein a relationship between a thickness of the first metal layer and a thickness of the second metal layer is set based on a performance requirement of the display device, wherein at least one perforation pattern is defined or disposed in a region of the first metal layer corresponding to the first curvature area.

[0020] Since the first metal layer having a large strength is disposed on the impact absorbing layer, the buffer plate according to the embodiment and the display device including the same can improve a rigidity performance of protecting the display panel from an external physical impact.

[0021] Further, since the second metal layer having a high thermal conductivity is disposed on the first metal layer, the buffer plate according to the embodiment and the display device including the same can improve a heat dissipation performance of dissipating heat generated from the display panel.

[0022] Further, since the at least one perforation pattern is defined or disposed in the region of the first metal layer corresponding to the first curvature area, the buffer plate according to the embodiment and the display device including the same can prevent a bulging or sagging phenomenon of the buffer plate in the first curvature area.

[0023] Further, since the bulging or sagging phenomenon in the first curvature area is prevented, the buffer plate according to the embodiment and the display device including the same can improve the rigidity performance and the heat dissipation performance.

[0024] Further, the buffer plate according to the embodiment and the display device including the same can provide driving stability and slow down a deterioration speed of a lifespan by improving the heat dissipation performance.

[0025] Effects of the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a view showing a display device according to an embodiment.

[0027] Figures 2 to 5 is a cross-sectional view taken along a cutting line I-I' shown in Figure 1 and are partial cross-sectional views of buffer plates according to first to fourth embodiments, respectively.

[0028] Figure 6 , Figure 6a ,Figure 6b , Figures 7 to 9 is a cross-sectional view taken along the cutting line II-II' shown in Figure 1 are partial cross-sectional views of the display module according to the fifth to eighth embodiments, respectively. DETAILED DESCRIPTION

[0029] Advantages and features of the present disclosure and methods of accomplishing the same can become apparent from the embodiments described below in detail. However, the present disclosure is not limited to the embodiments disclosed below, but can be implemented in various different forms. Therefore, the embodiments are presented only to make the present disclosure complete and to fully convey the scope of the present disclosure to those skilled in the art to which the present disclosure pertains, and the present disclosure is defined only by the scope of the claims.

[0030] The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present disclosure are exemplary, and the present disclosure is not limited thereto. Herein, the same reference numerals refer to the same elements. Also, descriptions and details of known steps and elements are omitted for simplicity of description. Also, in the following detailed description of the present disclosure, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it will be understood by one of ordinary skill in the art that the present disclosure can be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present disclosure.

[0031] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", when used in this specification, specify the presence of stated features, integers, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and / or portions thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Expressions such as "at least one of," when preceding a list of elements, can modify the entire list of elements and can not modify the individual elements of the list. In interpreting numerical values, errors or tolerances can occur even if not explicitly described.

[0032] Furthermore, it will be understood that when a first element or layer is referred to as being “on” or “top” of a second element or layer, the first element can be directly on the second element or layer, or intervening elements or layers can also be present. In addition, it will also be understood that when an element or layer is referred to as being “between” two elements or layers, it can be the only element or layer between the two elements or layers, or one or more intervening elements or layers can also be present.

[0033] Furthermore, as used herein, when a layer, film, region, plate, etc. is referred to as being “on” or “top” of another layer, film, region, plate, etc., the former can be directly in contact with the latter, or one or more intervening layers, films, regions, plates, etc. can also be present. As used herein, when a layer, film, region, plate, etc. is referred to as being “directly on” or “directly top” of another layer, film, region, plate, etc., the former is in direct contact with the latter and no intervening layers, films, regions, plates, etc. are present between the former and the latter. Furthermore, as used herein, when a layer, film, region, plate, etc. is referred to as being “under” or “below” another layer, film, region, plate, etc., the former can be directly in contact with the latter, or one or more intervening layers, films, regions, plates, etc. can also be present. As used herein, when a layer, film, region, plate, etc. is referred to as being “directly under” or “directly below” another layer, film, region, plate, etc., the former is in direct contact with the latter and no intervening layers, films, regions, plates, etc. are present between the former and the latter.

[0034] In describing a temporal relationship of events, for example, a temporal precedence relationship between two events such as “after,” “subsequent to,” “before,” etc., unless indicated as “immediately after,” “immediately subsequent to,” or “immediately before,” other events can occur between the two events.

[0035] It will be understood that, although the terms “first,” “second,” “third,” etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section described below could be termed a second element, component, region, layer or section without departing from the spirit and scope of the present disclosure.

[0036] Features of various embodiments of the present disclosure can be partially or wholly combined with each other, and can be technically linked or operable with each other. Embodiments can be implemented independently from each other and can be implemented together in a linked manner.

[0037] As used herein, the terms "substantially," "approximately," and similar terms are used as terms of approximation and are intended to account for the inherent deviations in measured or calculated values that would be recognized by those of ordinary skill in the art. The terms can be used to prevent unauthorized infringers from designing around the accurate or absolute numbers provided in helping to understand the present disclosure.

[0038] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this inventive concept belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an overly idealized or formal sense unless expressly so defined herein.

