Display device

Abstract

This application discloses a display device including a display module, a back panel, a rear shell, a circuit board, and a flame-retardant structure. The display module is used to display image information. The back panel covers the back of the display module. The rear shell is disposed on the side of the back panel away from the display module. The circuit board is disposed on the side of the back panel away from the display module and is located between the back panel and the rear shell. The flame-retardant structure is disposed between the back panel and the rear shell, covering the circuit board. The projected area of ​​the flame-retardant structure on the back panel is smaller than the projected area of ​​the rear shell on the back panel. The flame-retardant structure is a flame-retardant fabric, which is attached to the surface of the rear shell facing the back panel. The display device provided by this application can solve the vibration and noise problems caused by the rigid contact between the flame-retardant structure and the rear shell while ensuring the flame-retardant performance of the display device and reducing the cost of the display device, thereby helping to improve the sound output effect of the display device.

Description

Technical Field

[0001] This application relates to the field of display device technology, and more particularly to a display device. Background Technology

[0002] Display devices are widely used in users' daily lives, changing their lifestyles and providing them with a better life experience. There are many types of display devices, the main ones being televisions and monitors. A display device can function as an independent display source or be combined with other functional components to give it corresponding capabilities.

[0003] Currently, display devices on the market mainly consist of a display panel, a back panel, and a rear cover. The display panel is located on the front side of the back panel and serves as the display screen of the device, while the rear cover is located on the back side of the back panel and serves as part or all of the exterior surface of the back of the display device.

[0004] In related technologies, the power board and driver board in display devices are PS3 circuits (the electrical energy sources that cause heat can be classified into power levels PS1, PS2, and PS3). According to safety regulations, the back cover needs to be fire-resistant. Currently, the common solution is to use flame-retardant V0 material for the entire back cover to meet safety requirements. However, flame-retardant materials are expensive, and display devices in related technologies are typically large-sized, resulting in a large back cover and high cost. Utility Model Content

[0005] This application discloses a display device that can solve the vibration and noise problems caused by the rigid contact between the flame-retardant structure and the back shell while ensuring the flame-retardant performance of the display device and reducing the cost of the display device, thereby helping to improve the sound output effect of the display device.

[0006] To achieve the above objectives, this application discloses a display device, the display device comprising:

[0007] The display module is used to display image information;

[0008] A back panel that covers the back of the display module;

[0009] The rear shell is disposed on the side of the back panel opposite to the display module;

[0010] A circuit board, the circuit board being disposed on the side of the back plate opposite to the display module, and located between the back plate and the rear cover; and,

[0011] A flame-retardant and fireproof structure is disposed between the back plate and the rear shell, the flame-retardant and fireproof structure covers the circuit board, and the projected area of ​​the flame-retardant and fireproof structure on the back plate is smaller than the projected area of ​​the rear shell on the back plate.

[0012] The flame-retardant and fireproof structure is a flame-retardant and fireproof cloth, which is attached to the surface of the rear shell facing the back plate.

[0013] In the display device provided in this application embodiment, a flame-retardant fireproof structure is provided on the inner side of the back cover to cover the circuit board, thereby achieving a flame-retardant effect on the circuit board and ensuring the safety of the display device. This eliminates the need for the back cover to use flame-retardant materials, or to use high-grade flame-retardant materials, while still meeting safety regulations. In other words, in this application, only the flame-retardant fireproof structure covering the circuit board can use high-grade, high-cost flame-retardant materials. Since the projected area of ​​the flame-retardant fireproof structure on the back panel is smaller than the projected area of ​​the back cover on the back panel, the size of the flame-retardant fireproof structure is smaller than the size of the back cover. Compared to using high-grade, high-cost flame-retardant materials for the entire back cover, this reduces the use of high-grade, high-cost flame-retardant materials, thereby significantly reducing the overall cost of the display device.

[0014] Meanwhile, this application also uses flame-retardant and fireproof cloth as the flame-retardant and fireproof structure. Since flame-retardant and fireproof cloth is usually relatively soft, the contact between the flame-retardant and fireproof structure and the back shell can be a flexible contact, avoiding the rigid contact between the flame-retardant and fireproof structure and the back shell. In addition, the flame-retardant and fireproof cloth can absorb and buffer the vibration of the back shell to a certain extent, thereby solving the vibration and noise problems caused by the rigid contact between the flame-retardant and fireproof structure and the back shell, thus helping to improve the sound output effect of the display device and enhance the user's auditory experience.

[0015] In other words, the display device provided in this application embodiment can solve the vibration and noise problems caused by the rigid connection between the flame-retardant fireproof structure and the back shell while ensuring the flame-retardant performance of the display device and reducing the cost of the display device, thereby helping to improve the sound output effect of the display device and enhance the user's auditory experience.

