A nano-injection molded back plate and backlight module
By forming a nanopore array on the surface of a metal substrate and creating a mechanical interlocking structure with the plastic sidewalls, the problems of heavy weight and high cost of traditional pure metal backplates are solved, enabling efficient and low-cost mass production and improving the connection strength and stability of the backplate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIZHOU BAOMING SEIKO CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional pure metal backplates are heavy and expensive, and the one-piece die-casting process is complex and costly, making it difficult to achieve efficient and low-cost large-scale production.
By employing nano-injection molding technology, a nanopore array is formed on the surface of a metal substrate and mechanically interlocked with the plastic sidewalls. Combined with stamping and other processes, this reduces mold costs and enables efficient mass production.
It reduces material and mold costs, improves connection strength and stability, and ensures the overall structural stability and durability of the backplate, making it suitable for mass production.
Smart Images
Figure CN224303990U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of backlight module technology, specifically to a nano-injection molded backplate and backlight module. Background Technology
[0002] In the field of modern display technology, liquid crystal displays (LCDs) are widely used in various display devices such as televisions, computer monitors, and mobile phone screens due to their advantages such as low power consumption, no radiation, and high image quality. As one of the key components of LCDs, the backlight module provides a uniform backlight source for the LCD panel. The backlight module usually uses a backplate to protect the internal optical components, provide support for components such as reflective sheets, light guide plates, and diffusion films, and prevent external dust, moisture, and mechanical impact from damaging the backlight module.
[0003] Traditional backplates use pure metal to ensure rigidity and heat dissipation. However, pure metal backplates are heavy, increasing the overall weight of the product and affecting the user experience. Furthermore, the metal materials used are relatively expensive, leading to high material costs. In terms of manufacturing processes, to form the special structures such as the retaining walls around the backplate, a one-piece die-casting process must be used. While one-piece die-casting can ensure the integrity and structural strength of the backplate to a certain extent, the design and manufacturing requirements of the die-casting molds are extremely high. This results in high development costs and a long development cycle. Designing a die-casting mold that meets precision standards requires specialized technicians to perform precise calculations and repeated adjustments. The combined labor and time costs significantly increase the overall cost. Utility Model Content
[0004] The purpose of this invention is to provide a nano-injection molded backplate and backlight module that can improve connection strength, ensure connection stability, and reduce costs.
[0005] A nano-injection molded backplate includes: a metal substrate with an array of nanopores on its surface; and plastic sidewalls covering the periphery of the metal substrate, wherein the plastic sidewalls have permeable portions extending toward the surface of the metal substrate, the permeable portions filling and anchoring within the nanopores to form a mechanically interlocking structure.
[0006] In the above solution, the structure of metal substrate and plastic sidewalls is lighter than that of pure metal backplate, which also reduces material costs. The metal substrate can be formed by stamping, cutting and other processes, requiring low mold costs and featuring high efficiency and speed, enabling large-scale and mass production. The process of forming a nanopore array by immersing the metal substrate in chemicals can also process a large number of metal substrates in a short time, and the operation is relatively simple. The barrier wall is formed around the metal substrate by injection molding. Compared with the traditional one-piece die casting process, the mold cost required for production is lower. The nanopore array on the surface of the metal substrate and the permeable part of the plastic sidewalls are perfectly matched to form a stable mechanical interlocking structure, which can ensure high connection strength between the plastic sidewalls and the metal substrate, and will not separate even after long-term use, greatly improving the overall stability of the backplate.
[0007] Furthermore, the nanopores penetrate the surface of the metal substrate to form a three-dimensional interconnected structure.
[0008] In the above scheme, the three-dimensional interconnected structure formed by the nanopores is like a precise interlocking network, which allows the permeable parts extending from the plastic sidewalls to the surface of the metal substrate to be embedded in it in all directions and at a deep level. This structure greatly increases the contact area between the plastic and the metal, and significantly enhances the stability and durability of the overall backplate structure.
[0009] Furthermore, the metal substrate has a planar structure.
[0010] In the above scheme, the design and manufacturing of planar molds are relatively simple. The mold structure does not need to consider too many complex curved surfaces and angles, and the processing accuracy requirements of the mold are relatively low. This significantly reduces the manufacturing cost of molds for metal substrate processing, while also extending the service life of the molds, further reducing production costs and greatly improving production efficiency.
