High-light-transmittance low-reflection Mini LED optical film material and dust-free laminating method thereof
By using an optical film material with a modified PET substrate layer, alternating nano-silica and magnesium fluoride coatings, and a UV-cured acrylic resin hardening layer, combined with a dust-free bonding method, the brightness loss and glare problems of the MiniLED screen are solved, the transmittance and reflectivity are improved, and a high bonding yield and long-term reliability are ensured.
Patent Information
- Application Number
- CN202510731792.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2025-09-19
AI Technical Summary
Traditional optical film materials have low light transmittance and high reflectivity, which leads to brightness loss and glare problems in MiniLED screens. Conventional bonding methods are prone to introducing dust or bubbles, causing interface defects between the film material and the substrate and poor long-term reliability.
Modified PET is used as the base layer, nano-silica and magnesium fluoride are alternately coated as the anti-reflection layer, UV-cured acrylic resin is used as the hardening layer, combined with dust-free bonding methods including electrostatic dust removal, roll-type bonding and UV curing, and hydrophobic nano-coating and plasma activation treatment are used to enhance the interface bonding strength.
It improves the light transmittance and reduces the reflectivity of the optical film, reduces the brightness loss and glare of the MiniLED screen, improves the bonding yield and long-term reliability, avoids the introduction of dust and bubbles, and ensures the interface quality between the film and the substrate.
Smart Images
Figure CN120669334A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of optical materials and display technology, and specifically to a MiniLED optical film material with high light transmittance and low reflection and a dust-free bonding method thereof. Background Art
[0002] Optical film is an optical dielectric material, specifically a single-layer or multi-layer transparent dielectric film coated on the surface of an optical element or independent substrate using dry and wet production processes. These dielectric films use the transmission, reflection, absorption, scattering, polarization and other reactions produced when light waves pass through them to achieve various effects such as reflection, anti-reflection, spectrometry, filtering and changing the polarization state of the light beam. The transmittance (<85%) and reflectivity (>3%) of traditional film materials lead to brightness loss and glare problems in MiniLED screens. Conventional bonding methods easily introduce dust or bubbles, resulting in interface defects between the film material and the substrate, with a yield rate of <95%. Existing anti-reflective films are prone to coating peeling or fogging in high temperature and high humidity environments, affecting long-term reliability. Summary of the Invention
[0003] To this end, the present invention provides a MiniLED optical film material with high light transmittance and low reflection and a dust-free bonding method thereof to solve the above-mentioned problems.
[0004] The present invention provides the following technical solution: a high-transmittance, low-reflection MiniLED optical film material, comprising a substrate layer, an anti-reflection layer, and a hardening layer, wherein the substrate layer is made of modified PET, the anti-reflection layer is made of alternating nano-silicon dioxide and magnesium fluoride coatings, the hardening layer is made of UV-curable acrylic resin, light-diffusing particles are added to the substrate layer, the bottom of the substrate layer is fixedly connected to the top of the anti-reflection layer, and the bottom of the anti-reflection layer is fixedly connected to the top of the hardening layer; A dust-free lamination method using a high-transmittance, low-reflection MiniLED optical film material includes the following steps: S1, pretreatment stage, the substrate layer, anti-reflection layer and hardening layer are electrostatically dusted in a clean room, the surface roughness is less than 10nm, and low-viscosity optical adhesive (viscosity 200-500cP, refractive index 1.48-1.52 after curing) is applied; S2, the bonding stage, uses a rolling bonding device with a pressure of 0.1-0.5MPa, a temperature of 25℃±2℃, and a rolling speed of 1-3mm / s. The interface bubbles are monitored in real time (via an infrared imager). When defects are found, the process is automatically paused and the vacuum adsorption machine is started for correction; S3, curing stage, UV curing (wavelength 365nm, intensity 50-100mW / cm 2 , time 10-20s) to ensure that there is no residual stress in the adhesive layer.
[0005] As a preferred solution of the present invention, in step S2, more specifically, the vacuum adsorption machine includes a working box, a bonding structure is installed inside the working box, cylinder guide rails are fixedly connected to the left and right sides of the working box, and a bonding component is installed inside the working box.