[0016] As an optional implementation, in the embodiments of this application, the thickness of the flame-retardant and fireproof cloth is 0.05mm-0.2mm.

[0017] Controlling the thickness of the flame-retardant and fireproof cloth within the range of 0.05mm-0.2mm indicates that the thickness of the flame-retardant and fireproof cloth is relatively thin. This allows for a larger distance between the back plate and the flame-retardant and fireproof cloth, even with limited space between them, creating a larger heat dissipation opening. This facilitates convection heat dissipation and solves the problem of heat convection obstruction caused by the small gap between the flame-retardant and fireproof structure and the back shell, thereby helping to improve the heat dissipation effect of the circuit board.

[0018] As an optional implementation, in the embodiments of this application, the flame-retardant and fireproof cloth is made of one or more of the following: glass fiber, polytetrafluoroethylene fiber, aramid fiber and basalt fiber.

[0019] Using the aforementioned fibers as the material for flame-retardant and fireproof cloth, it can effectively resist high temperatures and maintain its shape when the circuit board catches fire. Even if the circuit board fire lasts for a period of time, such as 1 minute, the flame-retardant and fireproof cloth will not produce holes. This can effectively isolate and delay the flame, reduce the risk of flame spread, and play an effective fire protection role.

[0020] As an optional implementation, in an embodiment of this application, the flame-retardant and fireproof cloth has a ceramicized silicone rubber layer on the surface facing the circuit board.

[0021] With this design, when the circuit board catches fire, the ceramicized silicone rubber layer can be used to block the flames from passing through the gaps in the flame-retardant and fireproof cloth, thereby reducing the risk of the flames spreading to the back cover and igniting it.

[0022] As an optional implementation, in an embodiment of this application, the flame-retardant and fireproof cloth is fixed to the surface of the rear shell facing the back plate by adhesive.

[0023] The flame-retardant and fireproof cloth is fixed to the back shell by adhesive bonding. This allows the entire surface of the flame-retardant and fireproof cloth to be coated with adhesive, ensuring that any part of the cloth can be connected and fixed to the back shell. This achieves a seamless connection with a large connection area, thereby improving the stability of the flame-retardant and fireproof cloth on the back shell. The process is simple and efficient.

[0024] As an optional implementation, in an embodiment of this application, the display device further includes a flame-retardant and fireproof baffle, which is disposed between the back plate and the rear shell, and is located on the underside of the circuit board and covers the circuit board.

[0025] This design utilizes flame-retardant and fireproof baffles to prevent flames from falling off the circuit board when it catches fire, thus isolating and delaying the flames and further reducing the risk of the flames spreading.

[0026] As an optional implementation, in the embodiments of this application, the flame-retardant and fireproof baffle abuts against the back plate and the rear shell respectively, and the flame-retardant and fireproof baffle also abuts against the flame-retardant and fireproof cloth.

[0027] This prevents flames from spreading through the gaps between the flame-retardant fireproof baffle and the back plate, the gap between the flame-retardant fireproof baffle and the back cover, and the gap between the flame-retardant fireproof baffle and the flame-retardant fireproof cloth when the circuit board catches fire, thus helping to improve the safety of the display device.

[0028] As an optional implementation, in an embodiment of this application, the rear shell includes:

[0029] A first housing, detachably disposed on the side of the back panel opposite to the display module, and the first housing having a clearance hole for exposing the circuit board; and,

[0030] The second housing is disposed on the side of the back panel away from the display module and located below the first housing. The second housing is partially located within the clearance hole to cover the circuit board. The flame-retardant and fireproof cloth is at least partially disposed on the portion of the second housing located within the clearance hole.

[0031] In the above design scheme, the back cover adopts a split first shell and a second shell, and the first shell is detachably set on the back panel. Compared with a one-piece back cover, the first shell can be configured according to the actual needs of the market. When the first shell is not required, the cost of the back cover can be saved, which helps to reduce the cost of the display device.

[0032] In addition, since this application uses flame-retardant and fireproof cloth to isolate and delay the flame when the circuit board catches fire, the first shell and the second shell can be made of the same material, so that the colors of the first shell and the second shell can be roughly consistent, thereby weakening the color difference problem caused by splicing the first shell and the second shell.

[0033] As an optional implementation, in an embodiment of this application, the clearance hole has a notch on the bottom wall in the height direction of the display device, and the portion of the second housing located outside the clearance hole has a mounting opening;

[0034] The rear shell also includes a flame-retardant and fireproof shell, which is disposed at the mounting opening and is at least partially located on the underside of the circuit board, covering the circuit board.

