An adhesive system for mini-led display screen film
By physically roughening the edges of the MiniLED display film to form a micron-nano scale rough structure and introducing polar functional groups, the problem of insufficient adhesion is solved, achieving a highly efficient and environmentally friendly bonding effect and improving the film bonding yield.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI MTC VISUAL DISPLAY CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-12
AI Technical Summary
Existing MiniLED display films suffer from edge lifting, corner lifting, and delamination due to insufficient adhesion during bonding, affecting the display effect. Furthermore, existing solutions such as chemical corrosion and mechanical polishing pose environmental burdens and material damage problems.
A membrane roughening device is used to physically roughen the edge surface of the membrane using high-pressure gas or plasma to form a micron-nano scale rough structure, which increases the adhesion force and introduces polar functional groups to improve the adhesion. Precise bonding is then achieved using a gripping device and an adhesive device.
It improved the adhesion between the film and the substrate, reduced the environmental burden and material damage rate, and increased the film yield from 85% to 99.50%.
Smart Images
Figure CN224348435U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of MiniLED display manufacturing technology, and in particular to an adhesive system for MiniLED display film. Background Technology
[0002] LED electronic displays integrate microelectronics technology, computer technology, and information processing, and have advantages such as bright colors, wide dynamic range, high brightness, long lifespan, and stable and reliable operation.
[0003] When an LED display screen is completed, a protective film needs to be applied to its surface to ensure color consistency and meet protection requirements. Existing films suffer from edge curling, corner curling, and delamination due to insufficient adhesion at the film edges. This curling and delamination results in inconsistent color edges around the LED display screen, affecting its display performance. Current solutions address these issues by using chemical etching or mechanical polishing to create a micron / nanoscale uneven structure on the film surface, increasing the specific surface area and thus solving the problem of insufficient adhesion. However, these solutions have the following drawbacks: (1) Chemical etching easily increases the environmental burden and environmental costs for enterprises. (2) Mechanical polishing easily causes irreversible physical damage to the film and equipment, leading to material damage. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides an adhesive system for MiniLED display film, which can improve the adhesion between the film and the substrate, and has a low environmental impact and low material damage rate.
[0005] To address the aforementioned issues, this invention proposes an adhesive system for MiniLED display film, comprising a film roughening device, a gripping device, and a film adhesive device.
[0006] The diaphragm roughening device includes a roughening nozzle and a travel track. The travel track is arranged along the edge of the diaphragm. The roughening nozzle and the travel track are slidably connected. The roughening nozzle is connected to a compressed gas device or a plasma gas device.
[0007] The grasping device is used to grasp the roughened diaphragm and convey it to the diaphragm bonding device, which is used to bond the roughened diaphragm to the LED display screen. As an improvement to the above technical solution, when the roughening nozzle is connected to the compressed gas device, the gas pressure ejected by the roughening nozzle is 0.4-0.7 MPa, and the pressure formed on the diaphragm by the high-pressure gas ejected by the roughening nozzle is 40-60 Pa.
[0008] As an improvement to the above technical solution, the gas compressed by the gas compression device is oxygen or helium.
[0009] As an improvement to the above technical solution, when the roughening nozzle is connected to the plasma gas device, the roughening nozzle can eject an atmospheric pressure plasma jet.
[0010] The working gas of the plasma gas device is argon, nitrogen, or a helium-oxygen mixture.
[0011] As an improvement to the above technical solution, the sliding speed of the roughening nozzle on the travel track is 150-240 mm / s.
[0012] As an improvement to the above technical solution, the spraying time of the roughening nozzle is 100-130s.
[0013] As an improvement to the above technical solution, the roughness Ra of the membrane after being processed by the membrane roughening device is ≥0.5μm.
[0014] As an improvement to the above technical solution, the grasping device includes an adsorption head and a negative pressure pump, the negative pressure pump and the adsorption head are connected, and the adsorption head is used to adsorb the membrane.
[0015] As an improvement to the above technical solution, the diaphragm bonding device is a roller pressing device or an adhesive bonding device.
[0016] As an improvement to the above technical solution, a diaphragm fixing device is also included, which is used to fix the diaphragm, and the diaphragm roughening device is located above the diaphragm fixing device.