[0006] As a preferred solution of the present invention, the fitting component includes a rodless cylinder, the inner wall of the cylinder guide rail is slidably connected to the surface of the rodless cylinder, the front and rear sides of the inner surface of the rodless cylinder are fixedly connected to the first limit plate, the adjacent sides of the two first limit plates are fixedly connected to the second limit rod, the surface of the second limit rod is provided with a first slide plate, the top of the first limit plate is fixedly connected to the second limit plate, the front side of the first slide plate is penetrated by a first slide groove, the inner wall of the first slide groove is slidably connected to the surface of the second limit rod, the front side of the second limit plate is penetrated by a first through hole, The inner wall of the first through hole is rotatably connected to the first rotating rod, the surface of the first rotating rod is fixedly sleeved with a cylindrical cam, the top of the first slide is fixedly connected to the driven rod, the groove wall of the cylindrical cam is in contact with the top of the driven rod, the surface of the inner side of the first slide is fixedly connected to the first connecting plate, the inner side of the first connecting plate is fixedly connected to the third limiting rod, one end of the inner side of the third limiting rod is fixedly connected to the limiting block, the surface of the third limiting rod is provided with a fixed net, and second through holes are penetrated on both sides of the left and right sides of the top surface of the fixed net, and the inner wall of the second through hole is slidably connected to the surface of the third limiting rod.
[0007] As a preferred solution of the present invention, there are two cylinder guide rails, and the two cylinder guide rails are symmetrically distributed on the left and right.
[0008] As a preferred solution of the present invention, the back surfaces of the two second limiting plates at the rear side are fixedly connected to a rotating motor, and the output end of the rotating motor is fixedly connected to one end of the back of the first rotating rod through a coupling.
[0009] As a preferred solution of the present invention, the bonding structure includes a support frame, the bottom of the support frame is fixedly connected to the bottom of the working box, the inner surface of the support frame is fixedly connected to a flip axis plate, the inner wall of the flip axis plate is rotatably connected to a shaft, and a second connecting plate is fixedly provided on both sides of the left and right sides of the shaft surface, the top and bottom of the second connecting plate are fixedly connected to a vacuum back plate, and the two vacuum back plates are fixedly connected to a vacuum flip plate on the side away from each other, and the vacuum flip plate at the top is located at the bottom of the bonding component.
[0010] As a preferred solution of the present invention, the right side of the flip shaft plate on the right side is fixedly connected to an L-shaped plate, the inner wall of the L-shaped plate is rotatably connected to a second rotating rod, the surface fixed sleeve of the second rotating rod is provided with a driving gear, and the surface fixed sleeve of the shaft rod is provided with a driven gear, and the driven gear is meshed with the driving gear.
[0011] As a preferred solution of the present invention, an output motor is fixedly connected to the surface on the right side of the L-shaped plate, the output end of the output motor is fixedly connected to one end on the right side of the second rotating rod through a coupling, and an air pipe is slidably inserted into the inner wall of the shaft.
[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by starting the rodless cylinder and setting the cylinder guide rail, the rodless cylinder rises, and the two ends of the fixed net slide inward along the third limit rod, so that the fixed net completely fits the curved surface of the curved membrane, and the pressurization treatment begins in the working box. Observe the working box to make the fixed net completely fit the curved surface of the curved membrane, so that the curved surface of the curved membrane can be quickly fitted and it is difficult to deviate. By starting the second motor, the second motor rotates forward, so that the first rotating rod rotates forward, driving the cylindrical cam to rotate forward, and through the limitation of the second limit rod, the driven rod drives the first slide plate to move horizontally back and forth, so that the first connecting plate moves horizontally back and forth, so that the fixed net slides horizontally back and forth, and the vacuum flap The curved film is adsorbed so that the curved film will not be locally deformed due to the long-term immobility of the fixed net, and the horizontal forward and backward sliding of the fixed net can also effectively push out the bubbles to complete the processing of the curved film, avoiding the introduction of dust or bubbles when the curved film is bonded, resulting in interface defects between the film material and the substrate. By starting the output motor, the output motor rotates forward, driving the second rotating rod to rotate forward, causing the active gear to rotate forward, thereby driving the driven gear to reverse, causing the vacuum flip plate, vacuum back plate and flip connecting plate to flip 360 degrees, so that the film is located at the bonding position, and the film is processed through the working box. After pressurizing to the standard pressurizing time, the pressurization is stopped at this time to complete the bonding of the film.