[0035] This allows the flame-retardant and fireproof casing to prevent flames from falling off when the circuit board catches fire, thus isolating and delaying the flames and further reducing the risk of the flames spreading.

[0036] Furthermore, since the flame-retardant and fireproof shell is located at least partially on the underside of the circuit board—that is, the entire flame-retardant and fireproof shell can be located on the underside of the circuit board—this solution makes the flame-retardant and fireproof shell almost invisible from the rear of the display device. This solves the color difference problem caused by splicing the flame-retardant and fireproof shell with the second shell. Alternatively, one part of the flame-retardant and fireproof shell can be located on the underside of the circuit board, and the other part can be located on the side of the circuit board facing away from the back panel. Due to the presence of the flame-retardant and fireproof cloth, the part of the flame-retardant and fireproof shell located on the side of the circuit board facing away from the back panel does not need to extend to cover the circuit board, reducing the area of ​​the flame-retardant and fireproof shell. This weakens the color difference problem caused by splicing the flame-retardant and fireproof shell with the second shell. Moreover, the second shell is a one-piece molded shell structure, which improves the production efficiency of the rear shell and the efficiency of assembling the entire display device.

[0037] As an optional implementation, in the embodiments of this application, the material of the back shell is a flame-retardant material, and the flame-retardant rating of the material of the back shell is lower than that of the flame-retardant fireproof cloth.

[0038] This approach allows for a lower cost for the back cover while also providing flame-retardant properties. The combination of flame-retardant fabric and the back cover creates a dual flame-retardant effect on the circuit board, thereby improving the flame-retardant performance of the display device and enhancing its safety. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the first structure of the display device disclosed in the embodiments of this application;

[0041] Figure 2 The display device disclosed in the embodiments of this application is along Figure 1 The first sectional view along the AA direction;

[0042] Figure 3 The display device disclosed in the embodiments of this application is along Figure 1 The second sectional view along the AA direction;

[0043] Figure 4 The display device disclosed in the embodiments of this application is along Figure 1 The third sectional view along the AA direction;

[0044] Figure 5This is a schematic diagram of a second structure of the display device disclosed in the embodiments of this application;

[0045] Figure 6 This is a schematic diagram of a third structure of the display device disclosed in the embodiments of this application;

[0046] Figure 7 This is a schematic diagram of the fourth structure of the display device disclosed in the embodiments of this application.

[0047] Explanation of main figure symbols

[0048] 100 - Display device; 11 - Display module; 12 - Back panel; 13 - Rear shell; 131 - First shell; 1311 - Clearance hole; 132 - Second shell; 1321 - Mounting port; 133 - Flame-retardant and fireproof shell; 14 - Circuit board; 15 - Flame-retardant and fireproof structure; 16 - Ceramicized silicone rubber layer; 17 - Flame-retardant and fireproof baffle;

[0049] f1 - thickness direction; f2 - width direction; f3 - height direction. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this application clearer, the exemplary embodiments of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments. That is, the specific embodiments described herein are merely used to explain this application and are not intended to limit this application.

[0051] It should be noted that the brief descriptions of terminology used in this application are merely for the purpose of facilitating understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0052] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0053] The terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first housing may be referred to as a second housing, and similarly, a second housing may be referred to as a first housing. Both the first housing and the second housing are housings, but they are not the same housing.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0056] In the description of this application, it should be noted that the singular forms of "a," "an," and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that terms such as "comprising / including" or "having" specify the presence of the stated features, integrals, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integrals, steps, operations, components, parts, or combinations thereof.

[0057] In addition, the term "and / or" as used in this specification includes any and all combinations of the related listed items. For example, A and / or B can mean: A alone, A and B together, or B alone. That is, the term "and / or" as used in this specification includes any and all combinations of the related listed items.

[0058] Display devices are widely used in users' daily lives, changing their lifestyles and providing them with a better life experience. There are many types of display devices, the main ones being televisions and monitors. A display device can function as an independent display source or be combined with other functional components to give it corresponding capabilities.

[0059] Currently, display devices on the market mainly consist of a display panel, a back panel, and a rear cover. The display panel is located on the front side of the back panel and serves as the display screen of the device, while the rear cover is located on the back side of the back panel and serves as part or all of the exterior surface of the back of the display device.

[0060] In the display device industry, there are mandatory safety standards that must be met. Only when a display device meets all the safety standards can it be put on the market as a qualified product. GB 4943.1-2022, "Audio-visual, information technology and communication technology equipment - Part 1: Safety requirements," is one such standard.

