Vacuum full-lamination device for LCM (liquid crystal module) and lamination process of vacuum full-lamination device

Abstract

The invention discloses an LCM display module vacuum full-lamination device and a lamination process thereof, the LCM display module vacuum full-lamination device comprises curing and drying equipment, a control module, a rack, an air cylinder and a filling mechanism, the control module is assembled on the right side of the curing and drying equipment, the rack is assembled at the upper end of the curing and drying equipment, and the air cylinder is assembled at the top of an inner cavity of the rack. According to the LCM display module vacuum full-lamination device and the lamination process thereof, the curing speed and the colloid strength are balanced, the operation difficulty and the skill requirements on personnel are greatly reduced, meanwhile, the workpiece machining period is short, the manufacturing cost is low, glue in the heating box is automatically lifted, the injection long pipe is conveniently drawn out, and meanwhile the production efficiency is improved. And the situation that the device continuously heats the glue is avoided, so that the using effect of the glue is improved, the finished product quality of the LCM after glue processing is improved, the glue on the top of the sliding plate is automatically stirred, the processing operation quality of the glue on the LCM is improved, and the overall using effect of the device is improved.

Description

Technical Field

[0001] The present invention relates to the field of bonding display screens and touch screens, and in particular to an LCM display module vacuum full-bonding device and its bonding process. Background Art

[0002] A new bonding process and new technology are applied in new energy vehicle navigation systems and touch display screens. With the development of display screen technology, as a simple, convenient, and natural human-computer interaction device, display screens have been widely used in various fields such as mobile phones, new energy vehicle navigation systems, industrial control, medical treatment, and self-service terminals, greatly facilitating users, especially elderly users, thus bringing a brand-new user experience. When bonding a display screen (usually a liquid crystal screen component) by dispensing glue and bonding a touch screen, the display areas of the display screen for injecting glue and the touch screen are bonded. However, this will bond between the touch screen and the display screen component, achieving high definition and integration. With the rapid development of new energy vehicle intelligence, the in-vehicle touch display industry chain has actively laid out, and the automotive cockpit has been upgraded from an "intelligent cockpit" to an "intelligent passenger cabin", with more designs centered around the interaction between "people" and the vehicle. In-vehicle displays show development trends such as large screens, multiple screens, and multiple forms. Touch is redefining the automotive human-computer interaction experience. For a more interactive and entertaining in-vehicle touch display, to achieve the touch function, bonding support is indispensable.

[0003] In the prior art, due to the limitations of the LCM structure, for the full-bonding solution of the iron-frame LCM, liquid water glue is used for bonding to meet the structural deviations brought by the iron frame. The advantages of liquid water glue are not affected by objective factors such as structure, thickness, flatness, and shape. Liquid water glue can naturally flow to fill uneven material forms. Since the gaps in the iron frame layer need to be filled, sealed, dammed, and edged with RTV and other protective measures, the operation difficulty is high and the requirements for personnel skills are high. At the same time, the bonding efficiency is low, the equipment cost is high, and the product production cycle is long. Many factors lead to high manufacturing costs. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present application provides an LCM display module vacuum full-bonding device and its bonding process to solve the technical problems that the manufacturing process of the above-mentioned liquid water glue is complex, the operation difficulty is high, the requirements for personnel skills are high, at the same time the bonding efficiency is low, the equipment cost is high, and the product production cycle is long, and many factors lead to high manufacturing costs.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a vacuum full-bonding device for an LCM display module, comprising a curing and drying device, a control module, a frame, a cylinder and a perfusion mechanism, wherein the control module is mounted on the right side of the curing and drying device, the frame is mounted on the upper end of the curing and drying device, the cylinder is mounted on the top of the inner cavity of the frame, the output end of the cylinder is connected to the perfusion mechanism, the perfusion mechanism comprises a heating box, a slide is slidably connected to the interior of the heating box, a stirring mechanism is evenly arranged on the top of the slide, a long perfusion tube is evenly connected to the outer top of the heating box, the bottom of the slide is connected to a suction cup group through a T-shaped long arm, partitions are connected to both sides of the slide, and the outside of the partition is connected to the inner cavity of the heating box.

[0006] The stirring mechanism comprises a transverse axis, stirring rods are evenly arranged on the outside of the transverse axis, gears are connected to both sides of the transverse axis, racks are meshedly connected to the outside of the gears, and the racks are assembled on both sides of the inner cavity of the heating box.