[0013] 2. In the present invention, a hydrophobic nano-coating (contact angle>110°) is sprayed on the surface of the film material to inhibit moisture penetration, and the anti-reflection layer and the substrate layer are treated by plasma activation to enhance the interface bonding strength. The optical film material has a standard transmittance and a standard surface reflectivity, thereby avoiding the brightness loss and glare problems of the MiniLED screen. The bonding method is not easy to introduce dust or bubbles, which lead to interface defects between the film material and the substrate. By spraying a hydrophobic nano-coating (contact angle>110°) on the surface of the film material, moisture penetration is inhibited, and the anti-reflection layer and the substrate layer are treated by plasma activation to enhance the interface bonding strength, thereby enhancing long-term Reliability: The film material was placed in a constant temperature and humidity test chamber (60℃ / 90% RH) for 1000 hours to observe performance changes. The data results showed that the hydrophobic nano-coating (contact angle > 110°) and plasma activation treatment significantly improved weather resistance. The anti-reflection layer adhesion test evaluated the interface adhesion through the cross-hatch method. The data results showed that the plasma activation treatment increased the interface adhesion to the highest level. The hydrophobic performance test used a contact angle meter to measure the performance of the hydrophobic coating. The data results showed that the hydrophobic nano-coating effectively inhibited moisture penetration, and the contact angle was > 110°, meeting the long-term reliability requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the local structure in; Figure 3 For the present invention Figure 2 Schematic diagram of the local structure in; Figure 4 Schematic diagram of the structure of the bonding component in the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the local structure of the bonding component; Figure 6 This is a diagram showing the composition of the high-transmittance, low-reflection MiniLED optical film material in the present invention; Figure 7 is a flow chart of the laminating method of the present invention; Figure 8 It is a schematic diagram of the cylindrical cam structure in the present invention.
[0015] In the figure: 1. working box; 2. fitting component; 3. fitting structure; 4. cylinder guide rail; 201. fixed net; 202. second through hole; 203. first connecting plate; 204. third limiting rod; 205. limiting block; 206. first slide; 207. rodless cylinder; 208. first slide; 209. driven rod; 210. first through hole; 211. first limiting plate; 212. second limiting rod; 213. second limiting plate; 214. cylindrical cam; 215. first rotating rod; 301. support frame; 302. turning shaft plate; 303. air pipe; 304. vacuum flip plate; 305. vacuum back plate; 306. second connecting plate; 307. output motor; 308. shaft; 309. driven gear; 310. L-shaped plate; 311. driving gear; 312. second rotating rod. DETAILED DESCRIPTION
[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0017] See also Figures 1-8 The technical solution provided by the present invention specifically includes the following embodiments: Example: A high-transmittance, low-reflection MiniLED optical film material comprises a substrate layer, an anti-reflection layer, and a hardening layer. The substrate layer is made of modified PET, the anti-reflection layer is made of alternating nano-silicon dioxide and magnesium fluoride coatings, the hardening layer is made of UV-curable acrylic resin, light-diffusing particles are added to the substrate layer, the bottom of the substrate layer is fixedly connected to the top of the anti-reflection layer, and the bottom of the anti-reflection layer is fixedly connected to the top of the hardening layer. The preparation method of the modified PET comprises: mixing a PET raw material with a modifier containing epoxy groups and carboxyl functional groups at 220° C. for 1-3 hours, wherein the mass ratio of the modifier to the PET raw material is 1:10-1:20; The light diffusion particles are organic silicon light diffusion particles with a particle size of 0.5-5 μm, and their mass fraction in the substrate layer is 1%-5%. The number of layers of nano-silicon dioxide and magnesium fluoride alternating coating is 5-10, wherein the thickness of the nano-silicon dioxide layer is 50-100 nm, the thickness of the magnesium fluoride layer is 80-120 nm, and the thickness of the hardened layer is 20-50 μm. The substrate layer and the anti-reflection layer are fixedly connected by an acrylic adhesive, and the anti-reflection layer and the hardening layer are fixedly connected by a thermal curing composite process.
