Full-laminating process of touch liquid crystal display panel easy to disassemble

Abstract

This invention discloses a fully laminating process for an easily removable touch LCD panel, including steps such as applying solid adhesive to the sensor functional sheet, aligning the sensor functional sheet with the cover plate, pre-pressing and laminating the product, debubbling, inspection, UV curing, re-lamination, and completion. This invention uses SCA solid film for full lamination. After the SCA solid film is hot-pressed and laminated using a COF pre-pressing laminator, visual defects can be assessed before the SCA solid film is fully cured. Defective products can be re-lamination by injecting ethanol without damaging the product. The re-lamination of the cover plate and sensor functional sheet can be reused for re-lamination, effectively reducing resource waste and production costs.

Description

Technical Field

[0001] This invention relates to the field of full lamination technology for large-size liquid crystal display panels of the 6th generation and above, and in particular to a full lamination process for an easy-to-remove touch liquid crystal display panel. Background Technology

[0002] In the existing technology, the bonding structure of touch LCD panels is designed to be bonded with liquid water adhesive (LOCA adhesive). The appearance problems can only be inspected after the liquid water adhesive is cured and bonded. After the touch LCD panel is bonded with water adhesive, there will be abnormalities such as fuzz, impurities, white spots, bubbles and bonding misalignment.

[0003] This problem is particularly severe in large-sized touch LCD panels, such as those from generation 6 and above. The main issues are that the liquid adhesive tends to flow during the bonding process, easily forming air bubbles that are difficult to remove. High bonding precision is required, making manual bonding impossible and placing extremely high demands on the bonding equipment. Furthermore, the bonding efficiency is extremely low.

[0004] Whether there are abnormalities such as fuzz, impurities, white spots, bubbles, and misalignment in the touch LCD panel can only be detected after bonding. However, by this time the adhesive has already cured and the screen is completely bonded and fixed. The disassembly process will inevitably damage the screen or functional components, so it is impossible to disassemble and re-bond. Touch LCD panels with abnormalities or other defects can only be scrapped. Due to current technological limitations, the scrap rate of most touch screen manufacturers is 20-30% on average, which is a serious waste of resources.

[0005] In the prior art, Chinese invention patent application CN201811130827.9 discloses a method for bonding a touch screen, which aims to reduce the generation of air bubbles during the bonding process. Specifically, it uses OCA solid adhesive to bond the TFT screen and the TP screen. By reducing the stress difference between the TP screen and the OCA optical adhesive, its core technical purpose is to eliminate small air bubbles generated between the TP screen and the OCA optical adhesive, thereby improving the bonding effect of the touch screen. Similarly, the removal process will inevitably damage the TFT screen and the TP screen. Therefore, after the OCA optical adhesive has cured, it is impossible to remove and re-bond them. Chinese invention patent application CN201811130827.9 does not disclose how to solve other abnormal or undesirable phenomena besides air bubbles.

[0006] Chinese invention patent application CN202110916699.6 discloses a full lamination method, a touch display module, and a full lamination system. The main purpose is to address the technical problems of relatively low lamination efficiency and the tendency for residual air bubbles to form. Specifically, a UV-type liquid adhesive or a thermosetting liquid adhesive is first applied to the surface of the first screen. Utilizing the high fluidity of the liquid adhesive, it fills in any steps on the first screen and ensures a level surface. The liquid adhesive is then cured to form a solid adhesive. Finally, the first and second screens, with the solid adhesive attached, are laminated together. Before lamination, any abnormalities (air bubbles and dirt) can be repaired. However, by this time, the liquid adhesive has already solidified and cannot be removed from the surface of either the first or second screen. Other abnormalities that cannot be resolved through repair are also unresolved. Especially after full lamination, if defects such as loose threads, impurities, white spots, air bubbles, lamination misalignment, or other defects are found during inspection, these issues cannot be addressed. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a fully lamination process for easily reversible touch LCD panels. This process does not alter the original main process and allows for the reversible disassembly and reuse of semi-finished panels that exhibit abnormalities or poor lamination, thereby avoiding waste and reducing production costs.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is: a fully laminating process for an easily removable touch LCD display panel, comprising the following steps:

