Bezel, method of manufacturing the same, and display device

Abstract

The application provides a frame, a preparation method of the frame and a display device. The frame comprises: a middle frame having an inner cavity, the middle frame comprising a first frame body and a second frame body connected to each other, and a bending corner formed at the connection of the first frame body and the second frame body; and a decorative texture layer arranged on the outer surface of the middle frame and continuously distributed at the bending corner. The frame can realize a continuous and non-cracking appearance decoration effect.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a frame, a method for manufacturing the frame, and a display device. Background Technology

[0002] Currently, televisions, commercial displays, and other products with a picture frame effect often use decorative borders to enhance their appearance. The existing method involves creating a one-piece bent inner frame as a support, and then magnetically attaching a textured, spliced ​​border to the surface. While this method achieves a decorative effect, gaps exist at the corners, resulting in discontinuous textures and affecting the overall appearance.

[0003] Therefore, how to achieve a continuous texture and crack-free decorative effect on the border is still a problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a frame, a method for preparing the frame, and a display device. The frame can achieve a decorative effect with continuous texture and no cracks.

[0005] This application provides a border, including: The middle frame has an inner cavity and includes a first frame and a second frame that are connected to each other. A bend and corner are formed at the connection between the first frame and the second frame. A decorative texture layer is disposed on the surface of the middle frame, and the decorative texture layer is continuously distributed at the bends and corners.

[0006] In some embodiments, the decorative texture layer includes a base film layer and an ink layer, the base film layer covering the middle frame and the ink layer disposed on the base film layer.

[0007] In some embodiments, the base film layer is formed by curing a polyester composition comprising a polyester resin and a curing agent, wherein the mass ratio of the polyester resin to the curing agent is 90:10 to 95:5.

[0008] In some embodiments, the polyester composition further includes titanium dioxide, a leveling agent, a brightening agent, benzoin, wax powder, a plasticizer, and a catalyst. The polyester composition, by weight, comprises: 65-75 parts of the polyester resin and curing agent, 25-30 parts of the titanium dioxide, 0.05-0.2 parts of the leveling agent, 0.05-0.2 parts of the brightening agent, 0.05-0.2 parts of the benzoin, 0.05-0.2 parts of the wax powder, 0.05-0.2 parts of the plasticizer, and 0.3-0.5 parts of the catalyst.

[0009] In some embodiments, the curing agent is triglycidyl isocyanurate or hydroxyalkylamide.

[0010] In some embodiments, the first frame includes a first bottom surface and a first side surface, the first bottom surface being connected to the first side surface; the second frame includes a second bottom surface and a second side surface, the second bottom surface being connected to the second side surface; the first bottom surface being connected to the second bottom surface; the end of the first side surface near the bend corner is a first inclined surface; the end of the second side surface near the bend corner is a second inclined surface; the first inclined surface and the second inclined surface are in contact with each other.

[0011] In some embodiments, the first frame and the second frame are welded together at the point where the first inclined surface and the second inclined surface meet, by means of the first side surface and the second side surface near the inner cavity.

[0012] In some embodiments, the elongation at break of the middle frame is greater than or equal to 22%.

[0013] In some embodiments, the material of the middle frame is an iron-based alloy.

[0014] In some embodiments, the iron-based alloy is one of SUS430, SUS304, SECC, SGCC or SPCC.

[0015] This application embodiment also provides a method for preparing a border, used for the aforementioned border, the method for preparing the border comprising: A profile is provided, the profile being made of an iron-based alloy, and the profile having an internal cavity; A decorative texture layer is formed on the surface of the profile; The profile having the decorative texture layer is bent to form a frame with bent corners.

[0016] In some embodiments, before forming a decorative texture layer on the surface of the profile, the method further includes: forming a notch at a predetermined bending position of the profile along a direction perpendicular to the length of the profile, wherein the notch has a first inclined surface and a second inclined surface on both sides; Bending the profile with the decorative texture layer to form a frame with a bend corner includes: bending the profile with the decorative texture layer so that the first inclined surface and the second inclined surface fit together to form a middle frame with a bend corner.

[0017] In some embodiments, a decorative texture layer is formed on the surface of the profile, and the method for preparing the border includes: forming a base film layer on the surface of the profile; and forming an ink layer on the base film layer.

[0018] In some embodiments, a base film layer is formed on the surface of the profile, and the method for preparing the frame includes: coating the profile with a polyester composition and curing the polyester composition to form a base film layer; forming an ink layer on the base film layer, and the method for preparing the frame includes: performing heat transfer printing on the base film layer to form an ink layer.

[0019] This application also provides a display device including the above-described frame, or a frame made by the above-described frame preparation method.

[0020] The frame, its fabrication method, and display device provided in this application include a middle frame and a decorative texture layer. The middle frame has an inner cavity. The middle frame includes a first frame and a second frame connected to each other, with a bend forming a corner at the connection point. The decorative texture layer is disposed on the surface of the middle frame and is continuously distributed at the bend. The frame provided in this application achieves a continuous, complete, and crack-free decorative effect while providing a supporting function, effectively solving the problems of texture loss and cracking at bends in traditional solutions. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of 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.