[0039] Hereinafter, a buffer plate and a display device including the same, which can improve heat dissipation performance of dissipating heat generated from a display panel and rigidity performance of protecting the display panel from external physical impact, are disclosed.

[0040] Figure 1 FIG. 1 is a diagram of a display device 100 according to an embodiment.

[0041] The direction of the rear surface and the upward direction defined in the present disclosure refer to the Z-axis direction, and the direction of the front surface and the downward direction refer to the -Z-axis direction. In one example, Figure 1 The rear surface of the display device 100 is shown.

[0042] The display device 100 can include a display panel and a buffer plate. The display panel can include a display area that displays an image on a front surface thereof, and the buffer plate can be disposed on a rear surface of the display panel.

[0043] Referring to Figure 1 The display device 100 according to an embodiment can be divided into a first curvature area CA1 and a second curvature area CA2.

[0044] The first curvature area CA1 can be defined as an area in which a curvature radius is equal to or less than a reference curvature radius. Also, the second curvature area CA2 can be defined as an area in which a curvature radius is greater than the reference curvature radius, or can be defined as a flat area having no curvature. In one example, the reference curvature radius can be set as a threshold at which a bulging or sagging phenomenon occurs due to the curvature when the buffer plate is attached to the rear surface of the display panel.

[0045] In addition, the display device 100 can further include a source driver (not shown) that provides a source signal corresponding to image data to the display panel, a timing controller (not shown) that provides image data received from a host system to the source driver, and the like.

[0046] Figure 2 is a cross-sectional view taken along a cutting line I-I' shown in FIG. 1, and is a partial cross-sectional view of the buffer plate CP according to the first embodiment and the display device 100 including the same. Figure 1

[0047] Referring to Figure 2 The display device 100 according to the first embodiment includes a display panel DP and a buffer plate CP.

[0048] The display panel DP includes a display area for displaying an image on a front surface thereof. In one example, a plurality of sub-pixels (not shown), a plurality of data lines (not shown), a plurality of gate lines (not shown), and the like can be disposed in the display area.

[0049] The buffer plate CP is disposed on a rear surface of the display panel DP and includes an impact absorbing layer 110, a first metal layer 120, and a protective film 130.

[0050] First, the impact absorbing layer 110 includes a first adhesive layer 112, a foam layer 114, and a second adhesive layer 116.

[0051] The first adhesive layer 112 is disposed between the rear surface of the display panel DP and the foam layer 114 to adhere the foam layer 114 to the rear surface of the display panel DP.

[0052] The foam layer 114 is disposed between the first adhesive layer 112 and the second adhesive layer 116. In one example, the foam layer 114, which is a foam having a plurality of air bubbles therein, can be made of polyurethane foam.

[0053] The second adhesive layer 116 is disposed between the foam layer 114 and the first metal layer 120 to adhere the first metal layer 120 to the foam layer 114.

[0054] The first metal layer 120 is disposed between the second adhesive layer 116 and the protective film 130. In one example, the first metal layer 120 can be made of stainless steel having a strength equal to or greater than a reference strength. The reference strength can be exemplified as a value at which the display panel DP can be protected from external physical impact.

[0055] In one example, a thickness of the first adhesive layer 112 can be greater than a thickness of the second adhesive layer 116, and a thickness of the first metal layer 120 can be greater than a thickness of the foam layer 114.​

[0056] A protective film 130 is disposed on the first metal layer 120. The protective film 130 can serve to protect the display panel DP from cracks, scratches, dust, etc.

[0057] The buffer plate CP according to the first embodiment and the display device 100 including the same can include an impact absorbing layer 110 in which a plurality of air bubbles are formed, and a first metal layer 120 having a large strength to improve a rigidity performance of protecting the display panel DP from external physical impact.

[0058] Figure 3 is a cross-sectional view taken along a cutting line I-I' shown in Figure 1 , and is a partial cross-sectional view of the buffer plate CP according to the second embodiment and the display device 100 including the same.

[0059] Referring to Figure 3 , the display device 100 according to the second embodiment includes a display panel DP and a buffer plate CP. Hereinafter, the description of the same components, e.g., the description of the display panel DP and the protective film 230 will be replaced with the description of the display panel DP and the protective film 230, respectively. Figure 2

[0060] The buffer plate CP includes an impact absorbing layer 210, a second metal layer 220, and a protective film 230.

[0061] The impact absorbing layer 210 includes an adhesive layer 212 and a foam layer 214. The adhesive layer 212 is disposed between the rear surface of the display panel DP and the foam layer 114 to adhere the foam layer 214 to the rear surface of the display panel DP.

[0062] The foam layer 214 is disposed between the adhesive layer 212 and the second metal layer 220. In one example, the foam layer 214, which is a foam having a plurality of air bubbles therein, can be made of polyurethane foam.

[0063] The second metal layer 220 is disposed between the foam layer 214 and the protective film 230. In one example, the second metal layer 220 can be made of copper having a high thermal conductivity, and can have a thickness greater than that of the foam layer 214.

[0064] The buffer plate CP according to the second embodiment and the display device 100 including the same can include a second metal layer 220 having a high thermal conductivity to improve a heat dissipation performance of dissipating heat generated by the display panel.