[0009] In the process of applying solid adhesive to the SENSOR functional sheet, at the solid adhesive bonding station, first align the four edges of one SENSOR functional sheet with the four edges of one SCA solid adhesive sheet of the same size. Press the SCA solid adhesive sheet onto the bonding surface of the SENSOR functional sheet. Check and confirm that the four edges of the SCA solid adhesive sheet and the SENSOR functional sheet are fully aligned, so that the SCA solid adhesive sheet does not extend beyond the edge of the SENSOR functional sheet.

[0010] The SENSOR functional sheet and cover plate alignment steps are as follows: Place a SENSOR functional sheet with SCA solid film attached into the cover plate pressing fixture frame and adhere it with the SCA solid film facing upwards. Place a cover plate into the cover plate pressing fixture frame, aligning the lower edge of the cover plate with the lower edge of the SENSOR functional sheet. Then flatten the cover plate and press it onto the SCA solid film to obtain a lightly bonded panel. Gas or bubbles squeezed out during the pressing process are discharged through capillary exhaust channels.

[0011] In the product pre-pressing and bonding step, the light bonding panel is placed on the platform of the COF pre-pressing and bonding machine with the cover plate of the initial panel facing upward. The pre-pressing and bonding is completed by the COF pre-pressing and bonding machine to obtain the pre-bonded panel.

[0012] In the degassing step, each pre-bonded panel is placed into a corresponding degassing fixture, and the degassing machine is started to degas the panel to obtain a semi-finished panel.

[0013] The inspection process involves checking the semi-finished panels for any abnormalities or defects.

[0014] Semi-finished panels that pass inspection and show no abnormalities or defects are marked as properly bonded. These properly bonded panels are then directly transferred to the next process, an LED cold light source UV machine, for UV cold light curing. After undergoing the UV cold light curing step...

[0015] Semi-finished panels that show abnormalities or defects during inspection are marked as defective products, and the corresponding reasons for the abnormalities are marked. Defective products are then sent to the re-disassembly station for re-disassembly processing and the re-disassembly steps are performed.

[0016] UV cold light curing step,

[0017] The inspection process is completed within 6 hours and the material is sent to the LED cold light source UV machine for UV cold light curing treatment, so that the cover plate, SCA solid film and SENSOR functional sheet are solidified into one piece.

[0018] Once the steps are completed and the product has cured, it will be transferred to the next process after passing inspection.

[0019] The re-disassembly step involves receiving defective products returned during the inspection step at the re-disassembly station.

[0020] For defective products marked as having only surface dirt during the inspection process, the cover plate and sensor sheet of the defective product are first cleaned with a lint-free surface dampened with an appropriate amount of petroleum ether. After cleaning and passing inspection, these products are returned as good products to the LED cold light source UV machine for UV cold light curing.

[0021] For defective products marked as having abnormal bonding layers during the inspection process, a small amount of ethanol is injected into the bonding interface between the cover plate and the sensor sheet using a syringe. This fills the bonding interfaces between the cover plate and the solid adhesive, as well as between the sensor sheet and the solid adhesive, with ethanol, forming a liquid ethanol isolation layer. The cover plate and sensor sheet are then separated and cleaned. After cleaning, the cover plate and sensor sheet from the defective product are recovered. Finally, the recovered cover plate and sensor sheet are transferred to the solid adhesive bonding station to perform the solid adhesive bonding step for the sensor sheet. The cover plate and sensor sheet from the defective products are recycled and reused.

[0022] The advantages of this invention compared to the prior art are:

[0023] 1. In the process of this invention, after the SCA solid film is hot-pressed and bonded by the COF pre-press laminating machine, before the SCA solid film is fully cured, appearance problems can be judged. Defective products can be removed by injecting ethanol without damaging the product. The cover plate and sensor functional sheet obtained from the removal can be reused and re-bonded, effectively reducing resource waste, avoiding waste, and reducing production costs.