[0022] Figure 1 This is a schematic diagram of the first structure of the border provided in an embodiment of this application.

[0023] Figure 2 This is a schematic diagram of the structure of the middle frame provided in an embodiment of this application.

[0024] Figure 3 This is a schematic diagram of a second structure of the border provided in an embodiment of this application.

[0025] Figure 4 This is a schematic diagram of the first process of a method for preparing a border according to an embodiment of this application.

[0026] Figure 5 This is a schematic diagram of the profile provided in an embodiment of this application.

[0027] Figure 6 This is a schematic diagram of the first process flow for the preparation method of the border provided in the embodiments of this application.

[0028] Figure 7 This is a schematic diagram of a second process flow for the preparation method of the border provided in the embodiments of this application.

[0029] Figure 8 This is a schematic diagram of a second process for preparing a border according to an embodiment of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] With the continuous development of display technology, products such as televisions, commercial displays, and educational devices that resemble artistic picture frames are gradually gaining market favor. To enhance the aesthetic appeal of these products, the industry commonly uses decorative borders around the display device to achieve a frame-like appearance. Currently, the mainstream technologies for achieving such decorative borders still have certain limitations.

[0032] In existing technologies, a common approach is to use a splicing structure. This method typically involves first fabricating a single, bent metal inner frame as a structural support, then attaching a decoratively textured spliced ​​border to the outer surface of the inner frame using magnetic or snap-fit ​​methods. However, this approach suffers from seams at the corners of the decorative border, making it difficult to create a continuous and seamless surface texture, thus affecting the overall aesthetic integrity. Furthermore, the need to separately fabricate the inner frame and the decorative border, along with the added assembly steps, results in higher manufacturing costs.

[0033] To address the aforementioned issues of seam gaps and overall aesthetics, the industry has explored various improved processes. One typical approach involves using extruded aluminum profiles, bending them into the desired three-sided frame shape, and then applying surface coating and heat transfer printing to create decorative textures. Another method involves first coating and heat transferring the aluminum extruded profiles, followed by bending.

[0034] However, the above-mentioned improvement schemes still have inherent defects in practical applications.

[0035] For the process of bending before transferring, the heat transfer paper or film has a large tension during the heating and transfer process, which makes it impossible to completely and tightly adhere to curved surfaces such as bends and corners. This results in problems such as missing, incomplete or blurry textures at the corners, which can only meet the requirements of products with low appearance quality.

[0036] The process of transferring the image before bending is limited by the inherent material properties of aluminum extrusion profiles (such as Al6063-T5). This type of aluminum has a low elongation at break (typically only around 8%), making the corner highly susceptible to cracking due to stress concentration during 90° right-angle bends. This leads to the cracking and peeling of the transferred image layer, severely impacting the product's appearance and structural strength. Therefore, this method is generally only suitable for scenarios with larger bending angles (>120°) and cannot meet the decorative requirements of right-angle bends.

[0037] Based on the above technical background, embodiments of this application provide a frame, a method for preparing the frame, and a display device. The frame can achieve a continuous texture and crack-free decorative effect. The following description is in conjunction with the specific accompanying drawings.

[0038] Please see Figure 1 as well as Figure 2 , Figure 1 This is a schematic diagram of the first structure of the border provided in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of the middle frame provided in an embodiment of this application.

[0039] This application provides a border 1. The border 1 includes a middle frame 11 and a decorative texture layer.

[0040] The middle frame 11 has an inner cavity 111. This inner cavity 111 is used to accommodate the edge area of ​​the film assembly or the edge area of ​​the display module in the display device, thereby positioning and limiting the components. The inner cavity 111 is formed by the bottom wall and side walls of the middle frame 11, and its size matches the edge thickness of the film assembly or display module, ensuring that the components are firmly embedded after assembly and preventing loosening or displacement. At the same time, the inner cavity 111 also provides space for the insertion of temporary reinforcing fixtures during the manufacturing process, facilitating a process path of surface treatment followed by bending, and ensuring the integrity of the surface texture.

[0041] Please see Figure 3 , Figure 3 A schematic diagram of a second type of frame structure (including a beveled structure) provided for an embodiment of this application.

[0042] The middle frame 11 includes a first frame 112 and a second frame 113 that are connected to each other, and a bend is formed at the connection between the first frame 112 and the second frame 113. The first frame 112 and the second frame 113 are integrally formed, that is, they are formed by bending the same profile at a predetermined position, without any splicing or welding marks between them, thus ensuring the continuity of the structure and the consistency of the appearance at the corner. The angle of the bend is determined according to the design requirements of the display device, and is usually a right angle structure of 90° or close to 90° to meet the requirements of narrow bezel 1 and right angle appearance.

[0043] The middle frame 11 also includes a third frame. The first frame 112, the second frame 113, and the third frame are connected sequentially, integrally formed, and angled to each other to form a U-shaped structure. For example, the first frame 112 is perpendicular to the second frame 113, and the second frame 113 is perpendicular to the third frame, together forming a U-shaped structure. This U-shaped structure is suitable for the three-sided bezel design of the display device, such as the top and left and right sides.