[0061] This safety standard defines an ignition zone for circuit boards (such as power boards and driver boards). The protective casing within this zone must be made of a V0 fire-retardant material to prevent flames from spreading to the outside of the casing in the event of an accident, thus preventing further damage to the user. Based on these safety standards, the back covers of current display devices are required to use V0 fire-retardant materials. However, V0 fire-retardant materials are more expensive than ordinary fire-retardant materials, such as HB75 fire-retardant materials. Extensive use of V0 fire-retardant materials can significantly increase production costs.

[0062] However, in practical applications, applicants have found that the material covering the circuit board on the back cover only needs to meet security regulations, while other areas do not need to use materials that meet security regulations. Compared to materials that do not meet security regulations, materials that do meet security regulations are more expensive.

[0063] Therefore, the applicant installed a flame-retardant and fireproof cover made of V0-grade fire-retardant material between the back panel and the rear shell to cover the circuit board. This eliminates the need for the rear shell to use V0-grade fire-retardant material while still meeting safety requirements. In this solution, because the projected area of ​​the flame-retardant and fireproof cover on the back panel is smaller than that of the rear shell, and the size of the flame-retardant and fireproof cover is smaller than that of the rear shell, compared to using V0-grade fire-retardant material for the entire rear shell, the use of high-cost flame-retardant materials with high flame-retardant ratings is reduced, thereby significantly reducing the overall cost of the display device.

[0064] However, in related technologies, flame-retardant fireproof covers are usually fixed to the back shell by means of clips, screws, etc. The connection between the flame-retardant fireproof cover and the back shell is a rigid connection. When the display device emits sound, the sound waves will cause the flame-retardant fireproof cover and the back shell to vibrate, generating noise and thus affecting the sound output effect of the display device.

[0065] In view of this, embodiments of this application provide a display device that can improve sound output while taking into account flame retardant performance and low cost.

[0066] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0067] For ease of description, unless otherwise specified, the descriptions of up, down, left, right, front, and back directions in this article refer to the state when the display device is in use. Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the display device in this application. The display device 100 has a front side and a rear side arranged opposite to each other, wherein the side of the display device 100 facing the user is the front side of the display device 100, and the distance from the rear side to the front side of the display device 100 is the thickness direction (i.e., the front-to-back direction) f1 of the display device 100; the display device 100 also has a left side and a right side arranged opposite to each other, wherein the distance from the left side to the right side of the display device 100 is the width direction (i.e., the left-to-right direction) f2 of the display device 100; the display device 100 also has a top side and a bottom side arranged opposite to each other, and the distance from the bottom side to the top side of the display device 100 is the height direction (i.e., the up-down direction) f3 of the display device 100.

[0068] The display devices provided in this application are not limited to electronic products such as televisions, computer monitors, and digital photo frames. The structure of the display device will be specifically described below using a television as an example.

[0069] Please see Figure 1 and Figure 2 , Figure 2 This is a cross-sectional view of the display device in one exemplary embodiment of this application. The display device 100 provided in this application includes a display module 11, which is used to display image information for user viewing. The display module 11 may include, but is not limited to, a liquid crystal display (LCD), an organic light-emitting diode (OLED), or other display screens capable of displaying images; this application does not specifically limit the implementation of such displays.

[0070] In some embodiments, the display device 100 provided in this application includes a back plate 12, which covers the back side of the display module 11 in the thickness direction f1 of the display device 100. That is, the back plate 12 is disposed on the rear side of the display module 11 in the thickness direction f1 of the display device 100. The back plate 12 locks and fixes the display module 11 from the back side of the display module 11, thereby supporting the display module 11.

[0071] In some embodiments, the display device 100 provided in this application also includes a rear shell 13, which is disposed on the side of the back panel 12 away from the display module 11, and serves to protect and decorate.

[0072] In some embodiments, the display device 100 provided in this application includes a circuit board 14, which is disposed on the side of the back plate 12 away from the display module 11 and located between the back plate 12 and the rear cover 13. In this way, the circuit board 14 can be covered and shielded by the rear cover 13 to protect the circuit board 14, thereby achieving the effects of waterproofing, dustproofing and contact protection.

[0073] Optionally, the rear cover 13 is detachably fitted onto the back of the back panel 12 so that the circuit board 14 on the back of the back panel 12 can be repaired and inspected after the rear cover 13 is removed.

[0074] As an example, circuit board 14 can be a power supply board, which is used to connect to an external power source, such as AC mains, to convert 220V AC mains power into power available to other circuit boards 14. Specifically, the power supply board may be equipped with devices such as transformers and rectifiers, and also has live wire terminals and neutral wire terminals respectively connected to the live wire and neutral wire.