[0024] 2. This invention does not change the original main process, and does not require changes or replacements to the original full lamination equipment or the layout of the full lamination production line. The main change of this invention is the use of SCA solid film for full lamination processing, and the addition of a re-disassembly step and related processing. Semi-finished panels with abnormal phenomena or poor lamination can be re-disassembled and reused. The technology upgrade is simple, convenient, and has a short cycle, with extremely low technical transformation costs.

[0025] 3. This invention also solves the problems of easy glue flow, easy generation of air bubbles and difficulty in removing air bubbles, extremely high requirements for bonding equipment and extremely low bonding efficiency in the existing technology during the full bonding process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the touch liquid crystal display panel of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of an SCA solid film with LOCA semi-cured particles molded on its surface.

[0028] Figure 3 This is a structural diagram of the disassembly fixture.

[0029] 1. SENSOR Functional Chip

[0030] 2. SCA solid film

[0031] 21. SCA film

[0032] 22. LOCA semi-cured granules

[0033] 23. Capillary exhaust channel

[0034] 3. Cover plate

[0035] 4. Liquid ethanol isolation layer

[0036] 5. Disassembly fixture

[0037] 51. Injection site

[0038] 52. Drainage port

[0039] 53. Sealing strip Detailed Implementation

[0040] A fully lamination process for an easily reversible touch LCD panel includes the following steps:

[0041] In the process of applying solid adhesive to the SENSOR functional sheet, at the solid adhesive bonding station, first align the four edges of one SENSOR functional sheet 1 with the four edges of one SCA solid adhesive sheet 2 of the same size. Press the SCA solid adhesive sheet 2 onto the bonding surface of the SENSOR functional sheet 1. Check and confirm that the four edges of the SCA solid adhesive sheet 2 and the SENSOR functional sheet 1 are completely aligned, so that the SCA solid adhesive sheet 2 does not extend beyond the edge of the SENSOR functional sheet 1.

[0042] SCA solid film 2 is a solid film obtained by processing an SCA adhesive film 21 with a thickness of 600-700μm. LOCA liquid optical adhesive is sprayed onto the surface of SCA solid film 2 through nano-spraying, and then subjected to UV micro-curing treatment, so that the upper and lower surfaces of SCA solid film 2 are respectively covered with relatively uniformly distributed LOCA semi-cured particles 22. Figure 2 As shown, the LOCA semi-cured particles 22 are flattened spherical or hemispherical in shape, and their height is controlled between 16-25 μm. This creates interconnected capillary venting channels 23 on the surface of the SCA solid film 2, formed by the gaps between the LOCA semi-cured particles 22. These capillary venting channels 23 have extremely strong venting capabilities, rapidly expelling gas and any air bubbles that may be generated during the bonding process. This invention uses the SCA solid film 2 for full bonding, significantly reducing the technical requirements of the bonding equipment, increasing bonding efficiency by 1-2 times, and avoiding problems such as adhesive flow and the unavoidable air bubble formation and difficulty in removing air bubbles inherent in liquid adhesive bonding processes.

[0043] Preferably, in the step of applying solid adhesive to the SENSOR functional sheet, the SCA solid film 2 is processed from an SCA adhesive film 21 with a thickness of 600μm. The height of the LOCA semi-cured particles 22 is 21-23μm, the average width is 41-49μm, the average spacing between two adjacent LOCA semi-cured particles 22 is 81-89μm, the height of the capillary venting channel 23 is the same as the height of the LOCA semi-cured particles 22, the average spacing between the capillary venting channel 23 and the LOCA semi-cured particles 22 is the same, and the refractive index of the SCA solid film 2 relative to the glass is 1.4847.