[0065] Figure 4 is a cross-sectional view taken along a cutting line I-I' shown in Figure 1 ​The cross-sectional view taken along the cutting line I-I' is shown, and is a partial cross-sectional view of the buffer plate CP and the display device 100 including the same according to the third embodiment.

[0066] Referring to Figure 4 The display device 100 according to the third embodiment includes a display panel DP and a buffer plate CP.

[0067] The buffer plate CP is disposed on a rear surface of the display panel DP, and includes an impact absorbing layer 310, a first metal layer 320, a second metal layer 330, and a protective film 340.

[0068] The impact absorbing layer 310 includes a first adhesive layer 312, a foam layer 314, and a second adhesive layer 316. The first adhesive layer 312 is disposed between the rear surface of the display panel DP and the foam layer 314 to adhere the foam layer 314 to the rear surface of the display panel DP.

[0069] The foam layer 314 can be disposed between the first adhesive layer 312 and the second adhesive layer 316, and a plurality of air bubbles can be formed in the foam layer. The second adhesive layer 316 is disposed between the foam layer 314 and the first metal layer 320 to adhere the first metal layer 320 to the foam layer 314.

[0070] The first metal layer 320 is disposed between the second adhesive layer 316 and the second metal layer 330, and the second metal layer 330 is disposed between the first metal layer 320 and the protective film 340.

[0071] The first metal layer 320 has a greater strength than the second metal layer 330, and the second metal layer 330 has a higher thermal conductivity than the first metal layer 320. In one example, the first metal layer 320 can be formed of stainless steel, and the second metal layer 330 can be made of copper.

[0072] The first metal layer 320 can have a smaller thickness than the foam layer 314. Also, the first metal layer 320 can have a greater thickness than the second metal layer 330.

[0073] Since stainless steel is applied to the first metal layer 320, rigidity can be improved and the rear surface is protected from damage. The second metal layer 330 is an area of the M-FPCB or group ground of the display device 100. Accordingly, resistance management is important for the second metal layer 330, and the second metal layer 330 is effective for heat dissipation when copper is applied to the second metal layer compared to the case where stainless steel is applied to the second metal layer.

[0074] Further, the first metal layer 320 can be formed to have a smaller width than the impact absorbing layer 310, and the second metal layer 330 can be formed to have a smaller width than the first metal layer 320. Since there is a difference in width between the impact absorbing layer 310, the first metal layer 320, and the second metal layer 330 as such, damage to the display panel DP caused by a tolerance when attaching the buffer plate CP to the display panel DP can be prevented.

[0075] The buffer plate CP according to the third embodiment and the display device 100 including the same can include the impact absorbing layer 310 including the foam layer 314, the first metal layer 320 having a large strength, and the second metal layer 330 having a high thermal conductivity, thereby improving rigidity performance and heat dissipation performance.

[0076] Figure 5 is a cross-sectional view taken along a cutting line I-I' shown in Figure 1 , and is a partial cross-sectional view of the buffer plate CP and the display device 100 including the same according to the fourth embodiment.

[0077] Referring to Figure 5 , the display device 100 according to the fourth embodiment includes a display panel DP and a buffer plate CP.

[0078] The buffer plate CP is disposed on a rear surface of the display panel DP, and includes an impact absorbing layer 310, a first metal layer 320, a second metal layer 330, and a protective film 340. The description of the impact absorbing layer 310 will be replaced by the description of Figure 4 .

[0079] The first metal layer 320 is disposed between the second adhesive layer 316 and the second metal layer 330, and the second metal layer 330 is disposed between the first metal layer 320 and the protective film 340. In one example, the first metal layer 320 can be made of stainless steel having a larger strength than a material of the second metal layer 330, and the second metal layer 330 can be made of copper having a higher thermal conductivity than a material of the first metal layer 320.

[0080] In the fourth embodiment, the second metal layer 330 can have a larger thickness than the first metal layer 320. Since the second metal layer 330 having a high thermal conductivity has a larger thickness than the first metal layer 320 having a high rigidity, the fourth embodiment can be applied to the display device 100 requiring high heat dissipation performance.

[0081] In the buffer plate CP, the thicknesses of the first metal layer 320 and the second metal layer 330 can vary based on the performance required for the display device 100. For example, the buffer plate CP of the display device 100 for which rigidity performance is more required than heat dissipation performance can be designed such that the thickness of the first metal layer 320 having a large strength is greater than the thickness of the second metal layer 330. Also, the buffer plate CP of the display device 100 for which heat dissipation performance is more required than rigidity performance can be designed such that the thickness of the second metal layer 330 having a high thermal conductivity is greater than the thickness of the first metal layer 320.

[0082] As described above, the thicknesses of the foam layer 314, the first metal layer 320, and the second metal layer 330 can vary based on the performance required for the display device 100 and the electronic device to which the display device 100 is applied.

[0083] The buffer plate CP according to the fourth embodiment and the display device 100 including the same can include an impact absorption layer 310 including a foam layer 314, a first metal layer 320 having a large strength, and a second metal layer 330 having a high thermal conductivity and having a thickness greater than that of the first metal layer 320 to improve rigidity performance and heat dissipation performance.

[0084] Figure 6 is a cross-sectional view taken along Figure 1 cutting line II-II' and is a partial cross-sectional view of a buffer plate CP and a display device 100 including the same according to a fifth embodiment.