[0075] In another exemplary embodiment, circuit board 14 may be a driver board, which is mainly used to process and drive the display module 11 of display device 100 to display images and videos. The driver board may include a source board, a TCON board (timing controller), etc. The source board is mainly used to convert instructions to adjust the display module, while the TCON board is mainly responsible for converting video signals into drive signals.

[0076] In another exemplary embodiment, circuit board 14 includes a power supply board and a driver board. The power supply board is used to connect to an external power source, such as AC mains, and convert the 220-volt AC mains power into a power source usable by other circuit boards 14. Specifically, the power supply board may be equipped with devices such as transformers and rectifiers, and also has live wire terminals and neutral wire terminals respectively connected to the live wire and neutral wire. The driver board is mainly used to process and drive the display module 11 of the display device 100 to display images and videos. The driver board may include a source board, a TCON board (timing controller), etc. The source board is mainly used to convert instructions to adjust the display module, and the TCON board is mainly responsible for converting video signals into drive signals.

[0077] In some embodiments, such as Figure 2 As shown, the display device 100 provided in this application embodiment includes a flame-retardant and fireproof structure 15, which is disposed between the back plate 12 and the rear shell 13. The flame-retardant and fireproof structure 15 covers the circuit board 14, and the projected area of ​​the flame-retardant and fireproof structure 15 on the back plate 12 is smaller than the projected area of ​​the rear shell 13 on the back plate 12.

[0078] That is, in the display device 100 provided in this application embodiment, a flame-retardant fireproof structure 15 is provided on the inner side of the back cover 13 to cover the circuit board 14, thereby achieving a flame-retardant effect on the circuit board 14, thus ensuring the safety of the display device 100. This allows the back cover 13 to meet safety requirements without using flame-retardant materials or high-grade flame-retardant materials. In this application, only the flame-retardant fireproof structure 15 covering the circuit board 14 can use high-cost flame-retardant materials with high flame-retardant grades. Since the projected area of ​​the flame-retardant fireproof structure 15 on the back plate 12 is smaller than the projected area of ​​the back cover 13 on the back plate 12, and the size of the flame-retardant fireproof structure 15 is smaller than the size of the back cover 13, compared to using high-cost flame-retardant materials for the entire back cover 13, the use of high-cost flame-retardant materials with high flame-retardant grades is reduced, thereby significantly reducing the overall cost of the display device 100.

[0079] In some embodiments, the flame-retardant fireproof structure 15 may be a flame-retardant fireproof cloth, which is attached to the surface of the rear shell 13 facing the back panel 12.

[0080] Since flame-retardant and fireproof cloth is usually quite soft, using it as the flame-retardant and fireproof structure 15 allows for a flexible contact between the flame-retardant and fireproof structure 15 and the back shell 13, avoiding a rigid contact. Furthermore, the flame-retardant and fireproof cloth can absorb and buffer the vibration of the back shell 13 to a certain extent, thus solving the vibration and noise problems caused by the rigid contact between the flame-retardant and fireproof structure 15 and the back shell 13. This helps to improve the sound output of the display device 100 and enhance the user's auditory experience.

[0081] As can be seen, the display device 100 provided in this application embodiment can solve the vibration and noise problems caused by the rigid contact between the flame-retardant fireproof structure 15 and the rear shell 13 while taking into account flame-retardant performance and low cost, thereby helping to improve the sound output effect of the display device 100 and enhance the user's auditory experience.

[0082] In addition, since the flame-retardant and fireproof cloth can be made relatively thin, the distance between the back plate 12 and the flame-retardant and fireproof cloth can be kept relatively large even with the limited space between the back plate 12 and the back shell 13, forming a large heat dissipation vent, which facilitates convection heat dissipation. This solves the problem of heat convection obstruction caused by the small gap between the flame-retardant and fireproof structure 15 and the back shell 13, thereby helping to improve the heat dissipation effect of the circuit board 14.

[0083] Specifically, if a flame-retardant and fireproof plastic cover is used as the flame-retardant and fireproof structure 15, its processing method is usually injection molding. However, injection molding has certain limitations, and the thickness of the processed product is relatively thick. Therefore, the thickness of the flame-retardant and fireproof plastic cover cannot be made thin. Under normal circumstances, the minimum thickness of the flame-retardant and fireproof plastic cover is about 1.0mm. Under the premise of meeting the thin and light design of the display device 100, that is, under the limited space between the back plate 12 and the back shell 13, the heat dissipation vent between the back plate 12 and the flame-retardant and fireproof plastic cover will become smaller, causing heat convection obstruction, thereby affecting the heat dissipation of the circuit board 14 and resulting in poor heat dissipation effect of the circuit board 14.

