Flexible block type anti-collision LED display screen

Abstract

The invention relates to the technical field of display equipment, in particular to a flexible block type anti-collision LED display screen. The LED display screen comprises a display main body and an anti-collision protection pattern layer, the display main body is formed by detachably fixing a plurality of flexible LED display modules with data interfaces through fasteners and electrically connecting the flexible LED display modules with the data interfaces through data connecting lines, the anti-collision protection pattern layer is formed by compounding polycarbonate and polyimide materials, and the outer surface of the anti-collision protection pattern layer is provided with a nano scratch-resistant coating. And the anti-collision protection pattern layer covers the outer surface of the display main body. The substrate of the flexible LED display module is a flexible polyimide substrate, and the corresponding thickness of each layer is set. The display main bodies can be flexibly combined, the requirements for different sizes of the display screen are met, high impact resistance is achieved, and the service life of the display screen is prolonged.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a flexible, segmented, impact-resistant LED display screen. Background Technology

[0002] LED displays are widely used in stadiums, outdoor advertising, stage performances, and other scenarios due to their advantages such as high brightness, vibrant colors, and long lifespan. In stadiums and similar settings, LED displays often need to play match videos and event information; however, existing LED displays have the following shortcomings: 1. Poor size flexibility: Traditional LED displays are mostly fixed structures, which cannot be flexibly adjusted according to the space size and playback requirements of the usage scenario. When different sizes of display screens are required, different specifications of display screens need to be replaced, which is costly and cumbersome. 2. Weak impact resistance: In sports venues and other settings, balls such as basketballs, footballs, and golf balls are prone to impacting the surface of the display screen. The surface of existing LED display screens is mostly made of ordinary glass or plastic, which has poor impact resistance. After an impact, the screen is prone to breakage and damage to the display module, which affects normal use and increases maintenance costs.

[0003] Therefore, there is an urgent need for an LED display screen that can be flexibly combined in size and has impact resistance to meet the usage needs of special scenarios such as stadiums. Summary of the Invention

[0004] The purpose of this application is to overcome the above-mentioned technical problems and provide a flexible, segmented, impact-resistant LED display screen that can flexibly combine the display body to meet the needs of different display screen sizes, and has strong impact resistance, thus extending the service life of the display screen.

[0005] This application discloses a flexible, segmented, impact-resistant LED display screen, which adopts the following solution: A flexible, segmented, impact-resistant LED display screen includes: a display body and an impact-resistant protective layer. The display body includes several flexible LED display modules and a combined connection structure. Each flexible LED display module is provided with a data interface. The combined connection structure includes a fastener and a data connection cable. The fastener is disposed on the edge of each flexible LED display module. Adjacent flexible LED display modules are detachably fixed by the fastener and electrically connected to the data interface through both ends of the data connection cable. The impact-resistant protective layer covers the outer surface of the display body and is made of a composite material of polycarbonate and polyimide. A nano-scratch-resistant coating is provided on the outer surface of the impact-resistant protective layer away from the display body.

[0006] By adopting the above technical solution, the problems of traditional LED displays being difficult to assemble flexibly and lacking sufficient impact and scratch resistance are solved. Several flexible LED display modules are detachably fixed by snap-fit ​​components, facilitating flexible assembly and disassembly, and simplifying transportation, installation, and maintenance. Data connection cables electrically connect to the data interface to achieve data transmission and ensure display functionality. The impact-resistant protective layer is made of a composite material of polycarbonate and polyimide, effectively resisting impacts and protecting the display body; the nano-scratch-resistant coating prevents scratches on the surface of the impact-resistant protective layer, extending the lifespan of the display screen.

[0007] Optionally, the impact-resistant protective layer includes: a polycarbonate layer located on the outer layer of the display body, made of polycarbonate material; and a polyimide layer located between the polycarbonate layer and the display body, which is co-extruded onto the display body with the polycarbonate layer, the polyimide layer being made of polyimide material; wherein the nano-scratch-resistant coating is located on the outer surface of the polycarbonate layer away from the polyimide layer.