[0018] A modified PET substrate layer is prepared by obtaining modified PET particles according to a modified PET preparation method, and then the modified PET particles are melt-extruded through an extruder at 250-280° C., and then subjected to processes such as cooling, pulling, and stretching to prepare a substrate layer containing light diffusion particles; Prepare the anti-reflection layer by using physical vapor deposition technology to alternately deposit 5-10 layers of nano-silicon dioxide and magnesium fluoride films on top of the substrate layer to form a multi-layer alternating anti-reflection layer; Prepare a hardening layer, apply UV-curable acrylic resin on the bottom of the anti-reflection layer, and then use ultraviolet light to cure it with a curing energy of 500-1000mJ / cm2 to form a hardening layer with a thickness of 20-50um, thereby obtaining a high-transmittance and low-reflection MiniLED optical film material.
[0019] A dust-free bonding method using a high-transmittance, low-reflection MiniLED optical film material includes the following steps: S1, a pretreatment stage, wherein the substrate layer, anti-reflection layer, and hardening layer are electrostatically dusted in a clean room to a surface roughness of less than 10 nm, and low-viscosity optical adhesive (viscosity 200-500 cP, refractive index 1.48-1.52 after curing) is applied; S2, the bonding stage, uses a rolling bonding device with a pressure of 0.1-0.5MPa, a temperature of 25℃±2℃, and a rolling speed of 1-3mm / s. The interface bubbles are monitored in real time (via an infrared imager). When defects are found, the process is automatically paused and the vacuum adsorption machine is started for correction; S3, curing stage, UV curing (wavelength 365nm, intensity 50-100mW / cm 2 , time 10-20s), to ensure that there is no residual stress in the adhesive layer; The membrane surface is sprayed with a hydrophobic nano-coating (contact angle > 110°) to inhibit moisture penetration; The anti-reflection layer and the substrate layer are treated with plasma activation to enhance the interface bonding strength; The optical film material's light transmittance and surface reflectivity meet the standards; compared with the following data; The transmittance and reflectance tests were conducted using a spectrophotometer (PerkinElmer Lambda 950) to compare the film of the present invention with a conventional PET substrate film. The results are as follows: Test indicators Film material of the present invention Traditional membrane materials Light transmittance (%) ≥90％ <85％ Surface reflectivity (%) ≤1.5％ >3.0％ Test conditions 25℃, 50RH 25℃, 50RH Conclusion: The light transmittance of the film material of the present invention is increased by ≥5.0%, and the reflectivity is reduced by 1.5%, which effectively solves the brightness loss and glare problems of MiniLED screens.
[0020] The bonding yield comparison test was conducted by using the dust-free bonding method of the present invention (experimental group) and the conventional bonding process (control group) to perform a bonding experiment on 100 films: Group Experimental group (the present invention) control group Yield (%) ≥98％ <90％ Bubble defect rate (%) ≤0.5％ >2.0％ Dust introduction rate (%) 0.10％ ≥0.5％ Test Method: - Experimental Group: Roller lamination equipment (0.3 MPa pressure, 3 mm / s speed) in a cleanroom (Class 1000) with real-time infrared imaging monitoring. - Control Group: Manual lamination under conventional conditions.
[0021] Conclusion: The method of the present invention significantly improves the bonding yield and eliminates interface defects.
[0022] Long-term reliability test (high temperature and high humidity environment): the film material is placed in a constant temperature and humidity test chamber (60℃ / 90%RH) for 1000 hours to observe the performance changes: Test indicators Initial value After 1000 hours (present invention) After 1000 hours (traditional membrane material) Light transmittance (%) 92％ 0％ 85％ Reflectivity (%) 1.50％ 1.60％ 3％ Coating status No peeling No peeling, no fogging Local peeling and obvious fogging Conclusion: Hydrophobic nanocoating (contact angle > 110°) and plasma activation treatment significantly improve weather resistance.
[0023] Anti-reflective layer adhesion test, using the cross-cut method (ASTM D3359) to evaluate the interface adhesion: Test Method Film material of the present invention (plasma activation) Untreated membrane Bonding strength level (0-5) 5B (no shedding) 2B (≥35% shedding) Test conditions: 1mm grid spacing, 3M tape peel test. Conclusion: Plasma activation treatment improves the interfacial bonding strength to the highest level.
[0024] Hydrophobicity test: The hydrophobic coating performance was measured using a contact angle meter (Dataphysics OCA 50): Test samples Contact angle (°) Water drop falling time (s) Film material of the present invention 115° <5 Uncoated membrane 70° >30 Conclusion: The hydrophobic nanocoating effectively inhibits moisture penetration with a contact angle >110°, meeting the long-term reliability requirements.
