Anti-static dust-removing structure of PF thin film touch screen
Patent Information
- Application Number
- CN202522048310.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-24
AI Technical Summary
[0002]PF 薄膜因耐候性强（-40~150℃稳定工作）、透光率高（≥90%）及柔韧性好，被广泛用于各类触控屏表层，PF 薄膜表面电阻高（≥10¹²Ω），易因摩擦（如手指触摸、空气流动）产生静电（电压可达 1000V 以上），大量吸附环境中粉尘（粒径≥0.5μm），3-5 天即出现明显灰尘堆积，影响触控灵敏度（误触率提升 15%）与显示清晰度，高电压静电易击穿触控屏内部 ITO 导电层（击穿电压≤500V），导致局部触控失效（故障率≥8%/ 年），尤其在干燥环境（湿度≤30%）中风险更高，传统清洁需人工用无尘布擦拭，频繁擦拭易划伤 PF 薄膜表面（划痕率≥20%），且缝隙（如屏体与边框连接处）灰尘难以清除，长期堆积会加速元件老化，为此设计一种PF薄膜触控屏的防静电除尘结构
[0008]与现有技术相比，本实用新型具有以下优点：本防静电除尘结构的具有结构简单，每个边单独设置微型风扇，相互运行互不干扰，除尘效果明显，结构的表层喷涂特殊的透明可视的导电涂层，减少对于可视率的影响，同时提高可操作性能，宜推广使用。
Smart Images
Figure CN224823848U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of touch screen protection technology, and in particular to an anti-static dust removal structure for PF film touch screens. Background Technology
[0002] PF film is widely used in the surface layer of various touch screens due to its strong weather resistance (stable operation from -40 to 150℃), high light transmittance (≥90%), and good flexibility. However, PF film has high surface resistance (≥10¹²Ω), making it prone to static electricity (voltage can reach over 1000V) due to friction (such as finger touch or airflow). This causes it to attract a large amount of dust (particle size ≥0.5μm) from the environment, resulting in significant dust accumulation within 3-5 days. This affects touch sensitivity (increasing the false touch rate by 15%) and display clarity. High-voltage static electricity can easily break down the internal ITO conductive layer of the touch screen (breakdown voltage ≤500V), leading to localized touch failure (failure rate ≥8% / year). The risk is even higher in dry environments (humidity ≤30%). Traditional cleaning requires manual wiping with a lint-free cloth, and frequent wiping can easily scratch the PF film. Dust on the surface of the thin film (scratch rate ≥20%) and in the gaps (such as the connection between the screen and the frame) is difficult to remove. Long-term accumulation will accelerate the aging of components. Therefore, an anti-static dust removal structure for PF thin film touch screen is designed. Utility Model Content
[0003] The purpose of this utility model is to provide an anti-static dust removal structure for PF thin film touch screens to solve the above-mentioned technical problems. To achieve the above purpose, this utility model adopts the following technical solution: An antistatic dust removal structure for a PF thin film touch screen includes a touch screen structure, a dust removal frame structure, and an encapsulation frame. The encapsulation frame is encapsulated and fixed to the side edge of the touch screen structure, and the dust removal frame structure is fixed to the outer side of the encapsulation frame.
[0004] Based on the above technical solution, the touch screen structure consists of an anti-static spray coating layer, a side conductor of the spray coating layer, a conductor grounding wire, a PF film layer, and a display touch screen. The PF film layer is fixed on the display touch screen, the anti-static spray coating layer is sprayed and covered on the surface of the PF film layer, the side conductor of the spray coating layer is fixed on the side of the PF film layer, and the conductor grounding wire is connected to the side conductor of the spray coating layer. The encapsulation frame is surrounded and fixed on the side edges of the anti-static spray coating layer, the PF film layer, and the display touch screen by a groove-type encapsulation plate. The dust removal frame structure is fixed on the outside of the groove-type encapsulation plate, and the plane height of the dust removal frame structure is higher than the plane of the anti-static spray coating layer, the PF film layer, and the display touch screen.
[0005] Based on the above technical solution, the dust removal frame structure consists of an air duct frame, a micro fan, and a fan inlet filter plate. The air duct frame is set with the edge of the PF film layer. Multiple sets of micro fans are set on the bottom side of each side of the air duct frame, and the top of the micro fan is connected to the air duct frame. The fan inlet filter plate is attached to the side of the micro fan.
[0006] Based on the above technical solution, the micro fan consists of a fan and a fan duct. The fan is fixed inside the fan duct. The fan inlet filter plate consists of a filter screen and a magnetic ring. The magnetic ring is fixed to the outer edge of one side of the filter screen and is magnetically attached to the side of the fan duct. A flow channel is provided inside the duct frame. A fan guide duct is provided on the bottom side of the duct frame. The fan duct is fixed at the bottom end of the fan guide duct. The flow channel is L-shaped. An air distribution plate is arranged at the inner opening end of the flow channel. The direction of the air distribution plate and the direction of the opening end of the flow channel are nearly parallel to the touch screen structure.