[0008] By adopting the above technical solution, the polycarbonate layer is located on the outer layer of the display body. Polycarbonate material has characteristics such as high impact resistance, high transparency, and good dimensional stability, which can effectively protect the display body from damage such as impact and scratch, while ensuring that the display screen has a good visual effect. The polyimide layer is located between the polycarbonate layer and the display body. It is made of polyimide material and is compounded with the polycarbonate layer on the display body through a co-extrusion molding process. Polyimide material has excellent heat resistance, chemical stability, and mechanical properties, which can enhance the adhesion and stability of the entire impact-resistant protective layer to the display body, further improving the impact resistance of the display screen. The nano anti-scratch coating is located on the outer surface of the polycarbonate layer away from the polyimide layer. The nano anti-scratch coating has excellent hardness and wear resistance, which can prevent the surface of the impact-resistant protective layer from being scratched and extend the service life of the display screen.

[0009] Optionally, the substrate of the flexible LED display module is a flexible polyimide substrate with a thickness of 0.1-0.3 mm.

[0010] By adopting the above technical solution, the substrate of the flexible LED display module is made of flexible polyimide substrate, which gives the display screen good flexibility and can adapt to different bending installation requirements; the substrate thickness is set to 0.1-0.3mm, which reduces the weight of the display screen and lowers the cost while ensuring a certain strength, and also helps to improve the overall flexibility of the display screen.

[0011] Optionally, the thickness of the impact-resistant protective layer is 0.5-1.2 mm.

[0012] By adopting the above technical solution, the thickness of the impact-resistant protective layer is set at 0.5-1.2mm, which can ensure that the display screen has good impact resistance (the impact resistance of the protective layer is ≥60kJ / m², which can withstand the impact of balls with a diameter ≤20cm and a speed ≤10m / s, and there are no obvious cracks or deformations after the impact, and it does not affect the normal video playback function of the display body), while avoiding the overall thickness of the display screen being too large due to the impact-resistant protective layer being too thick, which would affect its flexibility and ease of use.

[0013] Optionally, the thickness of the polycarbonate layer is 0.35-0.96 mm; the thickness of the polyimide layer is 0.15-0.24 mm.

[0014] By adopting the above technical solution, setting the thickness of the polycarbonate layer to 0.35-0.96mm can ensure a certain strength and impact resistance of the impact-resistant protective layer while avoiding excessive thickness that would reduce flexibility (increase the bending radius) and increase cost and weight. Setting the thickness of the polyimide layer to 0.15-0.24mm allows the polyimide layer to exhibit good flexibility and fit with the display body, while also being reasonably combined with the polycarbonate layer to form an impact-resistant protective layer with suitable performance.

[0015] Optionally, the thickness of the polycarbonate layer is 0.64 mm; the thickness of the polyimide layer is 0.16 mm.

[0016] By adopting the above technical solution, setting the thickness of the polycarbonate layer to 0.64mm can ensure a certain strength and impact resistance while taking into account the overall thickness and cost of the display screen; setting the thickness of the polyimide layer to 0.16mm allows the polyimide layer to better exert its characteristics, such as enhancing the flexibility and fit of the impact-resistant protective layer after being combined with the polycarbonate layer, and better matching the bending characteristics of the flexible LED display module.

[0017] Optionally, the impact-resistant protective layer is bonded to the display body with optically transparent adhesive.

[0018] By adopting the above technical solution, using optically transparent adhesive to bond the impact-resistant protective layer to the display body, a firm connection between the impact-resistant protective layer and the display body can be achieved, ensuring that the impact-resistant protective layer stably covers the outer surface of the display body to play an impact-resistant role; at the same time, the optically transparent adhesive is transparent and will not affect the display effect of the screen, ensuring that the screen displays the picture normally and clearly.

[0019] Optionally, the thickness of the nano-scratch-resistant coating is 50-100nm, and the light transmittance is ≥98%.