[0044] Specifically, multiple horizontally placed SCA solid films 2 are continuously conveyed forward by a first conveyor belt. The conveying speed of the first conveyor belt is set to 3.5-4.5 meters per minute. A row of nano-spray nozzles is arranged above the first conveyor belt. Each nano-spray nozzle sprays LOCA liquid optical adhesive downwards, spraying LOCA liquid optical adhesive mist particles. The average particle size of the LOCA liquid optical adhesive mist particles is controlled at 45-50 μm. A nano-mist band filled with uniformly distributed LOCA liquid optical adhesive mist particles is formed between the nano-spray nozzles and the conveyor belt, slowly falling towards the conveyor belt. The width of the nano-mist band is larger than the width of the SCA solid films 2. After the SCA solid films 2 are conveyed through the nano-mist band, relatively uniformly distributed LOCA liquid optical adhesive mist droplets are attached to the surface of the SCA solid films 2, and then they are transferred to the second conveyor belt.

[0045] The conveying speed of the second conveyor belt is set to 6-7 cm / s. Only one UV curing lamp is installed above the second conveyor belt, and the UV irradiation energy of the UV curing lamp is set to 100-200 MJ / cm². 2 The second conveyor SCA solid film 2 passes quickly from below the UV curing lamp tube. The total irradiation time of any LOCA liquid optical adhesive mist droplet by the UV curing lamp tube is less than 1.5 seconds. Due to insufficient UV irradiation energy and insufficient irradiation time, the LOCA liquid optical adhesive mist droplet cannot be cured, forming a UV micro-curing process. The UV micro-curing process cures only 25-35% of the LOCA liquid optical adhesive mist droplet according to its volume ratio.

[0046] In the SENSOR functional sheet cover plate alignment step 3, place a SENSOR functional sheet 1 with an SCA solid film 2 already attached into the cover plate pressing fixture frame, and adhere it with the SCA solid film 2 facing upwards.

[0047] Place a cover plate 3 into the cover plate pressing fixture frame, align the lower edge of the cover plate 3 with the lower edge of the SENSOR functional sheet 1, then flatten the cover plate 3 and press it onto the SCA solid film 2 to obtain a lightly bonded panel. The gas or bubbles squeezed out during the pressing process are discharged through the capillary exhaust channel 23.

[0048] For the product pre-pressing and bonding step, modify the parameter table of the COF pre-pressing and bonding machine and set the pressing parameters. The vacuum setting of the COF pre-pressing and bonding machine is 0.1-0.2 MPa, the hot pressing temperature is set to 77-79℃, and the hot pressing time is set to 85-95 seconds.

[0049] The light-bonded panel is placed on the platform of the COF pre-press laminating machine, with the cover plate 3 of the initial panel facing upwards. Pre-press lamination is completed using the COF pre-press laminating machine. During the first 50 seconds of pre-press lamination, the light-bonded panel expels gas or air bubbles through the capillary exhaust channel 23. After pre-press lamination, the LOCA semi-cured particles 22 on the upper and lower surfaces of the SCA solid film 2 deform under pressure and fuse together to form a LOCA film layer with a thickness of 6-8 μm. The LOCA semi-cured particles 22 and the formed capillary exhaust channel 23 disappear, resulting in the pre-bonded panel.

[0050] LOCA liquid optical adhesive (English: Liquid Optical Clear Adhesive) is used in this invention. The LOCA film layer with a thickness of 6-8μm has a total transmittance of >99.5%. LOCA liquid optical adhesive has the advantages of low curing shrinkage, high adhesion, high weather resistance, water resistance, high temperature resistance, and UV resistance. It will not yellow, peel, or deteriorate after long-term use. This invention also makes good use of the advantages of high adhesion and low curing shrinkage of LOCA liquid optical adhesive to establish a bidirectional bonding interface layer with higher adhesion between the cover plate 3 and SCA solid film 2. After pre-pressing by a COF pre-pressing laminator, each L in the LOCA film layer The central region of the OCA semi-cured particles 22 has localized LOCA liquid optical adhesive penetrating to a depth of 0.5-1 μm below the surface of the SCA solid film 2, or penetrating to a depth of 0.5-1 μm below the surface of the cover plate 3. In the subsequent UV cold light curing process, it is completely cured into a whole without the formation of material interfaces. No new light refractive interfaces that cause changes in light refractive index are formed, and the bonding strength can be further increased. In addition, the process of the present invention determines that the present invention does not have and does not need to solve the technical problems such as easy glue flow caused by the characteristics of LOCA liquid optical adhesive.