[0085] Referring to Figure 6 , the display device 100 according to the fifth embodiment includes a display panel DP and a buffer plate CP.

[0086] The display device 100 can include a first curvature area CA1 having a curvature radius equal to or less than a reference curvature radius and a second curvature area CA2 having a curvature radius greater than the reference curvature radius. As another example, the second curvature area CA2 can be exemplified as a flat area having no curvature. In this regard, the reference curvature radius can be set as a threshold at which a bulging or sagging phenomenon occurs when the buffer plate is attached to the rear surface of the display panel DP.

[0087] The display panel DP includes a display area for displaying an image on a front surface thereof, and the buffer plate CP is attached to a rear surface of the display panel DP.

[0088] The buffer plate CP includes an impact absorbing layer 410, a first metal layer 420, and a protective film 430. The impact absorbing layer 410, the first metal layer 420, and the protective film 430 have a first curvature area CA1 and a second curvature area CA2.

[0089] The impact absorbing layer 410 includes a first adhesive layer 412, a foam layer 414, and a second adhesive layer 416. The first adhesive layer 412 is disposed between the rear surface of the display panel DP and the foam layer 414, and adheres the foam layer 414 to the rear surface of the display panel DP.

[0090] The foam layer 414 is disposed between the first adhesive layer 412 and the second adhesive layer 416. The foam layer 414, which is a foam in which a plurality of air bubbles are formed, can have a certain modulus of elasticity. In one example, the foam layer 414 can be made of polyurethane foam obtained by foaming a polyurethane resin.

[0091] The second adhesive layer 416 is disposed between the foam layer 414 and the first metal layer 420, and adheres the first metal layer 420 to the foam layer 414.

[0092] The first metal layer 420 is disposed between the second adhesive layer 416 and the protective film 430. The first metal layer 420 can be made of a material having a large strength. In one example, the first metal layer 420 can be made of stainless steel.

[0093] In such a first metal layer 420, at least one first perforated pattern 422 is defined or disposed in the first curvature area CA1. In one example, the first perforated pattern 422 can be defined or disposed in a thickness direction of the first metal layer 420. In another example, the first perforated pattern 422 can be defined or disposed in a width direction of the first metal layer 420. In another example, the first perforated pattern 422 can be formed in a diagonal direction. Such a first perforated pattern 422 prevents a bulging or sagging phenomenon from occurring in the first curvature area CA1 when the buffer plate CP is attached.

[0094] The first metal layer 420 has a smaller width than the impact absorbing layer 410.

[0095] Since stainless steel is applied to the first metal layer 420, the buffer plate CP can increase rigidity, and can protect the display panel DP from damage to the rear surface thereof.

[0096] The protective film 430 is formed on the first metal layer 420. At least one second perforated pattern 432 is defined or disposed in the first curvature area CA1 of the protective film 430. In one example, the second perforated pattern 432 can be defined or disposed in a thickness direction of the protective film 430.

[0097] In another example, as Figure 6a illustrated, the width of the first perforation pattern 422 can gradually decrease in the upward direction. For example, the width of the first perforation pattern 422 can be greater at a position facing the rear surface of the display panel DP in the first curvature region CA1, and the width can decrease in the upward direction.

[0098] When the buffer plate CP is attached to the rear surface of the display panel DP, the width of the lower portion that generates the compressive strength by the curvature can be greater than the width of the upper portion, and the width of the upper portion that generates the tensile strength can be smaller than the lower portion. The bulging or sagging phenomenon can be prevented from occurring in the first curvature region CA1 by the at least one first perforation pattern 422.

[0099] In yet another example, as Figure 6b illustrated, in the first curvature region CA1 of the first metal layer 420, a third perforation pattern 422a is defined or disposed in the thickness direction of the first metal layer 420, and a fourth perforation pattern 422b, 422c, and 422d having a greater width than the width of the third perforation pattern 422a is defined or disposed side by side on one side of the third perforation pattern 422a.

[0100] For example, the third perforation pattern 422a is defined or disposed at a side of the first metal layer 420 corresponding to the first curvature region CA1, and the fourth perforation patterns 422b, 422c, and 422d are defined or disposed side by side at a regular interval in the lateral direction on one side. In one example, the fourth perforation patterns 422b, 422c, and 422d can be defined or disposed such that their widths gradually increase in the lateral direction.

[0101] Since the first metal layer 420 having a great strength is disposed on the impact absorbing layer 410, such a buffer plate CP according to the fifth embodiment and a display apparatus 100 including the same can improve the rigidity performance.

[0102] Further, since the at least one perforation pattern 422 is defined or disposed in the first curvature region CA1 of the first metal layer 420, the buffer plate CP according to the fifth embodiment and the display apparatus 100 including the same can prevent the bulging or sagging phenomenon of the buffer plate CP in the first curvature region CA1.

[0103] Further, since the bulging or sagging phenomenon of the buffer plate CP is prevented in the first curvature region CA1, the buffer plate CP according to the fifth embodiment and the display apparatus 100 including the same can maintain the rigidity performance by the first metal layer 420.