[0020] By adopting the above technical solution, the thickness of the nano-scratch-resistant coating is set to 50-100nm, and the light transmittance is ≥98%. This effectively enhances the scratch resistance of the outer surface of the impact-resistant protective layer without affecting the overall performance of the display screen, protecting the display screen from scratch damage and extending the service life of the display screen.

[0021] Optionally, each of the flexible LED display modules is provided with LED beads and a driving circuit, wherein the driving circuit is electrically connected to the LED beads and the data interface.

[0022] By adopting the above technical solution, the flexible LED display module is equipped with LED beads and a driving circuit electrically connected to the LED beads and the data interface, which can realize the driving control of the LED beads and enable the flexible LED display module to display normally.

[0023] Optionally, the nano-scratch-resistant coating is a nano-silica or alumina coating.

[0024] By adopting the above technical solution, the nano-scratch-resistant coating is set as a nano-silica or aluminum oxide coating, which can prevent the outer layer of the impact-resistant protective layer from being exposed to the outside world, and prevent scratches caused by wiping, dust friction, and slight scratches from affecting the display clarity.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. Several flexible LED display modules are detachably fixed with snap-fit ​​fasteners, facilitating flexible assembly and disassembly, and simplifying transportation, installation, and maintenance. Data connection cables electrically connect to the data interface to achieve data transmission and ensure display functionality. The impact-resistant protective layer is made of a composite of polycarbonate and polyimide materials, effectively resisting impacts and protecting the display body. A nano-scratch-resistant coating prevents scratches on the surface of the impact-resistant protective layer, extending the lifespan of the display screen.

[0026] 2. The polycarbonate layer is located on the outer layer of the display body. Polycarbonate material has high impact resistance, high transparency, and good dimensional stability, which can effectively protect the display body from damage such as impact and scratches, while ensuring that the display screen has a good visual effect. The polyimide layer is located between the polycarbonate layer and the display body. It is made of polyimide material and is compounded to the display body with the polycarbonate layer through a co-extrusion molding process. Polyimide material has excellent heat resistance, chemical stability, and mechanical properties, which can enhance the adhesion and stability of the entire impact-resistant protective layer to the display body, further improving the impact resistance of the display screen. The nano anti-scratch coating is located on the outer surface of the polycarbonate layer away from the polyimide layer. The nano anti-scratch coating has excellent hardness and wear resistance, which can prevent the surface of the impact-resistant protective layer from being scratched and extend the service life of the display screen.

[0027] 3. Setting the thickness of the polycarbonate layer to 0.64mm can ensure a certain level of strength and impact resistance while taking into account the overall thickness and cost of the display screen; setting the thickness of the polyimide layer to 0.16mm allows the polyimide layer to better exert its properties, such as enhancing the flexibility and fit of the impact-resistant protective layer after being combined with the polycarbonate layer, and better matching the bending characteristics of the flexible LED display module. Attached Figure Description

[0028] Figure 1 This is a schematic diagram illustrating a scenario application of a flexible, segmented, impact-resistant LED display screen disclosed in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a flexible, segmented, impact-resistant LED display screen disclosed in an embodiment of this application; Figure 3 This is intended to illustrate a comparison of the material properties of impact-resistant protective layers. Figure 4 This is a representation of the transmittance and refractive index parameters for each layer. Figure 5 This is a schematic diagram of the impact energy absorption and transfer process. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0031] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a” and “the” as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] It should be understood that although the terms "first," "second," etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. 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, "multiple" means two or more, unless otherwise explicitly specified.

[0033] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0034] See Figure 1 and Figure 2 This application discloses a flexible segmented impact-resistant LED display screen, including: a display body and an impact-resistant protective layer. The impact-resistant protective layer covers the outer surface of the display body, which protects the display body and prevents it from being damaged by impact. At the same time, the outer surface of the impact-resistant protective layer is covered with a nano anti-scratch coating, which can prevent the surface from being scratched and ensure the display effect of the screen.