[0044] In other embodiments, the middle frame 11 may also include a fourth frame. The fourth frame is connected to the first frame 112 and the third frame respectively, and together with the aforementioned first, second and third frames, they enclose a complete middle frame 11 (i.e., a rectangular frame), which is suitable for the four-sided full-edge design of the display device.

[0045] It should be noted that, for ease of description, this application mainly uses the first frame 112 and the second frame 113 as examples to illustrate the structural features and forming method of the bending corner, but this description should not be construed as a limitation on the scope of protection of this application, that is, the technical solution of this application is also applicable to the complete middle frame 11 structure containing three or four frames.

[0046] The decorative texture layer is applied to the outer surface of the middle frame 11. The decorative texture layer is continuously distributed at the bends and corners without any missing or incomplete areas. In other words, while fulfilling the supporting function of the middle frame 11, a continuous, complete, and crack-free decorative effect is achieved, effectively solving the problem of texture loss and cracking at bends and corners in traditional solutions.

[0047] The elongation at break of the middle frame 11 is greater than or equal to 22%. The elongation at break of aluminum extruded profiles is often 8%, so during bending, the middle frame 11 can withstand large plastic deformation without cracking, thus avoiding the problem of surface decorative texture layer cracking caused by the fracture of the middle frame 11.

[0048] The material of the middle frame 11 is an iron-based alloy. Compared with the aluminum extrusion profiles (such as Al6063-T5) commonly used in traditional solutions, iron-based alloys have superior plastic processing properties, thereby avoiding the problem of surface decorative texture layer cracking caused by the fracture of the middle frame 11.

[0049] In some embodiments, the iron-based alloy is one of SUS430, SUS304, SECC (electro-galvanized steel sheet), SGCC (hot-dip galvanized steel sheet), or SPCC (cold-rolled steel sheet). Among them, SUS430 and SUS304 belong to the stainless steel series, and in addition to meeting the elongation requirements, they also have good corrosion resistance, making them suitable for applications with high weather resistance requirements; SECC, SGCC, and SPCC have cost advantages and can also achieve a breaking elongation of more than 22%, such as SECC, whose typical elongation is between 22% and 28%.

[0050] In some embodiments, the middle frame 11 can be a structure with uniform thickness, and the thickness of the middle frame 11 can be from 0.5mm to 2mm, for example 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm.

[0051] In some embodiments, the decorative texture layer includes a base film layer and an ink layer, the base film layer covering the middle frame 11 and the ink layer disposed on the base film layer. It is understood that the base film layer serves to connect the middle frame 11 and the ink layer, thereby improving the adhesion of the ink to the middle frame 11.

[0052] The base film layer is cured from a polyester composition. Considering that the middle frame 11 needs to be bent after the decorative texture layer is applied, the base film layer must have good flexibility to prevent cracking during bending.

[0053] The polyester composition includes a polyester resin and a curing agent. In some embodiments, the polyester resin may be a carboxyl-terminated polyester resin, whose active functional groups undergo a crosslinking reaction with the curing agent to form a three-dimensional network structure with appropriate flexibility. The curing agent may be triglycidyl isocyanate or a hydroxyalkylamide.

[0054] More specifically, the mass ratio of polyester resin to curing agent is 90:10 to 95:5. If the proportion of curing agent is too high, the cross-linking density of the base film layer is too large, increasing brittleness and making it prone to cracking when bent; if the proportion is too low, the hardness of the base film layer is insufficient, making it easy to scratch and affecting the adhesion quality of the ink layer. The mass ratio range of polyester resin to curing agent provided in this application can take into account both hardness and flexibility.

[0055] Furthermore, the polyester-based composition also includes titanium dioxide, leveling agent, brightening agent, benzoin, wax powder, plasticizer, and catalyst. The polyester-based composition, by weight, comprises: polyester resin and curing agent: 65-75 parts, titanium dioxide: 25-30 parts, leveling agent: 0.05-0.2 parts, brightening agent: 0.05-0.2 parts, benzoin: 0.05-0.2 parts, wax powder: 0.05-0.2 parts, plasticizer: 0.5-0.8 parts, and catalyst: 0.3-0.5 parts.

[0056] The polyester composition can form a coating on the middle frame 11, and the coating forms a base film layer after it is fixed.

[0057] Titanium dioxide is mainly used for masking and color adjustment.

[0058] Leveling agents are used to reduce the surface tension of the coating, promote the uniform spreading of molten paint on the surface of the middle frame 11, and eliminate surface defects such as orange peel and pinholes. Optional leveling agents include acrylate homopolymers and copolymers, or silicone-modified acrylate homopolymers and copolymers.

[0059] Gloss enhancers are used to improve the gloss of coatings and give the ink layer a more textured feel. Suitable gloss enhancers include copolymers of acrylates and methacrylic acid.

[0060] Benzoin acts as a degassing agent, releasing gas during the coating curing process. This causes air bubbles inside the coating to escape, preventing pinholes and crater-like defects and ensuring the density of the coating.

[0061] Wax powder is used to improve the smoothness and abrasion resistance of the coating surface, while also providing a certain degree of matting effect. Polyethylene wax, polypropylene wax, or polytetrafluoroethylene modified wax can be selected. The content of wax powder needs to be carefully controlled; excessive content hinders coating flow and reduces the coating's bending resistance.