[0104] Figure 7 is along Figure 1The cross-sectional view taken along the cutting line II-II' is shown, and is a partial cross-sectional view of the buffer plate CP and the display device 100 including the same according to the sixth embodiment.

[0105] Referring to Figure 7 The display device 100 according to the sixth embodiment includes a display panel DP and a buffer plate CP.

[0106] The display device 100 can be divided into a first curvature area CA1 and a second curvature area CA2. The first curvature area CA1 can be exemplified as an area having a curvature radius with a value equal to or less than a reference curvature radius, and the second curvature area CA2 can be exemplified as an area having a curvature radius with a value greater than the reference curvature radius or a flat area having no curvature.

[0107] The display panel DP includes a display area for displaying an image on a front surface thereof, and the buffer plate CP is attached to a rear surface of the display panel DP.

[0108] The buffer plate CP includes an impact absorbing layer 510, a first metal layer 520, a second metal layer 530, and a protective film 540. The impact absorbing layer 510, the first metal layer 520, the second metal layer 530, and the protective film 540 have the first curvature area CA1 and the second curvature area CA2.

[0109] The impact absorbing layer 510 includes a first adhesive layer 512, a foam layer 514, and a second adhesive layer 516. The first adhesive layer 512 is disposed between the rear surface of the display panel DP and the foam layer 514, and adheres the foam layer 514 to the rear surface of the display panel DP.

[0110] The foam layer 514 is disposed between the first adhesive layer 512 and the second adhesive layer 516. The foam layer 514 can have a plurality of air bubbles formed therein, and can have a certain modulus of elasticity. In one example, the foam layer 514 can be made of polyurethane foam obtained by foaming a polyurethane resin.

[0111] The second adhesive layer 516 is disposed between the foam layer 514 and the first metal layer 520, and adheres the first metal layer 520 to the foam layer 514.

[0112] The first metal layer 520 is disposed between the second adhesive layer 516 and the second metal layer 530. The first metal layer 520 can be made of a material having a greater strength than a material of the second metal layer 530. In one example, the first metal layer 520 can be made of stainless steel.

[0113] In the first metal layer 520, at least one first perforation pattern 522 is defined or disposed in the first curvature area CA1. In one example, the first perforation pattern 522 can be defined or disposed in a thickness direction of the first metal layer 520. In another example, the first perforation pattern 522 can be defined or disposed in a width direction of the first metal layer 520. In another example, the first perforation pattern 522 can be formed in a diagonal direction. Such a first perforation pattern 522 can prevent a bulging or sagging phenomenon from occurring in the first curvature area CA1 when the buffer plate CP is attached to the rear surface of the display panel DP.

[0114] The second metal layer 530 is disposed between the first metal layer 520 and the protective film 540. The second metal layer 530 can be made of a material having a higher thermal conductivity than a material of the first metal layer 520. In one example, the second metal layer 530 can be made of copper.

[0115] The buffer plate CP can improve rigidity by applying stainless steel to the first metal layer 520 and can protect the display panel DP from damage to the rear surface thereof, and can improve heat dissipation performance by applying copper to the second metal layer 530. In addition, the buffer plate CP improves electrostatic discharge (ESD) performance of discharging static electricity by applying copper to the second metal layer 530. The M-FPCB or group of the display device 100 can be grounded to the second metal layer 530.

[0116] The first metal layer 520 can be formed to have a greater thickness than the second metal layer 530. The thickness relationship between the first metal layer 520 and the second metal layer 530 can be changed based on the required performance of the display device 100.

[0117] For example, the buffer plate CP of the display device 100 for which rigidity performance is more required than heat dissipation performance can be designed such that the thickness of the first metal layer 520 having a large strength is greater than the thickness of the second metal layer 530. In addition, the buffer plate CP of the display device 100 for which heat dissipation performance is more required than rigidity performance can be designed such that the thickness of the second metal layer 530 having a high thermal conductivity is greater than the thickness of the first metal layer 520. In addition, in the display device 100 requiring a small thickness, the first metal layer 520 and the second metal layer 530 can be designed to have a minimum thickness available in a process.

[0118] As described above, the thicknesses of the foam layer 514, the first metal layer 520, and the second metal layer 530 and the thickness relationship therebetween can be changed based on the required performance of the display device 100 and an electronic device employing the display device 100.

[0119] The first metal layer 520 can be formed to have a width smaller than that of the shock-absorbing layer 510. Furthermore, the second metal layer 530 can be formed to have a width smaller than that of the first metal layer 520. Because of this width difference between the shock-absorbing layer 510, the first metal layer 520, and the second metal layer 530, the buffer plate CP can prevent damage to the display panel DP.

[0120] A protective film 540 is formed on the second metal layer 530. At least one second perforation pattern 542 is defined or disposed in a first curvature region CA1 of the protective film 540. In one example, the second perforation pattern 542 may be defined or disposed in the thickness direction of the protective film 540.

[0121] Since a first metal layer 520 with high strength is disposed on the impact-absorbing layer 510, the rigidity performance of such a buffer plate CP according to the sixth embodiment and the display device 100 including the buffer plate can be improved.

[0122] Furthermore, since a second metal layer 530 with high thermal conductivity is disposed on the first metal layer 520, the heat dissipation performance of the buffer plate CP according to the sixth embodiment and the display device 100 including the buffer plate can be improved.