[0035] The main display unit consists of several flexible LED display modules and a combined connection structure. This structure allows the display screen to be flexibly combined in size according to actual needs, meeting the usage requirements of different scenarios. Each flexible LED display module includes a substrate, LED beads, and a driving circuit. The substrate is made of flexible polyimide, a material with good flexibility and a thickness of 0.1-0.3mm, which can be bent at ±90°, facilitating the splicing and installation of flexible LED display modules on non-planar surfaces such as curved walls and cylindrical surfaces. LED beads are the key components for displaying images; they emit light of different colors and brightness to form the display screen. The driving circuit is electrically connected to the LED beads and the data interface, and its function is to control the light emission state of the LED beads based on the received data signals. The driving circuit can be an integrated circuit board, integrating various electronic components to achieve precise control of the LED beads. Of course, a driving circuit built with discrete components can also be used, depending on actual needs; this embodiment is not limited to this.

[0036] The combined connection structure includes snap-fit ​​components and data connection cables. The snap-fit ​​components are located at the edge of each flexible LED display module and can be made of ABS engineering plastic, possessing a certain degree of elasticity for easy installation and disassembly. Adjacent flexible LED display modules are detachably fixed using the snap-fit ​​components. This connection method ensures a secure connection between modules while facilitating replacement and adjustment. In this embodiment, the structure of the snap-fit ​​components is as follows: Figure 1The structure shown at the top of each flexible LED display module is not limited to the specific structure of the fasteners; as long as the relevant connections can be achieved, it is acceptable.

[0037] Each flexible LED display module is equipped with a data interface. The two ends of a data connection cable are connected to the data interfaces of adjacent flexible LED display modules to enable video signal transmission between modules. The data connection cable can be a flat ribbon cable, which offers good flexibility and signal transmission performance, or it can be a round cable. This embodiment is not limited to any particular type; a suitable connection cable can be selected based on the actual situation.

[0038] See Figure 2 An impact-resistant protective layer covers the outer surface of the display body, comprising a polycarbonate (PC) layer and a polyimide (PI) layer. The polycarbonate layer, located on the outermost layer of the display body, is made of polycarbonate material. This material possesses excellent impact resistance, transparency, and stability over a wide temperature range, simultaneously meeting the three major requirements of "resisting ball impacts," "not affecting video display," and "adapting to outdoor / sports stadium temperature differences," making it the core material for the outer impact-resistant layer. The polyimide layer, located between the polycarbonate layer and the display body, is co-extruded onto the display body using a "co-extrusion molding process." The polyimide layer, made of polyimide material, possesses "high strength + high flexibility," compensating for the shortcomings of polycarbonate in tear resistance and flexibility. It also matches the material characteristics of the flexible polyimide substrate of the flexible LED display module, ensuring that the entire protective layer can deform with the bending of the module, preventing delamination or breakage. The total thickness of the impact-resistant protective layer is set to 0.5-1.2mm, corresponding to an impact strength of ≥60kJ / m², capable of withstanding impacts from balls with a diameter ≤20cm and a speed ≤10m / s, without significant cracks or deformation after impact, and without affecting the normal video playback function of the display subject. Regarding the "co-extrusion molding process," in this embodiment, PC and PI materials are fused under high temperature (280℃-320℃) and high pressure (10-15MPa) conditions to form an integrated composite structure without a clear interface. The bonding strength between the two layers is ≥15N / cm, far exceeding the 5N / cm of the adhesive process, and delamination will not occur when bending.

[0039] Specifically, excessive thickness of the impact-resistant protective layer reduces flexibility (increases the bending radius), while insufficient thickness affects impact resistance. Therefore, in this embodiment, the thickness is controlled between 0.5-1.2 mm, corresponding to 0.35-0.96 mm for the PC layer and 0.15-0.24 mm for the PI layer. Through finite element analysis simulation, a total thickness of 0.8 mm for the impact-resistant protective layer, corresponding to 0.64 mm for the PC layer and 0.16 mm for the PI layer, was determined to be the optimal value. At this thickness, the bending radius can be as low as 5 cm, while the impact resistance reaches 75 kJ / m. 2 It combines flexibility and impact resistance.