[0062] Plasticizers are used to improve the flexibility of coatings, allowing them to stretch synchronously with the metal substrate without cracking when bent at right angles. Plasticizers can be phthalate plasticizers, such as dioctyl phthalate (DOP) or diisononyl phthalate (DINP).

[0063] Catalysts are used to accelerate the curing reaction and improve the problem of incomplete curing caused by uneven oven temperature during baking. Suitable catalysts include quaternary ammonium salts (such as benzyl ammonium bromide) or quaternary phosphonium salts.

[0064] The thickness of the base film layer can be 40μm to 80μm, which is beneficial to the uniformity of subsequent ink layer coating. This thickness range ensures both sufficient hiding power and facilitates uniform penetration and adhesion when the ink layer is applied. The base film layer prepared from the polyester-based composition in the above proportion matches the good elongation of the iron-based alloy frame 11, ensuring that the decorative texture layer does not crack or peel off after bending.

[0065] Structurally, the first frame 112 includes a first bottom surface and a first side surface, which are connected to form its cross-sectional shape, such as a U-shape, C-shape, or T-shape. Similarly, the second frame 113 includes a second bottom surface and a second side surface, which are connected to each other.

[0066] The first bottom surface is connected to the second bottom surface, and the first bottom surface and the second bottom surface form an angle with each other. The end of the first side surface near the bending corner is the first inclined surface 1121, and the end of the second side surface near the bending corner is the second inclined surface 1131. The first inclined surface 1121 and the second inclined surface 1131 fit together to form a tight contact. It can be understood that the fit of the inclined surfaces can self-position the bending angle, and the first side surface and the second side surface are coplanar after bending, avoiding misalignment or steps caused by bending springback, thereby ensuring the flatness of the appearance surface of the frame 1.

[0067] To further enhance stability, the first frame 112 and the second frame 113 are welded together at the joint of the first inclined surface 1121 and the second inclined surface 1131, using the first side surface to the second side surface. Since the decorative texture layer has been applied before welding, the high temperature during welding will locally ablate the decorative texture layer. However, this location is within the inner cavity 111 rather than the outer surface, and therefore does not affect the appearance of the frame 1. This welding method effectively eliminates the springback stress that may exist from simply bending and forming, ensuring that the middle frame 11 maintains a stable shape during subsequent use.

[0068] It is understood that, in this embodiment, the outer surface of the middle frame 11 refers to the external appearance surface 115 of the middle frame 11, which is the surface exposed to the outside and visible when the middle frame 11 is installed in the display device. Correspondingly, in this embodiment, the inner surface of the middle frame 11 refers to the non-exterior appearance surface 116 of the middle frame 11, which is the surface of the middle frame 11 disposed inside the display device and covered and not visible during use.

[0069] Please see Figure 4 , Figure 4 This is a schematic diagram of the first process of a method for preparing a border according to an embodiment of this application.

[0070] This application provides a method for preparing a border 1, used to prepare the border 1 in the above embodiments. The method for preparing the border 1 includes the following steps.

[0071] S100. A profile is provided, the material of which is an iron-based alloy, and the profile has an inner cavity 111.

[0072] In this step, the profile can be obtained through a roll forming process. Specifically, the iron-based alloy coil is cut into the required width and continuously cold-bent using roll forming equipment to obtain a profile with a specific cross-sectional shape. Compared to aluminum extrusion, roll forming has a higher material utilization rate and can maintain the characteristic of uniform material thickness, which is beneficial for uniform deformation during subsequent bending.

[0073] S200: A decorative texture layer is formed on the surface of the profile.

[0074] This step is performed before bending, when the profile is not yet bent, as a straight profile is conducive to the adhesion of the decorative texture layer.

[0075] S300, bend the profile with the decorative texture layer to form a frame 1 with bent corners.

[0076] The angle of the bend can be or is approximately a right angle.

[0077] Structurally, the bent profile forms the middle frame 11. As mentioned above, the middle frame 11 is made of an iron-based alloy, which can withstand large plastic deformation without cracking, thus avoiding the problem of the decorative texture layer cracking due to the fracture of the middle frame 11.

[0078] In some embodiments, to address the problem of wrinkles, breaks, or missing prints easily occurring on the outer surface 115 at the corners of the profile 2 during bending, this application provides further implementation schemes for pretreatment before bending and the structural formation method during the bending process. Please refer to... Figure 5 , Figure 5 The schematic diagram of the profile structure provided in this application embodiment (showing a V-shaped notch) shows that before forming a decorative texture layer on the surface of the profile 2, the method for preparing the frame 1 further includes: forming a notch 21 at a predetermined bending position of the profile 2 along a direction perpendicular to its length. The notch 21 has a first inclined surface 1121 and a second inclined surface 1131 on both sides. Thus, the shape of the notch 21 is similar to a V-shape. The process for forming the notch 21 can be punching.