[0007] Preferably, both sides of the front of the curing and drying equipment are connected with doors through hinges, the front of the door is equipped with handles, and the outside of the handles is equipped with anti-slip pads, and both sides of the top of the curing and drying equipment are equipped with electric clamps. The door can completely seal the curing and drying equipment for use, the handles make it convenient for the staff to drive the door to rotate, and the anti-slip pads can improve the stability when the staff drives the door to rotate. The electric clamp is a common electric clamping device in the prior art, which consists of a power source, a clamping mechanism, a control system and a main structure, wherein the power source, the clamping mechanism and the control system are all assembled inside the main structure.

[0008] Preferably, springs are evenly distributed on the bottom of the slide plate, and the bottom of the springs is connected to the bottom of the inner cavity of the heating box. The slide plate can slide upward inside the heating box, and the springs can drive the slide plate to return to its original position after the movement is completed.

[0009] Preferably, the outside of the T-shaped long arm is sleeved with a sealing sleeve, and the sealing sleeve is embedded in the bottom of the inner cavity of the heating box. The suction cup group includes a suction cup, and the outside of the suction cup is connected to a one-way valve tube. The sealing sleeve can improve the air tightness between the T-shaped long arm and the heating box. The suction cup group can fix the position of the LCM, and the one-way valve tube increases the discharge speed of the gas inside the suction cup, thereby greatly increasing the fixing speed of the suction cup to the LCM, and the one-way valve tube can only exhaust but not take in air.

[0010] Preferably, the top of the heating box is connected to a feed port, and the top of the feed port is connected to a cover, the heating box includes a box body, heaters are embedded in the bottoms on both sides of the inner cavity of the box body, and a control sensor is installed on the outside of the box body, the outside of the control sensor is connected to the heater through a line, the feed port is convenient for the staff to add different types of glue to the top of the inner cavity of the heating box, the cover can close the feed port, and the control sensor can control the heating power of the heater inside the heating box, so that different glues inside can be heated at different temperatures.

[0011] Preferably, the perfusion long tube includes a bent pipe, the outside of the bent pipe is connected to a micro water pump, and the output port of the bent pipe is connected to a nozzle, the outside of the transverse axis is sleeved with a sealed bearing, and the sealed bearing is embedded in the outside of the partition, the partition includes a transverse tube, the transverse tube is connected to the sealed bearing, the top of the transverse plate is equipped with an elastic belt, and the elastic belt is connected to the inner cavity of the heating box, the bent pipe cooperates with the micro water pump to draw in and discharge the glue on the top of the inner cavity of the heating box, the nozzle can inject the glue into the interior of the LCM for use, and the sealed bearing can support the transverse axis, thereby improving the stability of the transverse axis during assembly.

[0012] A LCM display module vacuum full lamination process, based on the above-mentioned LCM display module vacuum full lamination device, comprises: S1: Liquid optical adhesive bonding preparation stage The display function, touch sensitivity and circuit connectivity of the LCM are tested, and defective products are eliminated. The original metal frame of the LCM is removed to expose the edge area that needs to be bonded. The cylinder is started to drive the heating box to descend, and the LCM is fixed by the combination of the suction cup group and the electric clamp. RTV is coated on the edge of the LCM to form an internal sealing layer to prevent subsequent glue injection from overflowing. The LCM is placed inside the curing and drying equipment and left to stand for 8 hours, waiting for the RTV to be completely cured, and the LCM function is retested to ensure that no damage is caused during the disassembly and packaging process.

[0013] S2: Cleaning and protective treatment Use plasma cleaning equipment to remove organic matter, oxides and dust on the surface of LCM to improve the bonding strength of the colloid. Apply RTV around the LCM to build a closed dam structure and define the liquid glue filling area. Perform independent functional testing on TP to ensure the accuracy of touch coordinates. Paste protective tape on the IR hole of TP to prevent contamination in subsequent processes. Visually inspect the surface of TP for scratches, foreign matter or optical defects.

[0014] S3: Alignment and Fitting The TP and LCM are initially aligned by an electric fixture, with the error controlled within ±0.1 mm. The assembled components are left standing for 8 hours to initially expel the air at the interface. A protective tape is wrapped around the edge of the LCM to prevent the overflow of the glue during injection and contamination of the surrounding area.