[0017] The following are the beneficial effects of implementing this utility model:
[0018] This invention relates to an adhesive system for MiniLED display films, comprising a film roughening device, a gripping device, and a film adhesive device. The film fixing device includes a roughening nozzle and a travel track, the travel track being arranged along the edge of the film, and the roughening nozzle and the travel track being slidably connected. Compared to existing technologies, the roughening nozzle is connected to a compressed gas device or a plasma gas device. It sprays high-pressure gas onto the surface of the film edge to form a uniform micron-nano scale rough structure; or it uses plasma gas to bombard the surface of the film edge, introducing polar functional groups and increasing physical roughness. The above methods for increasing the physical roughness of the film surface do not have a negative impact on the environment and do not damage the material. This improves the adhesion between the film and the display screen while reducing the cost of the adhesive process, increasing the film yield from 85% to 99.50% after roughening. Attached Figure Description
[0019] Figure 1This is a schematic diagram of the composition of an adhesive system according to an embodiment of the present invention;
[0020] Figure 2 This is a schematic diagram of the structure of a diaphragm roughening device according to an embodiment of the present invention;
[0021] Figure 3 This is a schematic diagram of the composition of a grasping device according to an embodiment of the present invention. Detailed Implementation
[0022] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.
[0023] In existing technologies, diaphragm roughening is generally achieved through chemical etching or mechanical polishing. However, these methods have negative environmental impacts, increase environmental costs for companies, and make materials prone to damage.
[0024] Therefore, see Figure 1 As shown, this utility model provides an adhesive system for MiniLED display film, including a film roughening device 1, a gripping device 2, and a film adhesive device 3.
[0025] This invention modifies the roughening process of the membrane by physically roughening the surface of the membrane or by introducing polar functional groups.
[0026] For details, see Figure 2 As shown, the diaphragm roughening device 1 includes a roughening nozzle 12 and a travel track 11. The travel track 11 is arranged along the edge of the diaphragm 4. The roughening nozzle 12 and the travel track 11 are slidably connected. The roughening nozzle 12 is connected to a compressed gas device 13 or a plasma gas device 14.
[0027] The grasping device 2 is used to grasp the roughened film 4 and transport the film 4 to the film bonding device 3, which is used to bond the roughened film 4 to the LED display screen.
[0028] The working principle of this utility model:
[0029] A diaphragm roughening device 1 is positioned above the diaphragm 4. The travel track 11 of the diaphragm roughening device 1 is arranged along the edge of the diaphragm 4. A roughening nozzle 12 is slidably connected to the travel track 11 and is connected to a compressed gas device 13 or a plasma gas device 14. The roughening nozzle 12 slides along the edge of the diaphragm 4, spraying high-pressure gas or plasma onto the surface of the diaphragm 4, resulting in a uniform micron-nano-scale rough structure on the surface of the diaphragm 4. The roughened diaphragm 4 is then directly bonded to the substrate via adhesive bonding or lamination. The roughened surface provides a mechanical interlocking effect, enhancing the bonding strength.
[0030] Compared to existing technologies, the roughening nozzle 12 is connected to either a compressed gas device 13 or a plasma gas device 14. It sprays high-pressure gas onto the surface of the edge of the diaphragm 4, creating a uniform micron- to nanometer-scale rough structure; or it bombards the surface of the edge of the diaphragm 4 with plasma gas, introducing polar functional groups and increasing physical roughness. These methods of increasing the physical roughness of the diaphragm 4 surface do not have a negative impact on the environment and do not damage the material. This improves the adhesion between the diaphragm 4 and the display screen while reducing the cost of the bonding process. After roughening, the film bonding yield increases from 85% to 99.50%.
[0031] Preferably, when the roughening nozzle 12 is connected to the compressed gas device 13, the gas pressure ejected by the roughening nozzle 12 is 0.4-0.7 MPa, and the pressure formed on the diaphragm 4 by the high-pressure gas ejected by the roughening nozzle 12 is 40-60 Pa.
[0032] High-pressure gas directly modulates the surface roughening effect of the membrane through mechanical impact intensity and particle penetration depth. However, due to the small membrane thickness, excessively high-pressure gas can easily cause penetrating damage to the membrane, leading to material explosion. When the gas pressure is less than 0.4 MPa, the gas kinetic energy is too low to damage the smooth areas of the membrane surface. When the gas pressure is greater than 0.7 MPa, the excessive gas kinetic energy causes non-uniform sputtering or microcrack propagation on the membrane surface, resulting in edge detachment and damage. Examples include 0.4 MPa, 0.5 MPa, 0.6 MPa, and 0.7 MPa, but are not limited to these.
[0033] Preferably, the gas compressed by the gas compression device 13 is oxygen or helium.
[0034] In some embodiments, when the roughening nozzle 12 is connected to the plasma gas device 14, the roughening nozzle 12 can eject an atmospheric pressure plasma jet.
[0035] The working gas of the plasma gas device 14 is argon, nitrogen, or a helium-oxygen mixture.
[0036] Atmospheric pressure plasma jet is a highly active low-temperature plasma flow generated in an open space. It has the characteristics of high electron temperature (about 1-10 eV), gas temperature close to room temperature (as low as 300-600 K), and abundant active particles (electrons, ions, free radicals, etc.). Moreover, it does not require a vacuum environment, so it has a wide range of applications in many cutting-edge fields.