[0040] See Figure 3 and Figure 4 The characteristics of the polycarbonate (PC) layer are as follows: Impact resistance: Notched impact strength ≥60kJ / m² (at 23℃), far exceeding that of ordinary glass (impact strength ≈10kJ / m²) and acrylic (impact strength ≈15kJ / m²). It can directly withstand the impact of balls (such as basketballs and footballs) with a diameter ≤20cm and a speed ≤10m / s. When impacted, the material absorbs energy through slight deformation, avoiding stress concentration that could lead to breakage. Light transmittance: Light transmittance ≥90%, close to that of ordinary glass (light transmittance ≈92%), and there is no obvious dispersion of light when it passes through, which will not cause color distortion or brightness reduction of the LED display screen; Weather resistance: The material properties do not change significantly within a temperature range of -40℃ to 120℃ (heat distortion temperature ≥130℃), and it can adapt to the complex environment of sports venues in summer high temperature and winter low temperature, or outdoor sun and rain, avoiding embrittlement and cracking due to temperature changes. Processability: It can be tightly bonded to the inner PI material through co-extrusion, hot pressing and other processes to form an integrated composite structure. After molding, it can be precisely cut according to the size of the LED display module to adapt to different specifications of segmented modules. The properties of the polyimide (PI) layer are as follows: Tear resistance and high strength: Tensile strength ≥200MPa, elongation at break ≥40%, which is 2-3 times that of polycarbonate. When the outer PC layer is subjected to impact and develops micro-cracks, the inner PI layer can prevent the cracks from spreading due to its own high strength, thus avoiding overall damage to the protective layer. At the same time, the tear resistance of the PI layer is ≥50kN / m, which can withstand the tensile force that may occur after impact (such as the rebound of a ball after impact, causing the object to scrape). Flexible adaptability: The bending radius can be as low as 5mm (performance degradation ≤5% after repeated bending 1000 times), which is perfectly matched with the bending characteristics of flexible LED display modules. When the display screen is installed on curved walls or cylindrical surfaces, the protective layer can bend synchronously with the module without wrinkles or delamination. High Temperature Resistance and Insulation: The long-term operating temperature range is -269℃ to 400℃. It can withstand the localized high temperatures generated during LED display module operation (driver chip temperature is typically ≤80℃), and has excellent insulation performance (volume resistivity ≥10). 16 (Ω・cm), which can further protect the internal circuitry of the module from external interference. Furthermore, to prevent the outer layer of the impact-resistant protective layer from being exposed to the outside environment for a long time, which could easily cause scratches due to wiping, dust friction, or slight scratches, thus affecting display clarity, in this embodiment, a high-hardness anti-scratch coating with a thickness of 50-100nm is added to the outer surface of the PC layer. This can effectively prevent the display surface from being scratched, ensure display clarity, and improve the durability of the display.

[0041] In this embodiment, a precision coating process is used to fabricate the nano-scratch-resistant coating. The nano-scratch-resistant coating can be a silica nano-coating (SiO2) or an aluminum oxide (Al2O3) coating. See [link to documentation]. Figure 3 and Figure 4 The nano-scratch-resistant coating has the following features: High hardness: The coating has a hardness of 9H (pencil hardness test standard), which is far greater than the 2H hardness of the polycarbonate (PC) layer itself. It can resist the scratches of everyday metal products (such as keys and tools) and avoid obvious scratches.