[0011] Furthermore, the junction between the metal substrate and the plastic sidewall is planar.
[0012] In the above scheme, the planar joint significantly reduces the difficulty of mold design and manufacturing. Whether it is a metal substrate molding mold or a plastic sidewall injection mold, the planar feature eliminates the need for complex curved surfaces or special shape designs in the mold structure. During the mold manufacturing process, planar machining makes it easier to ensure accuracy and effectively reduces manufacturing time and costs.
[0013] Furthermore, the junction between the metal substrate and the plastic sidewall is provided with at least one groove, and the plastic sidewall is provided with a protruding structure, which is embedded in the groove.
[0014] In the above scheme, the combination of grooves and protrusions increases the contact area between the metal substrate and the plastic sidewalls, thereby increasing the permeable portion and nanopores, which can further improve the connection strength between the metal substrate and the plastic sidewalls and ensure the stability of the overall backplate structure.
[0015] Furthermore, the metal substrate is provided with a bending portion, and the plastic sidewall is combined with the bending portion.
[0016] In the above solution, the combination of the plastic sidewall and the bent part on the metal substrate can ensure a more stable bond between the plastic sidewall and the metal substrate.
[0017] Furthermore, the junction between the metal substrate and the plastic sidewall is provided with a serrated structure.
[0018] In the above scheme, the serrated structure forms a mechanical interlock, which greatly improves the peel and shear resistance between the metal substrate and the plastic sidewall. When they are combined, they mesh like gears, providing a more reliable mechanical connection. The serrated structure also increases the bonding points of nanopores and permeable parts, thereby increasing or decreasing the bonding strength and ensuring the stability of the bonding.
[0019] Furthermore, the serrated structure includes alternating peaks and valleys.
[0020] In the above scheme, the alternating arrangement of peaks and valleys forms a complex and stable mechanical interlocking structure. When the plastic sidewalls are combined with the metal substrate, the plastic material fills the valleys and interlocks tightly with the peaks, which is similar to assembling... Figure 1 This gives both a strong resistance to separation in all directions.
[0021] A backlight module includes a backplate nano-injection molded as described in any of the above embodiments.
[0022] In the above scheme, the backplate formed by nano-injection molding has good stability. The structural stability of the backplate helps to ensure the accurate relative position of each optical component in the backlight module, thereby improving the uniformity of light.
[0023] This invention discloses a nano-injection molded backplate and backlight module, which has the advantages of improving connection strength, ensuring connection stability, and reducing costs. Compared to a pure metal backplate, the structure of the metal substrate and plastic sidewalls is lighter, reducing material costs. The metal substrate can be formed using stamping, cutting, and other processes, requiring lower mold costs and offering high efficiency and speed, enabling large-scale, mass production. The process of forming a nanopore array by immersing the metal substrate in chemicals can process large quantities of metal substrates in a short time, and the operation is relatively simple. Injection molding forms a retaining wall around the metal substrate, which, compared to traditional one-piece die-casting, requires lower mold costs. The nanopore array on the surface of the metal substrate and the permeable portion of the plastic sidewalls perfectly match, forming a stable mechanical interlocking structure that ensures high connection strength between the plastic sidewalls and the metal substrate, preventing separation even after long-term use, and greatly improving the overall stability of the backplate. Attached Figure Description
[0024] Figure 1 A nano-injection molded backplate structure as an example
[0025] Figure 2 This is a simplified schematic diagram of the combination of the metal substrate and the plastic sidewall in Example 1.
[0026] Figure 3 This is a simplified schematic diagram of the combination of the metal substrate and the plastic sidewall in Example 2.
[0027] Figure 4 This is a three-dimensional view of the nano-injection molded backplate in Example 3.
[0028] Figure 5 This is a simplified schematic diagram of the combination of the metal substrate and the plastic sidewall in Example 3.
[0029] Figure 6 This is a schematic diagram of the sawtooth structure of the metal substrate in Example 4.