[0015] S4: Injection and Curing of Liquid Glue Start the perfusion long tube to inject LOCA into the RTV dam. The amount of glue needs to precisely match the height difference. After injection, the components are left standing for 8 hours to wait for the glue to initially cure. Then the components are placed in a vacuum chamber to remove the air bubbles in the glue, avoiding rainbow patterns or dark spots in the display area.

[0016] S5: Post-treatment and Inspection Remove the tape wrapped around the edge to expose the bonding area. Visually inspect whether the bonding interface is flat, without glue overflow, burrs, and optical defects. Age for 24 hours in a high-temperature and high-humidity environment to verify the weather resistance of the glue. Use a lint-free cloth dipped in alcohol to wipe the surface, and check the cleanliness again. Manually apply RTV again at the edge or weak area to enhance the structural reliability. After sealing the RTV, leave it standing for 8 hours to ensure complete curing.

[0017] S6: Solid Optical Adhesive Bonding Processing Stage Conduct display function, touch sensitivity, and circuit connectivity tests on the LCM in the S5: Post-treatment and Inspection. Reject defective products. Use plasma cleaning or alcohol wiping to remove dust, oil stains, and residues on the surface of the LCM to ensure the cleanliness of the bonding surface. Conduct independent touch coordinate accuracy, sensitivity, and optical performance tests on the TP. Clean the surface of the TP with IPA to avoid the influence of particulate matter on the bonding quality.

[0018] S7: Solid Glue Coating and Pretreatment Evenly apply OSA on the bonding surface of the TP through the perfusion long tube, and control the glue layer thickness within 0.1 mm - 0.3 mm.

[0019] S8: Precision Alignment and Bonding Stack the glue-coated TP and LCM in a vacuum adsorption jig, and automatically correct the offset through a CCD vision positioning system with an accuracy of ±5 μm.

[0020] S9: Curing and Inspection Transfer the bonded components to the inside of a curing and drying device, and irradiate with ultraviolet light with a wavelength of 365 nm. The curing energy is 800 - 1200 mJ / cm², and the time is 30 seconds to 60 seconds. Visually inspect whether the bonding interface is flat, without glue overflow, burrs, and optical abnormalities. Attach a protective film to isolate dust and avoid scratching during subsequent handling.

[0021] S10: Final Inspection and Shipment Retest the TP touch coordinate accuracy and LCM display effect, verify the integrity of the screen display function, including touch response and multi-area display consistency, spot check key indicators, yield ≥ 99.5%, package and store qualified products, and return or scrap unqualified products.

[0022] Preferably, in the S1: liquid optical glue bonding preparation stage, S2: cleaning and protective treatment, S3: alignment and bonding, S4: liquid glue injection and curing, S5: post-processing and detection, S6: solid optical glue bonding treatment stage and S7: solid glue coating and pretreatment, LCM is a liquid crystal module, RTV is room temperature vulcanized silicone rubber, TP is a touch screen panel, IR hole is an infrared sensing hole on the outside of the touch screen panel, LOCA is liquid optical glue, IPA is isopropyl alcohol, and OSA is solid optical glue.

[0023] Preferably, in the S7: solid glue coating and pretreatment, the coated TP is placed in a curing and drying device, and the temperature of the curing and drying device is adjusted to 25°C±2°C.

[0024] Preferably, in the S8: precise alignment and bonding, the pressure is 0.3-0.8 MPa, and the time is 30 seconds to 60 seconds of pressure maintenance.

[0025] In summary, the present application provides a LCM display module vacuum full lamination device and lamination process thereof, which has the following beneficial effects: 1. The LCM display module vacuum full bonding device and its bonding process, by combining the UV pre-curing of the curing and drying equipment used in the liquid optical adhesive bonding preparation stage in step S1 with the post-baking method using the curing and drying equipment in step S9, can balance the curing speed and the colloid strength, greatly reduce the operating difficulty and the skill requirements for the operator, thereby reducing the workpiece processing cycle and reducing the manufacturing cost.

[0026] 2. The LCM display module vacuum full bonding device and its bonding process. When LCM is processed, the position of LCM can be quickly fixed by the added suction cup group, thereby greatly improving the stability of LCM during processing. In addition, the added slide plate can automatically lift the glue inside the heating box when the suction cup group is fixing the LCM, which is convenient for the extraction of the long injection tube and avoids the device from continuously heating the glue, thereby improving the use effect of the glue and improving the quality of the finished LCM after the glue processing.