[0079] With the notch 21 as the boundary, the profile 2 may include a first frame 112 and a second frame 113 that are interconnected. The first frame 112 includes a first bottom surface and a first side surface, with the first bottom surface connected to the first side surface. The second frame 113 includes a second bottom surface and a second side surface, with the second bottom surface connected to the second side surface. The first bottom surface is connected to the second bottom surface. The end of the first side surface near the bend corner is the first inclined surface 1121, and the end of the second side surface near the bend corner is the second inclined surface 1131.

[0080] The notch 21 serves the following purposes: First, it removes excess material that is compressed on the inside during bending, preventing the corner surface 115 from bulging or wrinkling due to material accumulation; second, by controlling the angle and depth of the notch 21, the angle after bending can be precisely defined; third, after the notch 21 is punched, a first inclined surface 1121 and a second inclined surface 1131 are naturally formed on both sides, and the first inclined surface 1121 and the second inclined surface 1131 will serve as mating surfaces that cooperate with each other during subsequent bending.

[0081] It should be noted that the punching process of the notch 21 is completed before surface treatment. After punching, the cross-section of the notch 21 is an exposed metal substrate. In the subsequent painting process, this cross-section will be painted together with the other surfaces of the profile 2 to form a complete decorative texture layer. This ensures that when the first bevel 1121 and the second bevel 1131 are closed after bending, the cross-sections have paint films in contact with each other, avoiding exposed metal. In other words, the cross-section at the closed notch 21 is covered with a decorative texture layer, presenting a "no white showing" appearance 115 effect, without the need for secondary painting.

[0082] The profile 2 with the decorative texture layer is bent to form a frame 1 with a bend corner, including: bending the profile 2 with the decorative texture layer at a preset bending position so that the first inclined surface 1121 and the second inclined surface 1131 fit together to form a middle frame 11 with a bend corner.

[0083] Compared to simple end-face contact, this beveled bonding structure has the following advantages: First, the beveled bonding surface increases the contact area between the two frames at the corner, improving structural stability; second, the beveled surface can self-position the bending angle, ensuring that the first and second sides are coplanar after bending, avoiding misalignment or steps caused by bending springback or positioning deviation; third, the beveled surface after bonding provides a flat operating surface for subsequent welding and fixing from the inner cavity 111, making the weld hidden on the inner surface (not the outer surface 116), and the outer surface 115 has no weld points or heat-affected zone.

[0084] After the above bending steps, the first inclined surface 1121 and the second inclined surface 1131 fit together to form a support structure at the bend corner. At the same time, the first frame 112 and the second frame 113 are connected through this corner to form an integral right-angle bent frame 11 with a continuous appearance surface 115. Since the surface treatment was completed before bending and the cross-section of the notch 21 was pre-painted, the texture of the appearance surface 115 at the corner is continuous and complete after the bend is closed, with no missing prints, no cracks, and no exposed metal.

[0085] In some embodiments, after bending the profile 2 with the decorative texture layer so that the first inclined surface 1121 and the second inclined surface 1131 are attached, the method for preparing the frame 1 includes welding and fixing the inner surface at the attachment point of the first inclined surface 1121 and the second inclined surface 1131.

[0086] Setting the welding position on the inner surface has significant advantages. If welding is performed on the outer surface 115, it will not only damage the existing decorative texture layer, but also require secondary processing such as grinding and repainting, increasing the complexity and cost of the process, and it is difficult to guarantee that the repaired appearance is completely consistent with the original texture. However, the inner surface is not an outer surface 116, so even if the paint film is locally ablated by the high temperature during the welding process, it will not affect the visual effect of the final product. At the same time, since the first inclined surface 1121 and the second inclined surface 1131 are closely attached after bending, the weld can be continuously applied along the attachment line to form a uniform and reliable connection.

[0087] For specific welding methods, laser welding can be used. Laser welding has advantages such as concentrated heat input, small heat-affected zone, aesthetically pleasing welds, and minimal deformation, enabling a strong connection without damaging the surrounding coating. Welding parameters can be adjusted according to the material thickness and type to ensure sufficient penetration and no incomplete welds.

[0088] After the above welding and fixing, the structural strength at the bending corner is significantly improved, and it can still maintain the bending state even when subjected to a certain external force or vibration; at the same time, there are no welding marks on the appearance surface 115, and the decorative texture remains complete and continuous.

[0089] In some embodiments, to address the problem that the elongated profile 2 experiences localized strength reduction after punching the notch 21, and is prone to twisting or deformation in subsequent processes, please refer to [reference needed]. Figure 6 as well as Figure 7 , Figure 6 A schematic diagram (cross-sectional view) of the first process flow of the frame fabrication method provided in the embodiments of this application. Figure 7 This is a schematic diagram (front view) of a second process flow for the preparation method of the frame provided in this application embodiment. Before surface treatment, this application introduces a detachable reinforcing fixture 3 to temporarily reinforce the weak points of the notch 21. Specifically, after the notch 21 is formed at a preset bending position of the profile 2, and before a decorative texture layer is formed on the surface of the profile 2, the preparation method further includes: placing a detachable reinforcing fixture 3 in the inner cavity 111 of the profile 2, extending across the notch 21.