[0123] Furthermore, since at least one perforated pattern 522 is defined or provided in the first curvature region CA1 of the first metal layer 520, the buffer plate CP according to the sixth embodiment and the display device 100 including the buffer plate can prevent the buffer plate CP from bulging or sinking in the first curvature region CA1.

[0124] Furthermore, the buffer plate CP according to the sixth embodiment and the display device 100 including the buffer plate may include a first metal layer 520 with high strength and a second metal layer 530 with high thermal conductivity, thereby improving rigidity and heat dissipation performance.

[0125] Furthermore, due to the improved heat dissipation performance, the buffer plate CP according to the sixth embodiment and the display device 100 including the buffer plate can provide driving stability and slow down the rate of lifespan degradation.

[0126] Furthermore, due to the improved rigidity performance, the buffer plate CP according to the sixth embodiment and the display device 100 including the buffer plate can protect the display panel DP from external physical impacts.

[0127] Figure 8 It is along Figure 1 The cross-sectional view shown is taken by cutting line II-II', and is a partial cross-sectional view of the buffer plate CP and the display device 100 including the buffer plate according to the seventh embodiment.

[0128] Referring to Figure 8 The display device 100 according to the seventh embodiment includes a display panel DP and a buffer plate CP. In the description of the seventh embodiment, the description of the same components will be replaced by the description of the seventh embodiment. Figure 8 Figure 7

[0129] The first metal layer 520 can be made of a material having a greater strength than a material of the second metal layer 530, for example, can be made of stainless steel. Also, in the first curvature area CA1 of the first metal layer 520, at least one first perforated pattern 522 is defined or disposed in a thickness direction of the first metal layer 520.

[0130] In one example, the width of the first perforated pattern 522 can gradually decrease in an upward direction. For example, the width of the first perforated pattern 522 can be greater at a position facing a rear surface of the display panel DP in the first curvature area CA1, and the width can decrease in the upward direction.

[0131] In another example, when the buffer plate CP is attached to the rear surface of the display panel DP, the width of the lower portion, which generates the compressive strength, can be greater than the width of the upper portion, and the width of the upper portion, which generates the tensile strength, can be smaller than the lower portion. The bulging or sagging phenomenon can be prevented from occurring in the first curvature area CA1 by the at least one first perforated pattern 522.

[0132] The second metal layer 530 can be made of a material having a higher thermal conductivity than the first metal layer 520, for example, can be made of copper.

[0133] A protective film 540 is formed on the second metal layer 530. At least one second perforated pattern 542 is defined or disposed in the first curvature area CA1 of the protective film 540.

[0134] In one example, the second perforated pattern 542 can be defined or disposed in a thickness direction of the protective film 540. In another example, the second perforated pattern 542 can be defined or disposed in the same shape as the first perforated pattern 522 defined or disposed in the first metal layer 520. For example, the second perforated pattern 542 can be formed in a shape in which the width gradually decreases in an upward direction.

[0135] Since the first metal layer 520 having a large strength is disposed on the impact absorbing layer 510, such a buffer plate CP according to the seventh embodiment and the display device 100 including the same can improve the rigidity performance.

[0136] Also, since the second metal layer 530 having a high thermal conductivity is disposed on the first metal layer 520, the buffer plate CP according to the seventh embodiment and the display device 100 including the same can improve the heat dissipation performance.​​

[0137] Further, since the at least one perforated pattern 522 is defined or disposed in the first curvature area CA1 of the first metal layer 520, the cushion plate CP according to the seventh embodiment and the display device 100 including the same can prevent a bulging or sagging phenomenon of the cushion plate CP in the first curvature area CA1.

[0138] Further, the cushion plate CP according to the seventh embodiment and the display device 100 including the same can include the first metal layer 520 having a large strength and the second metal layer 530 having a high thermal conductivity, thereby improving rigidity performance and heat dissipation performance.

[0139] Further, since the heat dissipation performance is improved, the cushion plate CP according to the seventh embodiment and the display device 100 including the same can provide driving stability and slow down a deterioration speed of a lifespan.

[0140] Further, since the rigidity performance is improved, the cushion plate CP according to the seventh embodiment and the display device 100 including the same can protect the display panel DP from external physical impact.

[0141] Figure 9 is a cross-sectional view taken along a cutting line II-II' shown in FIG. 11, and is a partial cross-sectional view of a cushion plate CP and a display device 100 according to an eighth embodiment. Figure 1 is a cross-sectional view taken along a cutting line II-II' shown in FIG. 11, and is a partial cross-sectional view of a cushion plate CP and a display device 100 according to an eighth embodiment.

[0142] Referring to Figure 9 , the display device 100 according to the eighth embodiment includes a display panel DP and a cushion plate CP. In Figure 9 the description, the description of the same components will be replaced with Figure 7 and Figure 8 the description.

[0143] The first metal layer 520 can be made of a material having a higher strength than a material of the second metal layer 530, for example, can be made of stainless steel. Further, in the first curvature area CA1 of the first metal layer 520, a third perforated pattern 522a is defined or disposed in a thickness direction of the first metal layer 520, and a fourth perforated pattern 522b, 522c, and 522d having a width greater than a width of the third perforated pattern 522a is defined or disposed side by side on one side of the third perforated pattern 522a.