[0042] High light transmittance: The thickness of the nano-scratch-resistant coating is only 50-100nm, and the light transmittance is ≥98%, which will not affect the light transmittance of the PC layer, ensuring the brightness and color reproduction of the LED display screen; Hydrophobicity and easy cleaning: The water contact angle is ≥110° (belonging to the superhydrophobic range). When rainwater and stains (such as beverages and dust) fall on the coating surface, they will form water droplets and slide off on their own, eliminating the need for frequent wiping and reducing maintenance costs. At the same time, the coating surface is smooth, and dust does not easily adhere to it. Cleaning only requires rinsing with water. The implementation principle of this embodiment is based on four core logics: energy absorption, crack prevention, flexible adaptation, and interference-free display. Through structural layering, material composites, and process optimization, a balance is achieved between impact resistance and other performance characteristics. 1. Impact-resistant design principle: "Energy stratification absorption + stress dispersion" See Figure 5 When objects such as balls collide with the display screen, the impact-resistant protective layer achieves efficient absorption and dispersion of impact energy through the synergistic effect of the three-layer structure, preventing energy from being transferred to the internal LED display module. Step 1: A nano-scratch-resistant layer provides initial cushioning; Step 2: Initial energy absorption by the outer PC layer: At the moment of impact, the PC layer undergoes a slight elastic deformation (deformation amplitude ≤ 0.5mm) due to its high toughness, converting the impact kinetic energy into the elastic potential energy of the material, thus initially weakening the impact force; due to the excellent impact resistance of the PC layer, it can quickly return to its original shape after deformation and will not undergo permanent deformation. Step 3: Inner PI layer blocks stress diffusion: If the impact force is large, causing micro-cracks in the PC layer, the high strength and tear resistance of the PI layer will prevent the cracks from spreading further (the crack length is usually ≤0.1mm), thus preventing the cracks from extending to the surface of the display module; at the same time, the flexibility of the PI layer will disperse the locally concentrated stress to a larger area, reducing the stress intensity per unit area. Step 4: Composite Structure for Collaborative Buffering: The PC layer and PI layer are co-extruded to form a tightly bonded composite structure. The difference in elastic modulus between the two layers (PC elastic modulus ≈ 2.3 GPa, PI elastic modulus ≈ 3.5 GPa) creates a "soft-hard" transition zone, further buffering impact energy and preventing damage to the display module from rigid impacts. Tests show that this composite structure can achieve an impact energy absorption efficiency of over 85%, with the remaining energy transferred to the LED beads being less than 15% of the total impact energy, far below the damage threshold of the LED beads (the maximum impact force that LED beads can withstand is ≈ 5N, while the composite structure can reduce an impact force of 20N to ≤ 7N). 2. Flexible Adaptive Design Principle: "Material Property Matching + Structural Integration" To ensure that the impact-resistant protective layer can bend synchronously with the flexible LED display module, the design focused on solving the problem of "the layer not breaking or delaminating during bending": Material property matching: PI, which has the same flexibility as the LED module substrate (PI material), was selected as the inner layer material. This ensures that the impact-resistant protective layer is highly matched with the module's bending modulus, elongation at break, and other parameters. When bent, the deformation amplitude of the two is consistent, avoiding delamination caused by internal stress due to deformation differences. Composite process optimization: The "co-extrusion molding process" is adopted to replace the traditional bonding process. PC and PI materials are fused under high temperature (280℃-320℃) and high pressure (10-15MPa) conditions to form an integrated composite structure without obvious interface. The bonding strength of the two layers is ≥15N / cm, which is much higher than the 5N / cm of the bonding process. Delamination will not occur when bending. Precise thickness control: The total thickness of the protective layer is controlled between 0.5-1.2mm (0.35-0.96mm for the PC layer and 0.15-0.24mm for the PI layer). Excessive thickness will reduce flexibility (increase the bending radius), while insufficient thickness will affect impact resistance. Through finite element analysis simulation, a total thickness of 0.8mm (0.64mm for the PC layer and 0.16mm for the PI layer) was determined to be the optimal value. At this value, the bending radius can be as low as 5cm, while the impact resistance reaches 75kJ / m², balancing flexibility and impact resistance. 3. Display-free design principle: "Optimized light transmittance + refractive index matching" The protective layer covers the surface of the display module and must ensure that it does not affect the clarity and color reproduction of the video image. This is achieved in the design using the following methods: Figure 4As shown: Light transmittance optimization: PC layer transmittance ≥90%, PI layer transmittance ≥92%, nano anti-scratch coating transmittance ≥98%, and the total transmittance after the three-layer structure is stacked is ≥88% (transmittance calculation formula: Ttotal = TPC × TPI × Tcoating), which is far higher than the industry's minimum standard of 80%, ensuring that the brightness decay of LED beads is ≤12%; Refractive index matching: PC layer refractive index ≈ 1.58, PI layer refractive index ≈ 1.65, optically clear adhesive (OCA, used to bond the impact-resistant protective layer and display module) refractive index ≈ 1.56. By selecting materials with similar refractive indices, the reflection loss of light at the interface of each layer is reduced (reflectivity ≤ 2%), avoiding problems such as screen whitening and glare; at the same time, the light transmittance of OCA adhesive is ≥ 98%, further reducing light loss; Surface smoothness control: A nano-scratch-resistant coating is made using a precision coating process, with a surface roughness of ≤0.01μm (mirror-level smoothness), avoiding light scattering caused by uneven surfaces and ensuring clear image display without blurring or ghosting.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flexible, segmented, impact-resistant LED display screen, characterized in that, include: The display body includes a main body and an impact-resistant protective layer. The main body includes several flexible LED display modules and a combined connection structure. Each flexible LED display module is provided with a data interface. The combined connection structure includes a fastener and a data connection line. The fastener is provided on the edge of each flexible LED display module. Adjacent flexible LED display modules are detachably fixed by the fastener and electrically connected to the data interface through the two ends of the data connection line. The impact-resistant protective layer covers the outer surface of the display body and is made of a composite material of polycarbonate and polyimide. A nano-scratch-resistant coating is provided on the outer surface of the impact-resistant protective layer away from the display body.