[0090] The reinforcing fixture 3 has a cross-sectional shape that matches the inner cavity 111 of the profile 2. For example, it can be cut from a T-shaped aluminum profile 2 with a length of approximately 100mm to 300mm. It can be obliquely inserted and locked into the inner cavities 111 on both sides of the notch 21. After installation, the reinforcing fixture 3 spans both sides of the notch 21, with its two ends supported in the inner cavities of the profile 2 on both sides of the notch 21, forming a bridging reinforcement for the weak area and effectively compensating for the local stiffness loss caused by the formation of the notch 21. It can be understood that the reinforcing fixture 3 has the function of preventing deformation of the profile 2 and ensuring normal painting of the cross-section of the notch 21 without affecting the surface treatment quality.

[0091] Before bending the surface-treated profile 2, the preparation method of the frame 1 also includes disassembling the reinforcing fixture 3. Since the reinforcing fixture 3 is only physically locked in the inner cavity 111 and is not fixedly connected to the profile 2, it can be directly pulled out or knocked out, making disassembly convenient and reusable. After disassembly, the profile 2 returns to the state of the notch 21 and can be bent and formed normally.

[0092] By setting up the aforementioned detachable reinforcing fixture 3, this application solves the problem of deformation of the profile 2 in the process without affecting the quality of the surface treatment 115, and provides a guarantee for subsequent efficient spraying, transfer printing and bending.

[0093] In some embodiments, forming a decorative texture layer on the surface of the profile includes: forming a base film layer on the surface of the profile; and forming an ink layer on the base film layer.

[0094] For example, a base film layer is formed on the surface of the profile. The preparation method of the frame 1 includes: coating the profile with a polyester composition and curing the polyester composition to form a base film layer; an ink layer is formed on the base film layer. The preparation method of the frame 1 includes: performing heat transfer printing on the base film layer to form an ink layer.

[0095] The polyester-type composition was prepared according to the proportions in the aforementioned examples.

[0096] Specifically, the formation of the base film layer and the decorative texture layer correspond to the two steps of spraying and heat transfer, respectively.

[0097] Specifically, the base film layer is formed through coating. After cleaning and drying, the profile embedded in the T-shaped reinforcing fixture is suspended on a spraying fixture, and a polyester-based coating is evenly applied to the surface of the profile using electrostatic spraying to form a coating layer. The coating thickness is controlled between 40μm and 80μm, which balances coverage and flexibility: too thin a film can lead to uneven coverage and the base color showing through after transfer; too thick a film increases the internal stress of the coating during bending, increasing the risk of cracking.

[0098] After spraying, the profile enters the baking line. The curing temperature of the polyester composition is 180℃~200℃, and the time is 10~15 minutes, allowing the coating to melt, flow, cross-link, and cure, forming a firmly adhered base film layer. This temperature and time range must be strictly controlled: if the temperature is too low or the time is insufficient, curing will be incomplete, resulting in poor mechanical properties of the coating; if the temperature is too high or the time is too long, the cross-linking density of the coating will be too high, increasing brittleness and making it prone to cracking when bent. The base film layer obtained through this step has sufficient hardness to support the transferred pattern while maintaining appropriate flexibility, matching the deformation capacity of the iron-based alloy (elongation ≥22%).

[0099] Subsequently, the profile undergoes vacuum heat transfer printing to form an ink layer. The sprayed and cured profile is evenly wrapped with heat transfer paper, ensuring tight contact between the paper and the profile surface, paying particular attention to gaps and corner areas. The wrapped profile is then placed in a vacuum bag, and a vacuum is created to ensure the transfer paper adheres completely to the profile surface under negative pressure, eliminating air bubbles and wrinkles. It is then placed in a heat transfer oven at 160℃~180℃ for 5~10 minutes. Under these conditions, the ink on the transfer paper sublimates into a gaseous state, penetrating into the base film layer and adhering to it, forming the desired decorative patterns such as wood grain and marble texture.

[0100] The temperature and time parameters are set based on the following: if the temperature is below 160℃ or the time is less than 5 minutes, the ink sublimation is insufficient, resulting in a light, blurry pattern, or even areas where the ink has not been transferred; if the temperature is above 180℃ or the time exceeds 10 minutes, the ink diffuses excessively, causing the pattern boundaries to become blurred and distorted, and potentially damaging the performance of the base film layer. Within the optimal parameter range, the ink penetration depth is moderate, the pattern is clear and sharp, and it bonds firmly to the base film layer.

[0101] It is important to note that because the profile is still straight at this stage, with a smooth and unobstructed surface, the heat transfer paper can adhere evenly to the entire profile surface, including the corner areas where it will bend later, without any dead corners. This is fundamentally different from the traditional process of bending first and then transferring, which results in missed or missing prints at corners due to the transfer paper's inability to adhere properly. Furthermore, since a base film layer has already been applied to the notched section in the previous spraying process, wrapping the transfer paper at this stage does not affect adhesion. After bending, the section closes, and there is no exposed metal on the exterior surface 115.

[0102] After cooling, the vacuum bag and release paper are removed, yielding a semi-finished profile with a complete decorative texture. The continuous and complete surface pattern of this semi-finished product provides a foundation for subsequent bending and forming.

[0103] It is worth noting that the exterior surface 115 of the middle frame 11 refers to the surface that is exposed to the outside and can be viewed when it is installed in the display device; the non-exterior surface 116 refers to the surface of the middle frame 11 that is located inside the display device and is covered and not viewed when in use.