[0030] Explanation of the reference numerals: 1. Metal substrate; 2. Plastic sidewall; 3. Groove; 4. Raised structure; 5. Bending section; 6. Serrated structure; 61. Valley. Detailed Implementation
[0031] The following will describe in further detail a nano-injection molded backplate and backlight module of the present invention with reference to specific embodiments and accompanying drawings. Example 1
[0032] like Figure 1As shown in a preferred embodiment, a nano-injection molded backplate of the present invention includes: a metal substrate 1, the surface of which is provided with an array of nanopores; and plastic sidewalls 2, which cover the four edges of the metal substrate 1. The plastic sidewalls 2 have permeable portions extending toward the surface of the metal substrate 1, and the permeable portions fill and anchor within the nanopores to form a mechanical interlocking structure.
[0033] Compared to a pure metal backplate, the structure of metal substrate 1 and plastic sidewall 2 is lighter and can reduce material costs. Metal substrate 1 can be formed by stamping, cutting and other processes, which requires low mold costs and has the characteristics of high efficiency and speed, enabling large-scale and mass production. The process of forming a nanopore array by soaking metal substrate 1 in chemicals can also process a large number of metal substrates 1 in a short time and the operation is relatively simple. The barrier wall is formed around the metal substrate 1 by injection molding, which requires lower mold costs compared to the traditional one-piece die casting process.
[0034] In addition, the nanopore array on the surface of the metal substrate 1 and the permeable part of the plastic sidewall 2 are perfectly matched to form a stable mechanical interlocking structure, which can ensure that the connection strength between the plastic sidewall 2 and the metal substrate 1 is high and will not separate even after long-term use. Moreover, it has good sealing performance, preventing water seepage at the connection point between the metal substrate 1 and the plastic sidewall 2, which greatly improves the overall stability and lifespan of the back panel. The diameter of the nanopores is generally between 50 and 500 nanometers, which belongs to the microstructure. The attached diagram will not show them in detail.
[0035] In this embodiment, the formation of nanopores occurs through a specific chemical reaction between a chemical solution and the surface of the metal substrate 1. This reaction selectively dissolves certain components on the metal surface, resulting in a large number of nanoscale micropores on the surface of the metal substrate 1. These micropores possess high specific surface area and surface energy, providing a physical basis for subsequent plastic permeation and mechanical interlocking. For example, for the metal substrate 1 made of aluminum alloy, a strong acid solution can be used, typically a mixture of strong acids such as sulfuric acid, hydrochloric acid, and nitric acid. Some metal salts may also be added as catalysts to promote nanopore formation.
[0036] In some embodiments, nanopores penetrate the surface of the metal substrate 1 to form a three-dimensional interconnected structure. The three-dimensional interconnected structure formed by the nanopores is like a precise interlocking network, allowing the permeable portions of the plastic sidewalls 2 extending into the surface of the metal substrate 1 to be embedded in it from all directions and at a deep level. This structure greatly increases the contact area between the plastic and the metal, significantly enhancing the stability and durability of the overall backplate structure.
[0037] like Figure 1As shown, in some embodiments, the metal substrate 1 has a planar structure. The design and manufacture of molds with planar structures are relatively simple. The structure of the mold does not need to consider too many complex curved surfaces and angles, and the processing accuracy requirements of the mold are also relatively low. This significantly reduces the manufacturing cost of the mold processed from the metal substrate 1, while also extending the service life of the mold, further reducing production costs and greatly improving production efficiency.
[0038] like Figure 2 As shown, in some embodiments, the joint between the metal substrate 1 and the plastic sidewall 2 is planar. The planar joint significantly reduces the difficulty of mold design and manufacturing. Whether it's the molding mold for the metal substrate 1 or the injection mold for the plastic sidewall 2, the planar feature eliminates the need for complex curved surfaces or special shapes in the mold structure. During mold manufacturing, planar machining makes it easier to ensure accuracy, effectively reducing manufacturing time and costs. Example 2
[0039] like Figure 1 and Figure 3 As shown, the structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that at least one groove 3 is provided at the joint between the metal substrate 1 and the plastic sidewall 2, and a protrusion structure 4 is provided on the plastic sidewall 2, which is embedded in the groove 3. The cooperation between the groove 3 and the protrusion structure 4 increases the contact area between the metal substrate 1 and the plastic sidewall 2, thereby increasing the permeable portion and nanopores, which can further improve the connection strength between the metal substrate 1 and the plastic sidewall 2 and ensure the stability of the overall structure of the backplate. Example 3
[0040] like Figure 4 and Figure 5 As shown, the structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that the metal substrate 1 is provided with a bending portion 5, and the plastic sidewall 2 is combined with the bending portion 5. This combination can ensure a more stable bond between the plastic sidewall 2 and the metal substrate 1. Example 4
[0041] like Figure 6 As shown, the structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference is that the joint between the metal substrate 1 and the plastic sidewall 2 is provided with a serrated structure 6. The serrated structure 6 forms a mechanical interlock, which greatly improves the peel resistance and shear resistance between the metal substrate 1 and the plastic sidewall 2. When they are joined together, they are like gears meshing, providing a more reliable mechanical connection. The serrated structure 6 also increases the number of joint points between the nanopores and the permeable parts, thereby increasing or decreasing the bonding strength and ensuring the stability of the bonding.