[0007] Based on the above technical solution, the antistatic coating is applied using a nano-tin oxide transparent conductive coating with a thickness of 50-80 nm and a sheet resistance ≤10 Ω·cm. 8 Ω, the side conductor of the spray coating and the conductor grounding wire are both made of metallic copper, and the conductor grounding wire is treated with outer insulation. The micro fan adopts a flat-designed ducted centrifugal fan.
[0008] Compared with the prior art, the present invention has the following advantages: The antistatic dust removal structure has a simple structure, each side is equipped with a micro fan that operates independently without interfering with each other, and the dust removal effect is obvious. The surface of the structure is sprayed with a special transparent and visible conductive coating, which reduces the impact on visibility and improves operability, making it suitable for widespread use. Attached Figure Description
[0009] Figure 1 This is a general appearance diagram of the present utility model.
[0010] Figure 2 This is a schematic diagram showing the disassembled structure of this utility model.
[0011] Figure 3 This is a schematic diagram showing the disassembled structure of the touch screen of this utility model.
[0012] Figure 4 This is a schematic diagram of the dust removal frame structure of this utility model.
[0013] Figure 5 This is a schematic diagram of the miniature fan of this utility model.
[0014] Figure 6 This is a cross-sectional view of the air duct frame of this utility model.
[0015] In the diagram: 1. Touchscreen structure; 2. Dust removal frame structure; 3. Encapsulation frame; 4. Antistatic spray coating; 5. Spray coating side conductor; 6. Conductor grounding wire; 7. PF film layer; 8. Display touchscreen; 9. Groove-type encapsulation board; 10. Air duct frame; 11. Miniature fan; 12. Fan inlet filter plate; 13. Fan duct; 14. Filter screen; 15. Magnetic ring; 16. Airflow duct; 17. Fan airflow duct; 18. Air distribution plate; 19. Detailed Implementation
[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0017] An antistatic dust removal structure for a PF thin film touch screen includes a touch screen structure 1, a dust removal frame structure 2, and an encapsulation frame 3. The encapsulation frame 3 is encapsulated and fixed to the side edge of the touch screen structure 1, and the dust removal frame structure 2 is fixed to the outer side of the encapsulation frame 3.
[0018] The above are the three main components of the structure and their corresponding positional relationships, with corresponding appendices. Figure 1 and attached Figure 2 .
[0019] The touchscreen structure 1 consists of an anti-static spray coating layer 4, a spray coating side conductor 5, a conductor grounding wire 6, a PF film layer 7, and a display touchscreen 8. The PF film layer 7 is fixed on the display touchscreen 8. The anti-static spray coating layer 4 is sprayed and covered on the surface of the PF film layer 7. The spray coating side conductor 5 is fixed on the side of the PF film layer 7. The conductor grounding wire 6 is connected to the spray coating side conductor 5. The encapsulation frame 3 is surrounded and fixed on the side edges of the anti-static spray coating layer 4, the PF film layer 7, and the display touchscreen 8 by a groove-type encapsulation plate 9. The dust removal frame structure 2 is fixed on the outside of the groove-type encapsulation plate 9, and the plane height of the dust removal frame structure 2 is higher than the plane of the anti-static spray coating layer 4, the PF film layer 7, and the display touchscreen 8.
[0020] The above describes the composition and corresponding positional relationships of touchscreen structure 1, with corresponding appendices. Figure 3 .
[0021] The dust removal frame structure 2 consists of an air duct frame 10, a micro fan 11, and a fan inlet filter plate 12. The air duct frame 10 is set at the edge of the PF film layer 7. Multiple sets of micro fans 11 are provided, and the multiple sets of micro fans 11 are respectively set on the bottom side of each side of the air duct frame 10. The top of the micro fan 11 is connected to the air duct frame 10. The fan inlet filter plate 12 is attached to the side of the micro fan 11.
[0022] The above describes the main exterior components of the dust collector frame structure 2, and the corresponding appendix... Figure 4 .
[0023] The miniature fan 11 consists of a fan 13 and a fan duct 14. The fan 13 is fixed inside the fan duct 14. The fan inlet filter plate 12 consists of a filter screen 15 and a magnetic ring 16. The magnetic ring 16 is fixed to the outer edge of one side of the filter screen 15 and is attached to the side of the fan duct 14. A flow channel 17 is provided inside the duct frame 10. A fan guide duct 18 is provided on the bottom side of the duct frame 10. The fan duct 14 is fixed to the bottom end of the fan guide duct 18. The flow channel 17 is L-shaped. An air distribution plate 19 is arranged at the inner opening end of the flow channel 17. The direction of the air distribution plate 19 and the direction of the opening end of the flow channel 17 are nearly parallel to the touch screen structure 1.
[0024] The above describes the structural composition of the micro fan 11 and the air duct frame 10, with corresponding appendices. Figure 5 and attached Figure 6 .