[0104] Based on this distinction, this application employs different treatment methods for the two types of surfaces in its design and manufacturing process: the appearance surface 115 must meet the requirement of continuous, complete, and defect-free decorative texture, therefore it requires special protection during surface treatment and bending to avoid any damage or obstruction. The non-appearance surface 116 is mainly used for structural fixing and connection, such as welding and snap-fitting, and allows for localized paint film defects or processing marks. For example, the welding position on the inner surface at the bending corner in this application is located on the non-appearance surface 116. Even if the high temperature of welding ablates the local decorative texture layer, it will not affect the final visual effect; at the same time, the reinforcing fixture does not contact the appearance surface 115 when embedded in the inner cavity 111, ensuring that the painting and transfer quality of the appearance surface 115 is not affected. This design balances appearance quality and structural reliability.

[0105] For some specific implementation methods, please refer to Figure 8 , Figure 8 This is a second flowchart illustrating a method for preparing a border 1 according to an embodiment of this application. The method for preparing the border 1 specifically includes the following steps.

[0106] Step S101: Slitting the roll material.

[0107] Iron-based alloy coils with an elongation at break of ≥22% are slit into sheets of the required width. This step provides standardized blanks for subsequent roll forming. Compared to aluminum extrusions, iron-based alloy coils have lower material costs and are easier to produce continuously and automatically.

[0108] S102, roll forming.

[0109] The slit sheet metal is continuously cold-bent using a roll forming machine to obtain long strip profiles with specific cross-sectional shapes (such as U-shaped, C-shaped, or T-shaped). The advantages of roll forming are: firstly, it can maintain the characteristics of uniform material thickness and uniform deformation during bending; secondly, it has high production efficiency and is suitable for mass production; and thirdly, the cross-section of the profile can be flexibly designed according to requirements to meet different strength and assembly requirements.

[0110] S103, cut to a fixed length.

[0111] The continuously rolled profile is cut to a preset length to obtain a single long strip of semi-finished profile.

[0112] S104, stamped positioning holes and V-shaped notches.

[0113] Notches are set at the preset bending positions of the profile, and positioning holes are punched as needed. The purpose of the notches is to remove excess material on the inside of the bend, preventing material accumulation that could cause wrinkles at the corners; and to control the forming angle after bending by controlling the angle of the notches. After the V-shaped notch is punched, the first inclined surface 1121 and the second inclined surface 1131 are naturally formed on both sides, preparing for the fitting structure during subsequent bending. The positioning holes are used for positioning or error prevention in subsequent processes.

[0114] S105, reinforcement with V-shaped notch fixture.

[0115] This is a crucial auxiliary step. Because the profile's strength is weakened locally after the V-shaped notch is punched, it is prone to twisting and deformation during subsequent handling and surface treatment. To solve this problem, a reinforcing jig (approximately 100mm~300mm in length) is obliquely inserted into the profile's inner cavity 111, extending across the V-shaped notch, to temporarily reinforce the weak point. The ingenious design of this reinforcing jig is that it is only embedded in the inner cavity 111, without affecting the painting and transfer effect on the outer surface 115; it does not obstruct the V-shaped notch cross-section, ensuring the proper application of the decorative texture layer; and it is easy to disassemble and reusable.

[0116] S106, Painting.

[0117] The reinforced profile is cleaned and dried, then suspended on a spraying fixture for electrostatic powder coating (polyester-based composition). The polyester-based composition is prepared according to the aforementioned proportions. The coating thickness is controlled at 40μm~80μm, and cured by baking at 180℃~200℃ for 10~15 minutes to form a base film layer. This coating needs to have good flexibility to accommodate subsequent bending deformation. Since the reinforcing fixture is only located in the inner cavity 111, the outer surface 115 is sprayed evenly and completely, and a decorative texture layer is also normally applied to the V-shaped notch section.

[0118] S107, Heat transfer printing.

[0119] Evenly wrap the sprayed profile with heat transfer paper, place it in a vacuum bag, and vacuum-seal to ensure the transfer paper adheres tightly to the profile surface, especially ensuring proper adhesion at the V-shaped notch and future corner areas. Place it in a heat transfer oven and heat at 160℃~180℃ for 5~10 minutes to allow the ink to sublimate and penetrate into the base film layer, forming a decorative texture. After cooling, remove the vacuum bag and release paper to obtain a semi-finished profile with a complete texture. The key to this step is that because the profile remains straight with a flat, unobstructed surface, the heat transfer paper can adhere evenly, completely avoiding the problems of missed printing and texture loss at corners caused by poor adhesion in traditional bending-before-transfer processes.

[0120] S108, right-angle integral bending and welding.

[0121] The reinforcing fixture of the inner cavity 111 of the profile is disassembled, and the profile with decorative texture is placed on a bending machine and bent at 90° using the V-shaped notch as a positioning reference. During the bending process, the V-shaped notch gradually closes, and the first inclined surface 1121 and the second inclined surface 1131 fit together to form a corner structure. Because the iron-based alloy substrate has a fracture elongation of ≥22% and the base film layer has been optimized for flexibility, neither the substrate nor the coating at the stretched area on the outside of the corner cracks. After bending, laser welding is performed on the inner surface (non-exterior surface 116) at the inclined surface fit to fix the first frame 112 and the second frame 113, further enhancing the structural stability of the corner. The welding position is located on the inner cavity 111, not the exterior surface 116, and does not affect the appearance.