[0037] Ionized gas is extracted from the discharge cavity by means of dielectric barrier discharge (DBD), microwave discharge, or needle-ring electrode structures, driven by a gas flow (argon, helium, etc.), forming a directional jet. Atmospheric pressure cold plasma bombards the surface, introducing polar functional groups (such as -OH, -COOH) and increasing physical roughness.
[0038] More preferably, the sliding speed of the roughening nozzle 12 on the travel track 11 is 150-240 mm / s. The moving speed of the roughening nozzle 12 on the diaphragm 4 affects the roughening effect of the diaphragm. Specifically, when the sliding speed is less than 150 mm / s, the roughening nozzle 12 bombards the surface of the diaphragm for too long, which affects the roughening efficiency of the diaphragm 4 and easily causes through-and-through damage to the surface of the diaphragm 4; when the sliding speed is greater than 240 mm / s, the sliding speed is too fast to effectively roughen the surface of the diaphragm 4.
[0039] More preferably, the spraying time of the roughening nozzle 12 is 100-130 seconds. The spraying time of the roughening nozzle 12 on the roughening diaphragm affects the roughening effect of the diaphragm. When it is less than 100 seconds, the roughening time is too short, and the roughness of the diaphragm does not meet the process requirements. When it is greater than 130 seconds, the roughening time is too long, and the diaphragm is easily damaged.
[0040] Ideally, the roughness Ra of the membrane after treatment by the membrane roughening device 1 is ≥0.5μm.
[0041] Preferred, see Figure 3 As shown, the grasping device 2 includes an adsorption head 22 and a negative pressure pump 21. The negative pressure pump 21 is connected to the adsorption head 22, and the adsorption head 22 is used to adsorb the membrane 4. Since the membrane 4 is a delicate electronic component, it cannot be grasped directly by hand. Therefore, the grasping device 2 uses a negative pressure grasping method to avoid damage.
[0042] Preferably, the diaphragm bonding device 3 is a roller pressing device or an adhesive bonding device.
[0043] Preferred, see Figure 2 As shown, it also includes a diaphragm fixing device 5, which is used to fix the diaphragm 4, and the diaphragm roughening device 1 is located above the diaphragm fixing device 5.
[0044] In the specific implementation process, the diaphragm fixing device 5 fixes the diaphragm 4 in place and conveys it to the bottom of the diaphragm roughening device 1 along the conveying device 6. At this time, the roughening nozzle 12 is activated and begins to roughen the edge of the diaphragm 4 along the travel track 11.
[0045] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.
Claims
1. An adhesive system for MiniLED display film, characterized in that, Includes a membrane roughening device, a gripping device, and a membrane bonding device; The diaphragm roughening device includes a roughening nozzle and a travel track. The travel track is arranged along the edge of the diaphragm. The roughening nozzle and the travel track are slidably connected. The roughening nozzle is connected to a compressed gas device or a plasma gas device. The grasping device is used to grasp the roughened film and transport the film to the film bonding device, which is used to bond the roughened film to the LED display screen.
2. The adhesive system as claimed in claim 1, characterized in that, When the roughening nozzle is connected to the compressed gas device, the gas pressure ejected by the roughening nozzle is 0.4-0.7 MPa, and the pressure formed on the diaphragm by the high-pressure gas ejected by the roughening nozzle is 40-60 Pa.
3. The adhesive system as described in claim 2, characterized in that, The compressed gas device compresses oxygen or helium.
4. The adhesive system as claimed in claim 1, characterized in that, When the roughening nozzle is connected to the plasma gas device, the roughening nozzle can eject an atmospheric pressure plasma jet. The working gas of the plasma gas device is argon, nitrogen, or a helium-oxygen mixture.
5. The adhesive system according to any one of claims 1-4, characterized in that, The sliding speed of the roughening nozzle on the travel track is 150-240 mm / s.
6. The adhesive system as claimed in claim 5, characterized in that, The spraying time of the roughening nozzle is 100-130s.
7. The adhesive system according to any one of claims 1-4, characterized in that, The roughness Ra of the membrane after treatment by the membrane roughening device is ≥0.5μm.
8. The adhesive system as claimed in claim 1, characterized in that, The grasping device includes an adsorption head and a negative pressure pump, the negative pressure pump being connected to the adsorption head, and the adsorption head being used to adsorb the membrane.
9. The adhesive system as claimed in claim 1, characterized in that, The diaphragm bonding device is a roller pressing device or an adhesive bonding device.
10. The adhesive system as claimed in claim 1, characterized in that, It also includes a diaphragm fixing device for fixing the diaphragm, and the diaphragm roughening device is located above the diaphragm fixing device.