[0025] In terms of material selection, the antistatic spray coating 4 is a nano-tin oxide transparent conductive coating with a thickness of 50-80nm and a sheet resistance ≤10. 8 Ω, the side conductor 5 of the spray coating and the conductor grounding wire 6 are both made of metallic copper material, and the conductor grounding wire 6 is treated with outer insulation. The micro fan 11 adopts a flat-designed ducted centrifugal fan.
[0026] In practical applications, when the touchscreen is activated, the micro fan 11 turns on simultaneously, drawing in external air through the fan duct 14 and the fan intake filter plate 12. The filter screen 15 effectively intercepts large-diameter dust particles, preventing dust from entering the air duct system. The magnetic ring 16 facilitates quick disassembly and cleaning of the filter screen, ensuring filtration efficiency over long-term use. The drawn-in air enters the airflow duct 17 through the fan guide duct 18. The L-shaped airflow duct 17, in conjunction with the air distribution plate 19, ensures even airflow distribution, forming a stable airflow layer parallel to the touchscreen surface. This airflow layer not only effectively disperses electrostatically adsorbed dust adhering to the PF film layer surface but also creates a positive pressure environment on the touchscreen surface, preventing external dust from redepositing. Because the plane height of the dust removal frame structure is higher than that of the touchscreen structure, the airflow will not directly impact the display area during the cleaning process, avoiding any impact on the accuracy of touch operation. Meanwhile, the anti-static spray coating 4 conducts the static electricity generated by friction to the ground in real time through a conductor grounding wire, so that the voltage on the touch screen surface is stabilized within a safe range (≤500V), fundamentally eliminating the phenomenon of static adsorption.
[0027] The above description is a preferred embodiment of the present utility model. For those skilled in the art, any changes, modifications, substitutions and variations made to the implementation methods without departing from the principles and spirit of the present utility model, based on the teachings of the present utility model, still fall within the protection scope of the present utility model.
Claims
1. An antistatic dust removal structure for a PF thin-film touch screen, characterized in that, The device includes a touch screen structure (1), a dust removal frame structure (2), and an encapsulation frame (3). The encapsulation frame (3) is fixed to the side edge of the touch screen structure (1), and the dust removal frame structure (2) is fixed to the outer side of the encapsulation frame (3). The touch screen structure (1) consists of an anti-static spray coating layer (4), a spray coating side conductor (5), a conductor grounding wire (6), a PF film layer (7), and a display touch screen (8). The PF film layer (7) is fixed on the display touch screen (8), the anti-static spray coating layer (4) is sprayed and covered on the surface of the PF film layer (7), the spray coating side conductor (5) is fixed to the side of the PF film layer (7), and the conductor grounding wire (6) is connected to the spray coating side conductor (5). The encapsulation frame (3) is surrounded and fixed by a grooved encapsulation plate (9) on the anti-static spray coating layer. On the side edges of the electrostatic spray coating (4), PF film layer (7), and display touch screen (8), the dust removal frame structure (2) is fixed on the outside of the groove-type encapsulation plate (9), and the plane height of the dust removal frame structure (2) is higher than the plane of the antistatic spray coating (4), PF film layer (7), and display touch screen (8). The dust removal frame structure (2) is composed of air duct frame (10), micro fan (11), and fan inlet filter plate (12). The air duct frame (10) is set with the edge of the PF film layer (7). There are multiple sets of micro fans (11). Multiple sets of micro fans (11) are respectively set on the bottom side of each side of the air duct frame (10), and the top of the micro fan (11) is connected to the air duct frame (10). The fan inlet filter plate (12) is attached to the side of the micro fan (11).
2. The antistatic dust removal structure for a PF thin-film touch screen according to claim 1, characterized in that, The miniature fan (11) consists of a fan (13) and a fan duct (14). The fan (13) is fixed inside the fan duct (14). The fan inlet filter plate (12) consists of a filter screen (15) and a magnetic ring (16). The magnetic ring (16) is fixed to the outer edge of one side of the filter screen (15) and is attached to the side of the fan duct (14). The fan duct frame (10) is set inside the fan duct frame (10). There is a flow duct (17), and a fan guide duct (18) is provided on the bottom side of the duct frame (10). The fan duct (14) is fixed at the bottom end of the fan guide duct (18). The flow duct (17) is arranged in an L-shape. The inner side opening end of the flow duct (17) is provided with an arranged air distribution plate (19). The direction of the air distribution plate (19) and the direction of the opening end of the flow duct (17) are nearly parallel to the touch screen structure (1).
3. The antistatic dust removal structure for a PF thin-film touch screen according to claim 2, characterized in that, The antistatic coating layer (4) is a nano-tin oxide transparent conductive coating with a thickness of 50-80 nm and a sheet resistance ≤10 Ω·cm. 8 Ω, the side conductor (5) of the spray coating and the conductor grounding wire (6) are both made of copper metal, and the conductor grounding wire (6) is treated with outer insulation. The micro fan (11) adopts a flat-designed ducted centrifugal fan.