[0027] 3. For the vacuum full lamination device of the LCM display module and its lamination process, when the slide plate is lifted, the glue on the top of the slide plate is automatically stirred through the added horizontal axis, stirring rod, gear and rack, avoiding the phenomenon of glue solidification during use, thus preventing the perfusion long tube from being blocked by solidified glue, improving the quality of the glue's processing operation on the LCM, and enhancing the overall use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the front schematic view of the present invention.

[0029] Figure 2 is the plan schematic view of the present invention.

[0030] Figure 3 is the plan schematic view of the perfusion mechanism of the present invention.

[0031] Figure 4 is the external schematic view of the perfusion mechanism of the present invention.

[0032] Figure 5 is the partial cross-sectional view of the perfusion mechanism of the present invention.

[0033] Figure 6 is the external schematic view of the stirring mechanism of the present invention.

[0034] Figure 7 is the schematic view of the process working of the present invention.

[0035] DESCRIPTION OF THE REFERENCE NUMERALS: 1. Curing and drying equipment; 11. Box door; 12. Electric fixture; 2. Control module; 3. Frame; 4. Cylinder; 5. Perfusion mechanism; 51. Heating box; 52. Slide plate; 53. Spring; 54. Partition board; 55. T-shaped long arm; 56. Suction cup group; 57. Sealing sleeve; 58. Feed inlet; 6. Stirring mechanism; 61. Horizontal axis; 62. Stirring rod; 63. Gear; 64. Rack; 65. Sealing bearing; 7. Perfusion long tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0037] The present application provides a technical solution. Please refer to Figure 1 and Figure 2, An LCM display module vacuum full lamination device, comprising a curing and drying device 1, a control module 2, a frame 3, a cylinder 4 and a pouring mechanism 5. The control module 2 is assembled on the right side of the curing and drying device 1, the frame 3 is assembled on the upper end of the curing and drying device 1, the cylinder 4 is assembled on the top of the inner cavity of the frame 3, and the output end of the cylinder 4 is connected with a pouring mechanism 5. The pouring mechanism 5 includes a heating box 51, a slide plate 52 is slidably connected inside the heating box 51, stirring mechanisms 6 are evenly arranged on the top of the slide plate 52, pouring long tubes 7 are evenly communicated with the outer top of the heating box 51, the bottom of the slide plate 52 is connected with a suction cup group 56 through a T-shaped long arm 55, and both sides of the slide plate 52 are connected with partition plates 54, and the outside of the partition plates 54 is connected with the inner cavity of the heating box 51.

[0038] The curing and drying device 1 is a common UV curing device in the prior art, a device that uses a UV light source to cure UV coatings. Through ultraviolet irradiation, a chemical reaction occurs in the photosensitizer in the special formula resin, thereby triggering a polymerization reaction, converting the coating from a liquid state to a solid state within a few seconds. At the same time, a heating device is assembled inside the curing and drying device 1, and a temperature control device is assembled outside the heating device. The curing and drying device 1 is composed of a light source system, a ventilation system, a control system and a housing, and the light source system, the ventilation system and the control system are all assembled inside the housing cavity.

[0039] The control module 2 is a common control device in the prior art, used to control the operation of the electronic components inside the device. The frame 3 is used to support the cylinder 4. The cylinder 4 is a common lifting device in the prior art. The top of the inner cavity of the heating box 51 can be filled with glue, the slide plate 52 can drive the glue to move, the T-shaped long arm 55 can be connected with the suction cup group 56, and the suction cup group 56 can fix the LCM. The partition plate 54 can cooperate with the slide plate 52 to divide the inner cavity of the heating box 51.

[0040] Please refer to Figure 6 , The stirring mechanism 6 includes a horizontal shaft 61, stirring rods 62 are evenly arranged outside the horizontal shaft 61, gears 63 are connected to both sides of the horizontal shaft 61, and racks 64 are meshed outside the gears 63, and the racks 64 are assembled on both sides of the inner cavity of the heating box 51.

[0041] The horizontal shaft 61 can fix the stirring rods 62, the stirring rods 62 can stir the glue, the gears 63 cooperate with the racks 64 to drive the horizontal shaft 61, and at the same time, the setting of the partition plate 54 can prevent the transmission of the gears 63 and the racks 64 from being blocked by the glue, thereby improving the stability of the overall transmission of the stirring mechanism 6, and multiple groups of stirring mechanisms 6 are provided and can be started simultaneously to stir the glue.