[0084] When flame-retardant and fireproof cloth is used as the flame-retardant and fireproof structure 15, its thickness can be relatively thin. For example, the thickness d of the flame-retardant and fireproof cloth can be 0.05mm-0.2mm, such as d=0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm or 0.2mm, etc.

[0085] Controlling the thickness d of the flame-retardant and fireproof cloth within the range of 0.05mm-0.2mm indicates that the thickness of the flame-retardant and fireproof cloth is relatively thin. This allows for a relatively large distance between the back plate 12 and the flame-retardant and fireproof cloth, even with limited space between them, thus forming a larger heat dissipation vent and facilitating convection heat dissipation. This solves the problem of heat convection obstruction caused by the small gap between the flame-retardant and fireproof structure 15 and the back shell 13, thereby helping to improve the heat dissipation effect of the circuit board 14.

[0086] As consumers increasingly prefer larger screens, the size of display devices 100 is getting larger and larger, requiring higher strength from the back cover 13. Typically, ribs are added to the surface of the back cover 13 facing the back plate 12. However, the flame-retardant and fireproof cloth in this application has good flexibility. Even if ribs or reinforcing protrusions are provided at the location where the flame-retardant and fireproof cloth is set, the flame-retardant and fireproof cloth can still be seamlessly attached to the surface of the back cover 13 facing the back plate 12, with good interface adhesion. This allows the flame-retardant and fireproof cloth to make full use of the space between two adjacent ribs to increase the heat dissipation vents, thereby helping to improve the heat dissipation effect of the circuit board 14.

[0087] In some embodiments, the flame-retardant and fireproof fabric in this application can be understood as a heat-insulating and flame-resistant fiber fabric layer. The material of the flame-retardant and fireproof fabric can be a blended fabric of one or more of glass fiber, polytetrafluoroethylene fiber, aramid fiber, and basalt fiber. The blended fabric can be understood as a fabric woven from yarns made by blending two or more different types of fibers.

[0088] Using the aforementioned fibers as the material for the flame-retardant and fireproof cloth, it can effectively resist high temperatures and maintain its shape when the circuit board 14 catches fire. Even if the circuit board 14 catches fire for a period of time, such as 1 minute, the flame-retardant and fireproof cloth will not produce holes. This can effectively isolate and delay the flame, reduce the risk of flame spread, and play an effective fire protection role.

[0089] In some embodiments, such as Figure 3 As shown, a ceramicized silicone rubber layer 16 is provided on the surface of the flame-retardant and fireproof cloth facing the circuit board 14. Thus, when the circuit board 14 catches fire, the ceramicized silicone rubber layer 16 can be used to block the flame from passing through the fabric gaps of the flame-retardant and fireproof cloth, thereby reducing the risk of the flame spreading to the back cover 13 and igniting the back cover 13.

[0090] In some embodiments, the flame-retardant and fireproof cloth can be fixed to the surface of the back cover 13 facing the back plate 12 of the flame-retardant and fireproof structure 15 by adhesive.

[0091] The flame-retardant and fireproof cloth is fixed to the back shell 13 by adhesive bonding. This allows the entire surface of the flame-retardant and fireproof cloth to be coated with adhesive, ensuring that any part of the cloth can be connected and fixed to the back shell 13. This achieves a seamless connection with a large connection area, thereby improving the stability of the flame-retardant and fireproof cloth on the back shell 13. The process is simple and efficient.

[0092] For example, flame-retardant and fireproof cloth can be bonded to the back cover 13 by hot melt adhesive, water-based adhesive, double-sided tape, etc.

[0093] In some embodiments, such as Figure 4 As shown, the display device 100 also includes a flame-retardant fireproof baffle 17, which is disposed between the back panel 12 and the rear shell 13, and is located below the circuit board 14, covering the circuit board 14. This allows the flame-retardant fireproof baffle 17 to prevent flames from falling off the circuit board 14 when it catches fire, thus isolating and delaying the flames and further reducing the risk of flame spread.

[0094] In some embodiments, the flame-retardant fireproof baffle 17 may abut against the back plate 12 and the rear shell 13 respectively, and the flame-retardant fireproof baffle 17 may also abut against the flame-retardant fireproof cloth. This can prevent the flames from spreading from the gaps between the flame-retardant fireproof baffle 17 and the back plate 12, the gap between the flame-retardant fireproof baffle 17 and the rear shell 13, and the gap between the flame-retardant fireproof baffle 17 and the flame-retardant fireproof cloth when the circuit board 14 catches fire, thereby helping to improve the safety of the display device 100.

[0095] Optionally, the flame retardant rating of the material of the flame-retardant fireproof baffle 17 may be V1 or V0 as required by the UL94 standard.