[0025] To avoid brightness loss and glare problems on MiniLED screens, this bonding method is not prone to introducing dust or bubbles, which can cause interface defects between the film and the substrate. A hydrophobic nano-coating (contact angle > 110°) is sprayed on the surface of the film to inhibit moisture penetration. The anti-reflective layer and the substrate layer are treated with plasma activation to enhance interface bonding and long-term reliability.
[0026] In step S2, more specifically, the vacuum adsorption machine includes a working box 1, a bonding structure 3 is installed inside the working box 1, cylinder guide rails 4 are fixedly connected to the left and right sides of the working box 1, and a bonding component 2 is installed inside the working box 1.
[0027] The fitting component 2 includes a rodless cylinder 207, the inner wall of the cylinder guide rail 4 is slidably connected to the surface of the rodless cylinder 207, the front and rear sides of the inner surface of the rodless cylinder 207 are fixedly connected with a first limit plate 211, the adjacent side of the two first limit plates 211 is fixedly connected with a second limit rod 212, the surface of the second limit rod 212 is provided with a first slide 208, the top of the first limit plate 211 is fixedly connected with a second limit plate 213, the front side of the first slide 208 is penetrated by a first slide groove 206, the inner wall of the first slide groove 206 is slidably connected to the surface of the second limit rod 212, the front side of the second limit plate 213 is penetrated by a first through hole 210, the inner wall of the first through hole 210 is rotated A first rotating rod 215 is connected, a cylindrical cam 214 is fixedly sleeved on the surface of the first rotating rod 215, a driven rod 209 is fixedly connected to the top of the first slide 208, the groove wall of the cylindrical cam 214 abuts against the top of the driven rod 209, the inner surface of the first slide 208 is fixedly connected to the first connecting plate 203, the inner side of the first connecting plate 203 is fixedly connected to the third limiting rod 204, one end of the inner side of the third limiting rod 204 is fixedly connected to the limiting block 205, a fixed net 201 is provided on the surface of the third limiting rod 204, and second through holes 202 are penetrated on both sides of the top surface of the fixed net 201, and the inner wall of the second through hole 202 is slidably connected to the surface of the third limiting rod 204; The rodless cylinder 207 includes a fixed part and a movable part, and the cylinder guide rail 4 includes two guide rods. The fixed part of the rodless cylinder 207 is connected to one of the guide rods of the cylinder guide rail 4, and the movable part of the rodless cylinder 207 is connected to the other guide rod of the cylinder guide rail 4. A continuous return groove is provided on the surface of the cylindrical cam 214, and the driven rod 209 is slidingly connected to the groove wall of the continuous return groove provided on the surface of the cylindrical cam 214.
[0028] By starting the rodless cylinder 207, the rodless cylinder 207 is raised through the provided cylinder guide rail 4, and the two ends of the fixed net 201 slide inward along the third limit rod 204, so that the fixed net 201 completely fits the curved surface of the curved membrane, and the pressurization treatment is started in the working box 1. Observe the working box 1 to make the fixed net 201 completely fit the curved surface of the curved membrane, so that the curved surface of the curved membrane can be quickly fitted and it is difficult to deviate. By starting the second motor, the second motor rotates forward, causing the first rotating rod 215 to rotate forward, driving the cylindrical cam 214 to rotate forward, and through the third limit rod 204, the first rotating rod 215 is rotated forward. The limiting function of the second limiting rod 212 causes the driven rod 209 to drive the first slide plate 208 to move horizontally back and forth, causing the first connecting plate 203 to move horizontally back and forth, causing the fixed net 201 to slide horizontally back and forth, and the vacuum flap 304 to adsorb the curved film, so that the curved film will not be locally deformed due to the long-term immobility of the fixed net 201, and the horizontal back and forth sliding of the fixed net 201 can also effectively push out the bubbles, completing the processing of the curved film, avoiding the introduction of dust or bubbles when the curved film is bonded, resulting in interface defects between the film material and the substrate.
[0029] There are two cylinder guide rails 4 , and the two cylinder guide rails 4 are symmetrically distributed on the left and right.
[0030] The back surfaces of the two second limiting plates 213 at the rear side are both fixedly connected to a rotating motor, and the output end of the rotating motor is fixedly connected to one end of the back of the first rotating rod 215 through a coupling.