[0144] For example, a third perforation pattern 522a is defined or disposed at a side of the first metal layer 520 corresponding to the first curvature region CA1, and fourth perforation patterns 522b, 522c, and 522d are defined or disposed side by side at a regular pitch in the lateral direction on one side. In one example, the fourth perforation patterns 522b, 522c, and 522d can be defined or disposed such that their widths gradually increase in the lateral direction.

[0145] Advantages of the buffer plate CP according to the eighth embodiment and the display device 100 including the same will be replaced with descriptions of Figure 7 and Figure 8 .

[0146] The buffer plate CP according to the first embodiment includes an impact absorbing layer 110 disposed on a rear surface of a display panel DP, a first metal layer 120 disposed on the impact absorbing layer 110 and having a strength equal to or greater than a reference strength, and a protective film 130 formed on the first metal layer 120.

[0147] The buffer plate CP according to the second embodiment includes an impact absorbing layer 210 disposed on a rear surface of a display panel DP, a second metal layer 220 disposed on the impact absorbing layer 210 and having a high thermal conductivity, and a protective film 230 formed on the second metal layer 220.

[0148] The buffer plate CP according to the third embodiment includes an impact absorbing layer 310 disposed on a rear surface of a display panel DP, a first metal layer 320 disposed on the impact absorbing layer 310 and having a large strength, a second metal layer 330 disposed on the first metal layer 320 and having a high thermal conductivity, and a protective film 340 formed on the second metal layer 330.

[0149] In the fourth embodiment, the second metal layer 330 has a greater thickness than the first metal layer 320.

[0150] The buffer plate CP according to the fifth embodiment includes an impact absorbing layer 410 disposed on a rear surface of a display panel DP, a first metal layer 420 disposed on the impact absorbing layer 410 and having a large strength, and a protective film 430 formed on the first metal layer 420. The impact absorbing layer 410 and the first metal layer 420 have a first curvature region CA1, and at least one perforation pattern 422 is defined or disposed in the first curvature region CA1 of the first metal layer 420.

[0151] The buffer plate CP according to the sixth embodiment includes an impact absorbing layer 510 provided on a rear surface of the display panel DP, a first metal layer 520 provided on the impact absorbing layer 510 and having a large strength, and a second metal layer 530 formed on the first metal layer 520. The impact absorbing layer 510, the first metal layer 520, and the second metal layer 530 have a first curvature region CA1, and at least one perforated pattern 522 is defined or provided in the first curvature region CA1 of the second metal layer 520.

[0152] In the sixth embodiment, the at least one perforated pattern 522 is defined or provided in a thickness direction of the first metal layer 520.

[0153] In the sixth embodiment, the first metal layer 520 has a larger strength than the second metal layer 530.

[0154] In the sixth embodiment, the first metal layer 520 has a larger thickness than the second metal layer 530.

[0155] In the sixth embodiment, the second metal layer 530 has a larger thickness than the first metal layer 520.

[0156] In the sixth embodiment, the impact absorbing layer 510 includes a first adhesive layer 512 adhered to a rear surface of the display panel DP, a foam layer 514 provided on the first adhesive layer 512 and having a plurality of air bubbles formed therein, and a second adhesive layer 516 provided between the foam layer 514 and the first metal layer 520.

[0157] In the sixth embodiment, the first metal layer 520 has a smaller width than the impact absorbing layer 510.

[0158] In the sixth embodiment, the second metal layer 530 has a smaller width than the first metal layer 520.

[0159] In the sixth embodiment, the impact absorbing layer 510, the first metal layer 520, and the second metal layer 530 are divided into a first curvature region CA1 having a curvature radius smaller than a reference curvature radius and a second curvature region CA2 having a curvature radius larger than the reference curvature radius.

[0160] In the sixth embodiment, a protective film 540 formed on the second metal layer 530 is further included, and at least one second perforated pattern 542 is defined or provided in a region of the protective film 540 corresponding to the first curvature region CA1.

[0161] In the seventh embodiment, at least one perforation pattern 522 is defined or disposed in a thickness direction of the first metal layer 520 and has a width that decreases in an upward direction.

[0162] In the eighth embodiment, in the first curvature region CA1 of the first metal layer 520, a third perforation pattern 522a is defined or disposed in a thickness direction of the first metal layer CA1, and fourth perforation patterns 522b, 522c, and 522d having a width greater than that of the third perforation pattern 522a are defined or disposed side by side in a lateral direction from the third perforation pattern 522a.

[0163] The scope of the present disclosure should be interpreted by the scope of the claims, and all technical ideas within the scope equivalent thereto should be interpreted as included in the scope of the present disclosure. Although the embodiments of the present disclosure have been described in more detail with reference to the accompanying drawings, the present disclosure is not necessarily limited to these embodiments. The present disclosure can be implemented in various modified forms without departing from the scope of the technical idea of the present disclosure. Therefore, the embodiments disclosed in the present disclosure are not intended to limit the technical idea of the present disclosure, but to describe the present disclosure. The scope of the technical idea of the present disclosure is not limited by the embodiments. Therefore, it should be understood that the above-described embodiments are illustrative and non-limiting in all aspects. The scope of protection of the present disclosure should be interpreted by the claims, and all technical ideas within the scope of the present disclosure should be interpreted as included in the scope of the present disclosure.