[0042] like Figure 6As shown, in this embodiment, the sawtooth structure 6 includes alternating peaks and valleys 61. The alternating arrangement of peaks and valleys 61 constitutes a complex and stable mechanical interlocking structure. When the plastic sidewall 2 is bonded to the metal substrate 1, the plastic material fills the valleys 61 and tightly interlocks with the peaks, which is similar to piecing together... Figure 1 This gives both a strong resistance to separation in all directions.
[0043] It should be noted that in actual production, the structures of Examples 1, 2, 3 and 4 can be freely combined and applied.
[0044] A backlight module includes a nano-injection molded backplate as described in any of the above embodiments. The nano-injection molded backplate exhibits good stability, and its structural stability helps ensure the accurate relative positioning of each optical component in the backlight module, thereby improving light uniformity.
[0045] This invention relates to the working principle and process of a nano-injection molded backplate and backlight module. The process involves processing a metal sheet using stamping and cutting techniques to create a metal substrate 1 of the required shape and size. The molded metal substrate 1 is then immersed in a prepared chemical solution. During immersion, the solution reacts chemically with the metal surface, forming nanopores. The metal substrate 1 is then removed from the solution and thoroughly rinsed with clean water to remove residual chemicals and impurities. It is then dried to prepare for the next injection molding step. The nanopore-treated metal substrate 1 is then installed into an injection mold. The mold design ensures accurate positioning of the metal substrate 1 during injection molding, guaranteeing that the plastic sidewalls 2 can cover its perimeter as designed. During injection molding, the plastic sidewalls 2 are filled and anchored within the nanopores, forming a mechanical interlocking structure that achieves a strong bond between the plastic sidewalls 2 and the metal substrate 1.
[0046] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 utility model 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 utility model.
[0047] 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0049] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.
Claims
1. A nano-injection molded backplate, characterized in that, include: A metal substrate (1) has a nanopore array on its surface; Plastic sidewalls (2) are wrapped around the periphery of the metal substrate (1). The plastic sidewalls (2) have permeable portions extending toward the surface of the metal substrate (1). The permeable portions fill and anchor within the nanopores to form a mechanically interlocked structure.
2. The nano-injection molded backplate according to claim 1, characterized in that, The nanopores penetrate the surface of the metal substrate (1) to form a three-dimensional interconnected structure.
3. The backplate formed by nano-injection molding according to claim 1, characterized in that, The metal substrate (1) has a planar structure.
4. The backplate formed by nano-injection molding according to claim 1, characterized in that, The junction between the metal substrate (1) and the plastic sidewall (2) is planar.
5. The nano-injection molded backplate according to claim 1, characterized in that, The metal substrate (1) and the plastic sidewall (2) are provided with at least one groove (3), and the plastic sidewall (2) is provided with a protrusion structure (4), which is embedded in the groove (3).
6. The nano-injection molded backplate according to claim 1, characterized in that, The metal substrate (1) is provided with a bending portion (5), and the plastic sidewall (2) is combined with the bending portion (5).
7. The nano-injection molded backplate according to claim 1, characterized in that, The junction between the metal substrate (1) and the plastic sidewall (2) is provided with a serrated structure (6).
8. The nano-injection molded backplate according to claim 7, characterized in that, The serrated structure (6) includes alternating peaks and valleys (61).
9. A backlight module, characterized in that, Including the nano-injection molded backplate as described in any one of claims 1 to 8 above.