[0042] Please refer to Figure 2, on both sides of the front of the curing and drying device 1, there are box doors 11 connected by hinges. On the front of the box door 11, there is a handle assembled, and an anti-slip pad is assembled outside the handle. The box door 11 can completely seal the curing and drying device 1 for use. The handle facilitates the staff to drive the box door 11 to rotate, and the anti-slip pad can improve the stability when the staff drives the box door 11 to rotate. The electric fixture 12 is a common electric clamping device in the prior art, which consists of a power source, a clamping mechanism, a control system and a main body structure. Among them, the power source, the clamping mechanism and the control system are all assembled inside the main body structure.

[0043] Please refer to Figure 3 and Figure 4 , springs 53 are evenly distributed at the bottom of the sliding plate 52, and the bottom of the springs 53 is connected to the bottom of the inner cavity of the heating box 51. The sliding plate 52 can slide up inside the heating box 51, and the springs 53 can drive the sliding plate 52 to return after the movement is completed.

[0044] A sealing sleeve 57 is sleeved outside the T-shaped long arm 55, and the sealing sleeve 57 is embedded in the bottom of the inner cavity of the heating box 51. The suction cup group 56 includes suction cups, and a one-way valve tube is communicated outside the suction cups. The sealing sleeve 57 can improve the airtightness between the T-shaped long arm 55 and the heating box 51. The suction cup group 56 can fix the position of the LCM, and the one-way valve tube can improve the discharge speed of the gas inside the suction cup, thereby greatly improving the fixing speed of the suction cup to the LCM. The one-way valve tube can only exhaust and cannot intake air.

[0045] The top of the heating box 51 is communicated with a feed inlet 58, and the top of the feed inlet 58 is communicated with a cover. The heating box 51 includes a box body. Heaters are embedded at the bottom of both sides of the inner cavity of the box body, and a control sensor is assembled outside the box body. The outside of the control sensor is connected to the heater through a circuit. The feed inlet 58 facilitates the staff to add different types of glue to the top of the inner cavity of the heating box 51. The cover can close the feed inlet 58, and the control sensor can control the heating power of the heater inside the heating box 51, so as to realize heating different glues at different temperatures inside.

[0046] Please refer to Figure 6The long perfusion tube 7 includes a bend pipe, the outside of the bend pipe is connected to a micro water pump, and the output port of the bend pipe is connected to a nozzle. The outside of the horizontal axis 61 is sleeved with a sealed bearing 65, and the sealed bearing 65 is embedded in the outside of the partition 54. The partition 54 includes a horizontal tube, which is connected to the sealed bearing 65. The top of the horizontal plate is equipped with an elastic belt, which is connected to the inner cavity of the heating box 51. The bend pipe cooperates with the micro water pump to draw in and discharge the glue on the top of the inner cavity of the heating box 51, and the nozzle can inject the glue into the interior of the LCM for use. The sealed bearing 65 can support the horizontal axis 61, thereby improving the stability of the horizontal axis 61 during assembly.

[0047] See also Figure 7 , a LCM display module vacuum full lamination process, based on the above-mentioned LCM display module vacuum full lamination device, including: S1 Liquid Optical Adhesive Bonding Preparation Stage: The display function, touch sensitivity and circuit connectivity of the LCM are tested, and defective products are eliminated. The original metal frame of the LCM is removed to expose the edge area that needs to be bonded. The cylinder 4 is started to drive the heating box 51 to descend, and the LCM is fixed by the cooperation of the suction cup group 56 and the electric clamp 12. RTV is coated on the edge of the LCM to form an internal sealing layer to prevent subsequent glue injection from overflowing. The LCM is placed inside the curing and drying equipment 1 and left to stand for 8 hours, waiting for the RTV to be completely cured, and the LCM function is re-tested to ensure that the disassembly and packaging process does not cause damage.

[0048] S2 Cleaning and Protection Treatment: Use plasma cleaning equipment to remove organic matter, oxides and dust on the surface of LCM to improve the bonding strength of the colloid. Apply RTV around the LCM to build a closed dam structure and define the liquid glue filling area. Perform independent functional testing on TP to ensure the accuracy of touch coordinates. Paste protective tape on the IR hole of TP to prevent contamination in subsequent processes. Visually inspect the surface of TP for scratches, foreign matter or optical defects.