[0096] Optionally, the material of the flame-retardant fireproof baffle 17 may include: acrylonitrile-butadiene-styrene material (i.e. ABS material), a polymer material of acrylonitrile-butadiene-styrene and polycarbonate (i.e. ABS material with added PC, also known as PC+ABS), or a polymer material of acrylonitrile-butadiene-styrene and polypropylene (i.e. ABS material with added PP, also known as PP+ABS), etc.

[0097] In some embodiments, the material of the back cover 13 may be a flame-retardant material, and the flame-retardant rating of the material of the back cover 13 is lower than that of the flame-retardant fireproof cloth. This allows the back cover 13 to have a certain degree of flame-retardant performance while maintaining a low cost. Thus, the flame-retardant fireproof cloth and the back cover 13 can provide a dual flame-retardant effect on the circuit board 14, thereby improving the flame-retardant performance of the display device 100 and further enhancing the safety of the display device 100.

[0098] The flame retardant rating is configured as follows: a rating arranged in descending order of fire resistance performance, determined according to the same standard (e.g., UL94 standard).

[0099] Optionally, the flame retardant rating of the flame-retardant fabric can be V1 or V0 as required by the UL94 standard, and the flame retardant rating of the back shell 13 can be HB (specifically HB75) or V2 as required by the UL94 standard.

[0100] For example, the material of the back cover 13 may include impact-resistant polystyrene material (i.e., HIPS material).

[0101] In some embodiments, such as Figure 4 and Figure 5 As shown, the back cover 13 may include a first housing 131 and a second housing 132. The first housing 131 is detachably disposed on the side of the back plate 12 away from the display module 11, and the first housing 131 has a clearance hole 1311 for exposing the circuit board 14. The second housing 132 is disposed on the side of the back plate 12 away from the display module 11 and is located below the first housing 131. The second housing 132 is partially located inside the clearance hole 1311 to cover the circuit board 14.

[0102] The flame-retardant and fireproof cloth is at least partially disposed in the portion of the second housing 132 located within the clearance hole 1311. That is, the flame-retardant and fireproof cloth may be disposed only in the portion of the second housing 132 located within the clearance hole 1311, or the flame-retardant and fireproof cloth may be disposed not only in the portion of the second housing 132 located within the clearance hole 1311, but may also extend to the portion of the second housing 132 located outside the clearance hole 1311.

[0103] In the above design scheme, the back cover 13 adopts a split first cover 131 and a second cover 132, and the first cover 131 is detachably mounted on the back plate 12. Compared with the integrated back cover 13, the first cover 131 can be configured according to the actual needs of the market. When the first cover 131 is not required, the cost of the back cover 13 can be saved, which helps to reduce the cost of the display device 100.

[0104] In addition, since this application uses flame-retardant and fireproof cloth to isolate and delay the flame when the circuit board 14 catches fire, the first shell 131 and the second shell 132 can be made of the same material, so that the colors of the first shell 131 and the second shell 132 can be roughly consistent, thereby weakening the color difference problem caused by splicing the first shell 131 and the second shell 132.

[0105] In some embodiments, such as Figure 4 , Figure 6 and Figure 7As shown, the clearance hole 1311 has a notch (not shown) on the bottom wall of the display device 100 in the height direction f3. The portion of the second housing 132 outside the clearance hole 1311 has a mounting opening 1321. The rear housing 13 may also include a flame-retardant fireproof shell 133, which is disposed at the mounting opening 1321 and is at least partially located on the underside of the circuit board 14, covering the circuit board 14. Thus, the flame-retardant fireproof shell 133 can prevent flames from falling off when the circuit board 14 catches fire, thereby isolating and delaying the flames and further reducing the risk of flame spread.

[0106] Furthermore, since the flame-retardant fireproof shell 133 is at least partially located on the underside of the circuit board 14, that is, the entire flame-retardant fireproof shell 133 can be located on the underside of the circuit board 14. This solution makes the flame-retardant fireproof shell almost invisible from the rear side of the display device 100, thereby solving the color difference problem caused by splicing the flame-retardant fireproof shell 133 and the second shell 132. Alternatively, one part of the flame-retardant fireproof shell 133 can be located on the underside of the circuit board 14, and the other part can be located on the side of the circuit board 14 facing away from the back panel 12. Due to the presence of the flame-retardant fireproof cloth, the part of the flame-retardant fireproof shell 133 located on the side of the circuit board 14 facing away from the back panel 12 does not need to extend to cover the circuit board 14, reducing the area of ​​the flame-retardant fireproof shell 133. This can weaken the color difference problem caused by splicing the flame-retardant fireproof shell 133 and the second shell 132. Moreover, the second shell 132 is a one-piece molded shell structure, which improves the production efficiency of the back shell 13 and the efficiency of the overall assembly of the display device 100.