[0122] S109, Border 1 check.

[0123] The obtained frame 1 is inspected for appearance and dimensions, and is put into storage after passing the inspection.

[0124] This application adopts a process path of surface treatment followed by bending: a decorative texture layer is formed on the surface of the straight profile before bending, which avoids the problem of poor heat transfer adhesion at the corners; at the same time, by selecting a high elongation iron-based alloy and a flexible decorative texture layer, the problem of cracking of the substrate and film layer during bending is solved.

[0125] This application also provides a display device, which can be a television, a commercial display, an educational device, etc.

[0126] The display device includes the frame 1 in the above embodiments, or the display device includes the frame 1 prepared by the above-described method for preparing the frame 1. Specifically, the frame 1 serves as the front frame or decorative frame of the display device, surrounding the display panel. Because the decorative texture layer on its outer surface is continuously distributed at right-angle bends without any missing prints or cracks, when the display device is viewed from the front, the texture at the corners of the frame 1 appears natural and continuous, without the discontinuities or gaps that are difficult to avoid in traditional splicing schemes, presenting an integrated picture frame visual effect.

[0127] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0128] In the description of this application, 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, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0129] The foregoing has provided a detailed description of the border, the method for preparing the border, and the display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A bezel, characterized in that, include: The middle frame has an inner cavity and includes a first frame and a second frame that are connected to each other. A bend and corner are formed at the connection between the first frame and the second frame. A decorative texture layer is disposed on the surface of the middle frame, and the decorative texture layer is continuously distributed at the bends and corners.

2. The frame according to claim 1, characterized in that, The decorative texture layer includes a base film layer and an ink layer, with the base film layer covering the middle frame and the ink layer disposed on the base film layer.

3. The frame according to claim 2, characterized in that, The base film layer is formed by curing a polyester-type composition, which includes a polyester resin and a curing agent, wherein the mass ratio of the polyester resin to the curing agent is 90:10 to 95:

5.

4. The frame according to claim 3, characterized in that, The polyester composition further includes titanium dioxide, leveling agent, brightening agent, benzoin, wax powder, plasticizer, and catalyst. The polyester composition, by weight, comprises: polyester resin and curing agent: 65-75 parts; titanium dioxide: 25-30 parts; leveling agent: 0.05-0.2 parts; brightening agent: 0.05-0.2 parts; benzoin: 0.05-0.2 parts; wax powder: 0.05-0.2 parts; plasticizer: 0.5-0.8 parts; and catalyst: 0.3-0.5 parts.

5. The frame according to claim 3, characterized in that, The curing agent is triglycidyl isocyanurate or hydroxyalkylamide.

6. The frame according to any one of claims 1 to 5, characterized in that, The first frame includes a first bottom surface and a first side surface, the first bottom surface and the first side surface are connected. The second frame includes a second bottom surface and a second side surface, the second bottom surface and the second side surface are connected. The first bottom surface and the second bottom surface are connected. The end of the first side surface near the bend corner is a first inclined surface, and the end of the second side surface near the bend corner is a second inclined surface. The first inclined surface and the second inclined surface fit together.

7. The frame according to claim 6, characterized in that, The first frame and the second frame are fixed by welding at the joint of the first inclined surface and the second inclined surface, through the side of the first side and the second side near the inner cavity.

8. The frame according to any one of claims 1 to 5, characterized in that, The elongation at break of the middle frame is greater than or equal to 22%.

9. The frame according to claim 8, characterized in that, The material of the middle frame is an iron-based alloy.

10. The frame according to claim 9, characterized in that, The iron-based alloy is one of SUS430, SUS304, SECC, SGCC or SPCC.

11. A method for preparing a border, characterized in that, The method for preparing the border according to any one of claims 1 to 10 includes: A profile is provided, the profile being made of an iron-based alloy, and the profile having an internal cavity; A decorative texture layer is formed on the surface of the profile; The profile having the decorative texture layer is bent to form a frame with bent corners.

12. The method for preparing the frame according to claim 11, characterized in that, Before forming a decorative texture layer on the surface of the profile, the method further includes: forming a notch at a predetermined bending position of the profile along a direction perpendicular to the length of the profile, wherein the notch has a first inclined surface and a second inclined surface on both sides; Bending the profile with the decorative texture layer to form a frame with a bend corner includes: bending the profile with the decorative texture layer so that the first inclined surface and the second inclined surface fit together to form a middle frame with a bend corner.

13. The method for preparing the frame according to claim 11, characterized in that, A decorative texture layer is formed on the surface of the profile, and the method for preparing the border includes: forming a base film layer on the surface of the profile; and forming an ink layer on the base film layer.

14. A display device, characterized in that, Includes the border as described in any one of claims 1 to 10, or the border prepared by the method for preparing the border as described in any one of claims 11 to 13.

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