[0049] S3 alignment and fit: The TP and LCM are preliminarily aligned by the electric clamp 12, and the error is controlled within ±0.1mm. The superimposed components are left to stand for 8 hours to preliminarily exhaust the interface air, and the edge of the LCM is wrapped with protective tape to prevent the colloid from overflowing and contaminating the surrounding area during the injection.

[0050] S4 liquid glue injection and curing: Start the injection long tube 7 to inject LOCA into the RTV dam. The amount of glue must accurately match the height of the step difference. After injection, let the component stand for 8 hours to wait for the initial solidification of the colloid. Put the component into the vacuum cavity and remove the bubbles in the colloid to avoid rainbow lines or dark spots in the display area.

[0051] S5 post-processing and detection: Remove the tape covering the edge to expose the bonding area, visually inspect whether the bonding interface is flat, free of glue overflow, burrs and optical defects, age it in a high temperature and high humidity environment for 24 hours to verify the weather resistance of the colloid, wipe the surface with alcohol using a dust-free cloth, check the cleanliness again, apply RTV a second time on the edges or weak areas to enhance structural reliability, and let it stand for 8 hours after sealing with RTV to ensure complete curing.

[0052] S6 solid optical adhesive bonding process stage: The display function, touch sensitivity and circuit connectivity of LCM in S5 post-processing and inspection are tested, and defective products are eliminated. Plasma cleaning or alcohol wiping is used to remove dust, oil and residue on the surface of LCM to ensure the cleanliness of the bonding surface. The TP is independently tested for touch coordinate accuracy, sensitivity and optical performance. IPA is used to clean the TP surface to prevent particulate matter from affecting the bonding quality.

[0053] S7 solid glue coating and pretreatment: OSA is uniformly applied on the TP bonding surface by pouring the long tube 7, and the thickness of the adhesive layer is controlled at 0.1mm-0.3mm.

[0054] S8 precision alignment and bonding: The glue-coated TP and LCM are stacked in a vacuum adsorption fixture and automatically corrected for offset with a CCD visual positioning system with an accuracy of ±5μm.

[0055] S9 curing and testing: Transfer the bonded components to the interior of the curing and drying equipment 1, and use 365nm wavelength ultraviolet irradiation, curing energy 800-1200mJ / cm², time 30 seconds to 60 seconds, visually inspect whether the bonding interface is flat, without glue overflow, burrs and optical abnormalities, and attach a protective film to isolate dust and avoid scratches during subsequent handling.

[0056] S10 final inspection and shipment: Retest the TP touch coordinate accuracy and LCM display effect, verify the integrity of the screen display function, including touch response and multi-area display consistency, spot check key indicators, yield ≥ 99.5%, package and store qualified products, and return or scrap unqualified products.

[0057] In S1 liquid optical adhesive bonding preparation stage, S2 cleaning and protection treatment, S3 alignment and bonding, S4 liquid adhesive injection and curing, S5 post-processing and inspection, S6 solid optical adhesive bonding treatment stage and S7 solid adhesive coating and pretreatment, LCM is liquid crystal module, RTV is room temperature vulcanized silicone rubber, TP is touch screen panel, IR hole is the infrared sensing hole on the outside of the touch screen panel, LOCA is liquid optical adhesive, IPA is isopropyl alcohol, and OSA is solid optical adhesive.

[0058] In S7 solid-state glue coating and pretreatment, the coated TP is placed inside the curing and drying equipment 1, and the temperature of the curing and drying equipment 1 is adjusted to 25°C ± 2°C. S8: In precise alignment and lamination, the pressure is 0.3 - 0.8 MPa, and the time is 30 - 60 seconds of pressure holding.

[0059] In this solution, LOCA and OSA are first respectively loaded into the top of the inner cavity of different heating boxes 51, and the heating boxes 51 are started to heat the two different glues. The LCM is placed on the top of the curing and drying equipment 1, and the electric fixture 12 is started to fix the LCM. When processing the LCM, the cylinder 4 is started to drive the heating box 51 and the suction cup group 56 to descend. The suction cup group 56 presses on the top of the LCM, and cooperates with the electric fixture 12 to fix the LCM to avoid shaking during processing. At the same time, the slide plate 52 is restricted. When the heating box 51 descends, the slide plate 52 rises inside the heating box 51, driving the horizontal shaft 61 and the gear 63 to mesh and rotate with the rack 64, and finally driving the stirring rod 62 to rotate to stir the LOCA and OSA in the inner cavity of the heating box 51. At the same time, the positions of LOCA and OSA are raised to avoid continuous heating of LOCA and OSA by the heating box 51 during use. Finally, the LOCA and OSA are pumped out for use through the perfusion long tube 7.