[0031] The bonding structure 3 includes a support frame 301, the bottom of the support frame 301 is fixedly connected to the bottom of the inside of the working box 1, the surface of the inner side of the support frame 301 is fixedly connected to the flip shaft plate 302, the inner wall of the flip shaft plate 302 is rotatably connected to the shaft rod 308, and the left and right sides of the surface of the shaft rod 308 are fixedly provided with a second connecting plate 306, the top and bottom of the second connecting plate 306 are fixedly connected to the vacuum back plate 305, and the side of the two vacuum back plates 305 away from each other is fixedly connected to the vacuum flip plate 304, and the top vacuum flip plate 304 is located at the bottom of the bonding component 2 The right side of the flip shaft plate 302 is fixedly connected to an L-shaped plate 310, and the inner wall of the L-shaped plate 310 is rotatably connected to the second rotating rod 312. The surface of the second rotating rod 312 is fixedly sleeved with a driving gear 311, and the surface of the shaft 308 is fixedly sleeved with a driven gear 309. The driven gear 309 is meshed with the driving gear 311. The surface of the right side of the L-shaped plate 310 is fixedly connected to the output motor 307. The output end of the output motor 307 is fixedly connected to one end on the right side of the second rotating rod 312 through a coupling. The inner wall of the shaft 308 is slidably plugged with an air pipe 303; By starting the output motor 307, the output motor 307 rotates forward, driving the second rotating rod 312 to rotate forward, causing the driving gear 311 to rotate forward, thereby driving the driven gear 309 to reverse, causing the vacuum flip plate 304, the vacuum back plate 305 and the flip connecting plate 306 to flip 180 degrees, so that the film is located at the bonding position, and the film is processed by the working box 1. After pressurizing to the standard pressurizing time, the pressurization is stopped at this time to complete the bonding of the film.
[0032] When the vacuum adsorption machine in this scheme is working, the material is placed above the fixed net 201, and the rodless cylinder 207 is started, and the cylinder guide rail 4 is provided to make the rodless cylinder 207 rise, and the two ends of the fixed net 201 slide inward along the third limit rod 204, so that the fixed net 201 is completely fitted with the curved surface of the curved film, and the pressurization treatment is started in the working box 1. The working box 1 is observed to make the fixed net 201 completely fit the curved surface of the curved film, so that the curved surface of the curved film can be quickly fitted and it is difficult to deviate. By starting the second motor, the second motor rotates forward, so that the first rotating rod 215 rotates forward, The cylindrical cam 214 is driven to rotate forward, and the second limiting rod 212 is limited, so that the driven rod 209 drives the first slide plate 208 to move horizontally back and forth, so that the first connecting plate 203 moves horizontally back and forth, and the fixed net 201 slides horizontally back and forth. The vacuum flap 304 adsorbs the curved film, so that the curved film will not be locally deformed due to the long-term immobility of the fixed net 201. The horizontal back and forth sliding of the fixed net 201 can also effectively push out bubbles, completing the processing of the curved film, avoiding the introduction of dust or bubbles when the curved film is bonded, resulting in interface defects between the film material and the substrate; By starting the output motor 307, the output motor 307 rotates forward, driving the second rotating rod 312 to rotate forward, causing the driving gear 311 to rotate forward, thereby driving the driven gear 309 to reverse, causing the vacuum flip plate 304, the vacuum back plate 305 and the flip connecting plate 306 to flip 180 degrees, so that the film is located at the bonding position, and the film is processed by the working box 1. After pressurizing to the standard pressurizing time, the pressurization is stopped at this time to complete the bonding of the film.
[0033] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations can be made to the embodiments without departing from the principles and spirit of the invention.
Claims
1. A MiniLED optical film with high light transmittance and low reflection, characterized by: The invention comprises a substrate layer, an anti-reflection layer and a hardening layer. The substrate layer is made of modified PET, the anti-reflection layer is made of alternating nano-silicon dioxide and magnesium fluoride coatings, the hardening layer is made of UV-cured acrylic resin, light-diffusing particles are added to the substrate layer, the bottom of the substrate layer is fixedly connected to the top of the anti-reflection layer, and the bottom of the anti-reflection layer is fixedly connected to the top of the hardening layer.