2. The flexible segmented impact-resistant LED display screen according to claim 1, characterized in that, The impact-resistant protective layer includes: A polycarbonate layer, located on the outer layer of the display body, is made of polycarbonate material; A polyimide layer is located between the polycarbonate layer and the display body, and is co-extruded onto the display body with the polycarbonate layer. The polyimide layer is made of polyimide material. The nano-scratch-resistant coating is located on the outer surface of the polycarbonate layer away from the polyimide layer.

3. The flexible segmented impact-resistant LED display screen according to claim 1, characterized in that, The substrate of the flexible LED display module is a flexible polyimide substrate with a thickness of 0.1-0.3 mm.

4. The flexible segmented impact-resistant LED display screen according to claim 1, characterized in that, The thickness of the impact-resistant protective layer is 0.5-1.2 mm.

5. The flexible segmented impact-resistant LED display screen according to claim 4, characterized in that, The thickness of the polycarbonate layer is 0.35-0.96 mm; the thickness of the polyimide layer is 0.15-0.24 mm.

6. The flexible segmented impact-resistant LED display screen according to claim 5, characterized in that, The polycarbonate layer has a thickness of 0.64 mm; the polyimide layer has a thickness of 0.16 mm.

7. The flexible segmented impact-resistant LED display screen according to claim 1, characterized in that, The impact-resistant protective layer is bonded to the display body with optically transparent adhesive.

8. The flexible segmented impact-resistant LED display screen according to claim 1, characterized in that, The thickness of the nano-scratch-resistant coating is 50-100nm, and the light transmittance is ≥98%.

9. The flexible segmented impact-resistant LED display screen according to claim 1, characterized in that, Each of the flexible LED display modules is provided with LED beads and a driving circuit, and the driving circuit is electrically connected to the LED beads and the data interface.

10. The flexible segmented impact-resistant LED display screen according to claim 1, characterized in that, The nano-scratch-resistant coating is a nano-silica or alumina coating.

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