[0060] By combining the 30-second UV pre-curing of the curing and drying equipment adopted in the liquid optical glue lamination preparation stage of step S1 with the method of post-baking using the curing and drying equipment in step S9, the curing speed and the colloid strength are balanced, the operation difficulty and the skill requirements for operators are greatly reduced, thereby reducing the workpiece processing cycle and the manufacturing cost.

[0061] Through the added suction cup group 56, the LCM can be accurately adsorbed and fixed at multiple points, effectively suppressing the displacement deviation caused by vibration or external force during the processing. The fixing stiffness of the LCM is increased by more than 40% through the vacuum adsorption principle, ensuring that the lamination accuracy reaches the ±0.05 mm level. The linkage design of the slide plate 52 and the heating box 51 is adopted: when the suction cup group starts the fixing action, the slide plate synchronously triggers the glue lifting mechanism. This design keeps the relative position between the glue liquid level and the perfusion long tube 7 at the best extraction height all the time, avoiding the risk of flow interruption caused by the fluctuation of the glue liquid level in the traditional process, and shortening the continuous heating time of the heating box by 60%. The probability of glue thermal degradation is significantly reduced. The stirring system built in the slide plate 52 drives the gear 63 and the rack 64 transmission mechanism through the horizontal shaft 61, driving the three groups of spiral stirring rods 62 to perform three-dimensional disturbance at a speed of 120 rpm. This design makes the internal shear rate of the glue reach 0.8 / s, effectively suppressing the agglomeration of polymer chains, and can extend the gel time of the glue to more than 3 times that of the traditional process.

[0062] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0063] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vacuum full lamination device for LCM display modules, comprising a curing and drying device (1), a control module (2), a frame (3), a cylinder (4) and a filling mechanism (5), wherein the control module (2) is mounted on the right side of the curing and drying device (1), the frame (3) is mounted on the upper end of the curing and drying device (1), and the cylinder (4) is mounted on the top of the inner cavity of the frame (3), characterized in that: The output end of the cylinder (4) is connected to a pouring mechanism (5), the pouring mechanism (5) comprising a heating box (51), a slide plate (52) being slidably connected to the interior of the heating box (51), a stirring mechanism (6) being evenly arranged on the top of the slide plate (52), a long pouring tube (7) being evenly connected to the top of the outer side of the heating box (51), a suction cup group (56) being connected to the bottom of the slide plate (52) via a T-shaped long arm (55), both sides of the slide plate (52) being connected to a partition plate (54), the outside of the partition plate (54) being connected to the inner cavity of the heating box (51); The stirring mechanism (6) comprises a transverse axis (61), stirring rods (62) are evenly distributed on the outside of the transverse axis (61), gears (63) are connected to both sides of the transverse axis (61), and racks (64) are meshedly connected to the outside of the gears (63), and the racks (64) are mounted on both sides of the inner cavity of the heating box (51).

2. The LCM display module vacuum full lamination device according to claim 1, characterized in that: Both sides of the front of the curing and drying device (1) are connected to a box door (11) via hinges, the front of the box door (11) is equipped with a handle, and the outside of the handle is equipped with an anti-slip pad, and both sides of the top of the curing and drying device (1) are equipped with electric clamps (12).

3. The LCM display module vacuum full lamination device according to claim 1, characterized in that: Springs (53) are evenly distributed on the bottom of the slide plate (52), and the bottom of the springs (53) is connected to the bottom of the inner cavity of the heating box (51).

4. The LCM display module vacuum full lamination device according to claim 1, characterized in that: The outside of the T-shaped long arm (55) is sleeved with a sealing sleeve (57), and the sealing sleeve (57) is embedded in the bottom of the inner cavity of the heating box (51). The suction cup group (56) comprises a suction cup, and the outside of the suction cup is connected to a one-way valve pipe.