2. A dust-free lamination method using the high-transmittance, low-reflection MiniLED optical film material of claim 1, characterized in that: The following steps are involved: S1, pretreatment stage, the substrate layer, anti-reflection layer and hardening layer are electrostatically dusted in a clean room, the surface roughness is less than 10nm, and low-viscosity optical adhesive is applied; S2, the bonding stage, uses a rolling bonding device with a pressure of 0.1-0.5MPa, a temperature of 25℃±2℃, and a rolling speed of 1-3mm / s. The interface bubbles are monitored in real time. When defects are found, the device automatically pauses and starts the vacuum adsorption machine for correction. S3, curing stage, UV curing to ensure that there is no residual stress in the adhesive layer.
3. The dust-free lamination method according to claim 2, characterized in that: In step S2, more specifically, the vacuum adsorption machine includes a working box (1), a bonding structure (3) is installed inside the working box (1), cylinder guide rails (4) are fixedly connected to the left and right sides of the working box (1), and a bonding component (2) is installed inside the working box (1).
4. The dust-free lamination method according to claim 3, characterized in that: The fitting component (2) includes a rodless cylinder (207), the inner wall of the cylinder guide rail (4) is slidably connected to the surface of the rodless cylinder (207), the front and rear sides of the inner surface of the rodless cylinder (207) are fixedly connected with a first limiting plate (211), the adjacent side of the two first limiting plates (211) is fixedly connected with a second limiting rod (212), the surface of the second limiting rod (212) is provided with a first slide plate (208), the top of the first limiting plate (211) is fixedly connected with a second limiting plate (213), the front side of the first slide plate (208) is provided with a first sliding groove (206), the inner wall of the first sliding groove (206) is slidably connected to the surface of the second limiting rod (212), the front side of the second limiting plate (213) is provided with a first through hole (210), the inner wall of the first through hole (210) is provided with a first through hole (210) A first rotating rod (215) is rotatably connected, a cylindrical cam (214) is fixedly provided on the surface of the first rotating rod (215), a driven rod (209) is fixedly connected to the top of the first slide plate (208), a groove wall of the cylindrical cam (214) abuts against the top of the driven rod (209), a first connecting plate (203) is fixedly connected to the inner surface of the first slide plate (208), a third limiting rod (204) is fixedly connected to the inner side of the first connecting plate (203), one end of the inner side of the third limiting rod (204) is fixedly connected to the limiting block (205), a fixed net (201) is provided on the surface of the third limiting rod (204), a second through hole (202) is penetrated on both sides of the top surface of the fixed net (201), and the inner wall of the second through hole (202) is slidably connected to the surface of the third limiting rod (204).
5. The dust-free lamination method according to claim 4, characterized in that: The number of the cylinder guide rails (4) is two, and the two cylinder guide rails (4) are symmetrically distributed left and right.
6. The dust-free lamination method according to claim 4, characterized in that: The back surfaces of the two second limiting plates (213) at the rear side are both fixedly connected to a rotating motor, and the output end of the rotating motor is fixedly connected to one end of the back of the first rotating rod (215) via a coupling.
7. The dust-free lamination method according to claim 3, characterized in that: The bonding structure (3) includes a support frame (301), the bottom of the support frame (301) is fixedly connected to the bottom of the inside of the working box (1), the inner surface of the support frame (301) is fixedly connected to a flip axis plate (302), the inner wall of the flip axis plate (302) is rotatably connected to a shaft (308), and second connecting plates (306) are fixedly provided on the left and right sides of the surface of the shaft (308), the top and bottom of the second connecting plate (306) are fixedly connected to a vacuum back plate (305), and the sides of the two vacuum back plates (305) that are away from each other are fixedly connected to a vacuum flip plate (304), and the top vacuum flip plate (304) is located at the bottom of the bonding component (2).
8. The dust-free lamination method according to claim 7, characterized in that: The right side of the flip shaft plate (302) is fixedly connected to an L-shaped plate (310), and the inner wall of the L-shaped plate (310) is rotatably connected to a second rotating rod (312). The surface of the second rotating rod (312) is fixedly sleeved with a driving gear (311), and the surface of the shaft (308) is fixedly sleeved with a driven gear (309), and the driven gear (309) is meshed with the driving gear (311).
9. The dust-free lamination method according to claim 8, characterized in that: An output motor (307) is fixedly connected to the surface on the right side of the L-shaped plate (310), and an output end of the output motor (307) is fixedly connected to one end on the right side of the second rotating rod (312) via a coupling. An air pipe (303) is slidably inserted into the inner wall of the shaft (308).