[0107] It should be noted that in some embodiments, since the flame-retardant fireproof shell 133 can be used to prevent the flames from falling when the circuit board 14 catches fire, the flame-retardant fireproof baffle 17 does not need to be provided on the lower side of the circuit board 14. This allows the connection wiring of the circuit board 14 to be unobstructed by the flame-retardant fireproof baffle 17, reducing the wiring difficulty of the circuit board 14.

[0108] Of course, it is understandable that in other embodiments, the flame-retardant fireproof baffle 17 and the flame-retardant fireproof shell 133 can coexist. When both coexist, the flame-retardant fireproof baffle 17 and the flame-retardant fireproof shell 133 can provide a dual flame-retardant effect on the circuit board 14, thereby improving the flame-retardant performance of the display device 100 and further enhancing the safety of the display device 100.

[0109] Optionally, the flame retardant rating of the material of the flame-retardant fireproof shell 133 may be V1 or V0 as required by the UL94 standard.

[0110] Optionally, the material of the flame-retardant and fireproof shell 133 may include: acrylonitrile-butadiene-styrene material (i.e. ABS material), a polymer material of acrylonitrile-butadiene-styrene and polycarbonate (i.e. ABS material with added PC, also known as PC+ABS), or a polymer material of acrylonitrile-butadiene-styrene and polypropylene (i.e. ABS material with added PP, also known as PP+ABS), etc.

[0111] For example, the first housing 131 can be fixed to the back plate 12 by means of clips, screws, bolts, etc. The second housing 132 can also be fixed to the back plate 12 by means of clips, screws, bolts, etc. The flame-retardant fireproof cover can also be fixed to the back plate 12 by means of clips, screws, bolts, etc.

[0112] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0113] Furthermore, the embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the content of this specification should not be construed as a limitation of this application, and the protection scope of this application should be determined by the appended claims.

Claims

1. A display device, characterized in that, The display device includes: Display module; A back panel that covers the back of the display module; The rear shell is disposed on the side of the back panel opposite to the display module; A circuit board, the circuit board being disposed on the side of the back plate opposite to the display module, and located between the back plate and the rear cover; and, A flame-retardant and fireproof structure is disposed between the back plate and the rear shell, the flame-retardant and fireproof structure covers the circuit board, and the projected area of ​​the flame-retardant and fireproof structure on the back plate is smaller than the projected area of ​​the rear shell on the back plate. The flame-retardant and fireproof structure is a flame-retardant and fireproof cloth, which is attached to the surface of the rear shell facing the back plate.

2. The display device according to claim 1, characterized in that, The thickness of the flame-retardant and fireproof cloth is 0.05mm-0.2mm.

3. The display device according to claim 1, characterized in that, The flame-retardant and fireproof cloth is made of one or more of the following materials: glass fiber, polytetrafluoroethylene fiber, aramid fiber, and basalt fiber.

4. The display device according to claim 1, characterized in that, The flame-retardant and fireproof cloth has a ceramicized silicone rubber layer on its surface facing the circuit board.

5. The display device according to claim 1, characterized in that, The flame-retardant and fireproof cloth is fixed to the surface of the rear shell facing the back panel by adhesive.

6. The display device according to claim 1, characterized in that, The display device also includes a flame-retardant and fireproof baffle, which is disposed between the back plate and the rear shell, and is located on the underside of the circuit board and covers the circuit board.

7. The display device according to claim 6, characterized in that, The flame-retardant and fireproof baffles abut against the back plate and the rear shell respectively, and the flame-retardant and fireproof baffles also abut against the flame-retardant and fireproof cloth.

8. The display device according to any one of claims 1-7, characterized in that, The rear shell includes: A first housing, detachably disposed on the side of the back panel opposite to the display module, and the first housing having a clearance hole for exposing the circuit board; and, The second housing is disposed on the side of the back panel away from the display module and located below the first housing. The second housing is partially located within the clearance hole to cover the circuit board. The flame-retardant and fireproof cloth is at least partially disposed on the portion of the second housing located within the clearance hole.

9. The display device according to claim 8, characterized in that, The clearance hole has a notch on the bottom wall in the height direction of the display device, and the portion of the second housing outside the clearance hole has a mounting opening; The rear shell also includes a flame-retardant and fireproof shell, which is disposed at the mounting opening and is at least partially located on the underside of the circuit board, covering the circuit board.

10. The display device according to any one of claims 1-7, characterized in that, The back cover is made of flame-retardant material, and the flame-retardant rating of the back cover material is lower than that of the flame-retardant and fireproof cloth material.

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