Claims

1. A buffer plate comprising: an impact absorbing layer disposed on a rear surface of a display panel; and a first metal layer disposed on the impact absorbing layer; wherein the impact absorbing layer and the first metal layer have a first curvature region, wherein at least one perforation pattern is disposed in the first curvature region of the first metal layer, and wherein the at least one perforation pattern is disposed in a thickness direction of the first metal layer and has a width that decreases in an upward direction. 2.The buffer plate of claim 1, further comprising: a second metal layer disposed on the first metal layer and having a higher thermal conductivity than the first metal layer, wherein the second metal layer has a first curvature region. the first metal layer has a greater strength than the second metal layer.

3. The cushioning panel of claim 2, wherein, the first metal layer has a greater thickness than the second metal layer.

4. The cushioning panel of claim 3, wherein, the second metal layer has a greater thickness than the first metal layer.

5. The cushioning panel of claim 3, wherein, the impact absorbing layer comprises:

6. The bumper plate of any one of claims 1 to 5, wherein, a first adhesive layer adhered to the display panel; a foam layer disposed on the first adhesive layer and having a plurality of air bubbles formed therein; and a second adhesive layer disposed between the foam layer and the first metal layer. the first metal layer has a smaller width than the impact absorbing layer.

7. The bumper plate of any one of claims 2 to 5, wherein, the second metal layer has a smaller width than the first metal layer.

8. The bumper panel of claim 7, wherein, the impact absorbing layer and the first metal layer are divided into the first curvature region having a smaller curvature radius than a reference curvature radius and a second curvature region having a greater curvature radius than the reference curvature radius.

9. The bumper plate of any one of claims 1 to 5, wherein, in the first curvature region of the first metal layer, a third perforation pattern is disposed in a thickness direction of the first metal layer, and a fourth perforation pattern having a greater width than a width of the third perforation pattern is disposed side by side in a lateral direction of the third perforation pattern.

10. The bumper plate of any one of claims 1 to 5, wherein, 11.The buffer plate of claim 1, further comprising a protective film disposed on the first metal layer, at least one second perforation pattern is disposed in a region of the protective film corresponding to the first curvature region. wherein, 12.The buffer plate of any one of claims 2 to 5, further comprising a protective film disposed on the second metal layer, at least one second perforation pattern is disposed in a region of the protective film corresponding to the first curvature region. wherein the impact absorbing layer, the first metal layer, and the second metal layer are divided into the first curvature region having a smaller curvature radius than a reference curvature radius and a second curvature region having a greater curvature radius than the reference curvature radius.

13. The bumper plate of any one of claims 2 to 5, wherein, 14.A display device comprising: a display panel; and the buffer plate of any one of claims 1 to 13 disposed on a rear surface of the display panel. 15.A display device comprising: ​ ​ A display panel including a first curvature region and a second curvature region, wherein the first curvature region has a curvature radius equal to or smaller than a reference curvature radius, and the second curvature region has a curvature radius greater than the reference curvature radius; and a buffer plate disposed on a rear surface of the display panel, wherein the buffer plate includes: a shock absorbing layer disposed on a rear surface of the display panel; and a first metal layer disposed on the shock absorbing layer and having a strength greater than a reference strength, wherein at least one perforation pattern is disposed in a region of the first metal layer corresponding to the first curvature region, and wherein the at least one perforation pattern is disposed in a thickness direction of the first metal layer and has a width that decreases in a direction upward from the rear surface of the display panel.

16. The display device of claim 15, wherein, In the region of the first metal layer corresponding to the first curvature region, a third perforation pattern is disposed in the thickness direction of the first metal layer, and a fourth perforation pattern having a width greater than that of the third perforation pattern is disposed side by side in a lateral direction of the third perforation pattern.

17. The display device of claim 15, wherein, The buffer plate further includes: a second metal layer disposed on the first metal layer and having a strength smaller than that of the first metal layer and a high thermal conductivity.

18. A display device including: a display panel having a first curvature region; and a buffer plate disposed on a rear surface of the display panel, wherein the buffer plate includes: a shock absorbing layer disposed on a rear surface of the display panel; a first metal layer disposed on the shock absorbing layer; and a second metal layer disposed on the first metal layer and having a strength smaller than that of the first metal layer and a high thermal conductivity, wherein a relationship between a thickness of the first metal layer and a thickness of the second metal layer is set based on a performance requirement of the display device, wherein at least one perforation pattern is disposed in a region of the first metal layer corresponding to the first curvature region, and wherein the at least one perforation pattern is disposed in a thickness direction of the first metal layer and has a width that decreases in a direction upward from the rear surface of the display panel.

19. The display device of claim 18, wherein, In the region of the first metal layer corresponding to the first curvature region, a third perforation pattern is disposed in the thickness direction of the first metal layer, and a fourth perforation pattern having a width greater than that of the third perforation pattern is disposed side by side in a lateral direction of the third perforation pattern.

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