5. The LCM display module vacuum full lamination device according to claim 1, characterized in that: The top of the heating box (51) is connected to a feed port (58), and the top of the feed port (58) is connected to a cover. The heating box (51) comprises a box body, heaters are embedded at the bottoms of both sides of the inner cavity of the box body, and a control sensor is installed on the outside of the box body, and the outside of the control sensor is connected to the heater via a line.

6. The LCM display module vacuum full lamination device according to claim 1, characterized in that: The long perfusion tube (7) comprises a curved tube, the outside of which is connected to a micro water pump, and the output port of which is connected to a nozzle, the outside of the transverse axis (61) is sleeved with a sealed bearing (65), the sealed bearing (65) is embedded in the outside of the partition (54), the partition (54) comprises a transverse tube, the transverse tube is connected to the sealed bearing (65), the top of the transverse plate is equipped with an elastic belt, and the elastic belt is connected to the inner cavity of the heating box (51).

7. A LCM display module vacuum full lamination process, based on a LCM display module vacuum full lamination device according to any one of claims 1 to 6, characterized in that: include: S1 Liquid Optical Adhesive Bonding Preparation Stage: The display function, touch sensitivity and circuit connectivity of the LCM are tested, the cylinder (4) is started to drive the heating box (51) to descend, the LCM is fixed by the combination of the suction cup group (56) and the electric clamp (12), RTV is coated on the edge of the LCM, the LCM is placed inside the curing and drying equipment (1) and left to stand for 8 hours, and the LCM function is retested; S2 cleaning and protective treatment; S3 alignment and fit: The TP and LCM are preliminarily aligned by an electric clamp (12), the superimposed components are left to stand for 8 hours to preliminarily exhaust the interface air, and protective tape is wrapped around the edge of the LCM; S4 liquid glue injection and curing: Start the injection long tube (7) to inject LOCA into the RTV dam. After injection, let the assembly stand for 8 hours. Then put the assembly into a vacuum chamber to remove bubbles in the colloid. S5 post-processing and detection; S6 solid optical adhesive bonding process stage: Perform display function, touch sensitivity and circuit connectivity tests on the LCM in the S5 post-processing and testing, remove defective products, use plasma cleaning or alcohol wiping to remove dust, oil and residue on the surface of LCM, perform independent touch coordinate accuracy, sensitivity and optical performance tests on TP, and use IPA to clean the TP surface; S7 solid glue coating and pretreatment: Evenly distribute OSA on the TP bonding surface by perfusing the long tube (7); S8 precision alignment and bonding: The glued TP and LCM are stacked in a vacuum adsorption fixture, and the offset is automatically corrected through the CCD visual positioning system; S9 curing and testing: Transfer the bonded components to the interior of the curing and drying equipment (1), and irradiate with ultraviolet light at a wavelength of 365 nm, with a curing energy of 800-1200 mJ / cm² for 30 to 60 seconds. Visually inspect whether the bonding interface is flat, free of glue overflow, burrs, and optical anomalies, and attach a protective film to isolate dust; S10 final inspection and shipment.

8. The LCM display module vacuum full bonding process according to claim 7, characterized in that: The S2 cleaning and protection treatment includes using plasma cleaning equipment to remove organic matter, oxides and dust on the surface of the LCM, spot-coating RTV around the LCM, performing independent functional testing on the TP, pasting protective tape on the IR hole of the TP, and visually inspecting whether there are scratches, foreign matter or optical defects on the surface of the TP; The S5 post-processing and inspection includes removing the tape covering the edge, exposing the bonding area, visually inspecting whether the bonding interface is flat, free of glue overflow, burrs and optical defects, aging for 24 hours in a high temperature and high humidity environment to verify the weather resistance of the colloid, wiping the surface with alcohol using a dust-free cloth, checking the cleanliness again, applying RTV a second time on the edge or weak area, and leaving it to stand for 8 hours after sealing with RTV.

9. The LCM display module vacuum full bonding process according to claim 7, characterized in that: During the S7 solid glue coating and pretreatment, the coated TP is placed inside the curing and drying device (1), and the temperature of the curing and drying device (1) is adjusted to 25°C ± 2°C.

10. The LCM display module vacuum full lamination process according to claim 7, characterized in that: In the S8 precision alignment and bonding, the pressure is 0.3-0.8 MPa and the pressure is maintained for 30 seconds to 60 seconds.

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