[0051] For the degassing step, modify the degassing parameters of the degassing machine, setting the degassing pressure to 0.35-0.45 MPa, the degassing temperature to 68-73℃, and the degassing time to 30-35 minutes.

[0052] Place each pre-bonded panel into a corresponding degassing fixture, then arrange multiple degassing fixtures neatly on the plate inside the degassing machine, close the lid of the degassing machine, check and confirm that the lid of the degassing machine is closed, start the degassing machine to perform degassing treatment, and obtain a semi-finished panel.

[0053] The inspection process involves checking the semi-finished panels for any abnormalities or defects.

[0054] Semi-finished panels that pass inspection and show no abnormalities or defects are marked as properly bonded. These properly bonded panels are then directly transferred to the next process, an LED cold light source UV machine, for UV cold light curing. After undergoing the UV cold light curing step...

[0055] Semi-finished panels that show abnormalities or defects during inspection are marked as defective products, and the corresponding reasons for the abnormalities are marked. Defective products are then sent to the re-disassembly station for re-disassembly processing and the re-disassembly steps are performed.

[0056] UV cold light curing step,

[0057] The production time of the semi-finished panels is controlled within 0.5 hours, and the produced semi-finished panels undergo inspection within 0.2-6 hours before being sent to the LED cold light source UV machine for UV cold light curing treatment.

[0058] Set the operating conditions of the LED cold light source in the LED cold light source UV machine, and set its UV irradiation energy to 4500-5000 MJ / cm². 2 The conveyor belt speed is set to 3.5-4.5 meters per minute.

[0059] The laminated product is transferred to the belt conveyor of the LED cold light source UV machine. The sensor functional sheet 1 of the laminated product is placed facing upwards on the cold light source belt. The laminated product is conveyed by the belt through the LED cold light source of the LED cold light source UV machine, so that the cover plate 3, SCA solid film 2 and sensor functional sheet 1 are bonded together as one. Figure 1 As shown.

[0060] Once the steps are completed and the product has cured, it will be transferred to the next process after passing inspection.

[0061] The re-disassembly step involves receiving defective products returned during the inspection step at the re-disassembly station.

[0062] For defective products marked as having only surface dirt during the inspection process, the surfaces of the cover plate 3 and the sensor functional piece 1 of the defective product are first cleaned with a lint-free surface dampened with an appropriate amount of petroleum ether. After cleaning, products that pass inspection are returned as good products to the LED cold light source UV machine for UV cold light curing.

[0063] The bonding interface between the cover plate 3 and the SENSOR functional sheet 1 includes the interface between the cover plate 3 and the SCA solid film 2, as well as the interface between the SENSOR functional sheet 1 and the SCA solid film 2.

[0064] For defective products marked as having abnormal bonding layers during the inspection process, a small amount of ethanol is injected into the bonding interface between the cover plate 3 and the SENSOR functional sheet 1 using a syringe. This fills the bonding interfaces between the cover plate 3 and the solid adhesive, as well as between the SENSOR functional sheet 1 and the solid adhesive, with ethanol, forming a liquid ethanol isolation layer 4. The liquid ethanol isolation layer 4 has a cleaning function and can also separate the cover plate 3 from the SCA solid adhesive sheet 2 and the SENSOR functional sheet 1 from the SCA solid adhesive sheet 2. This achieves the non-destructive separation of the cover plate 3 and the SENSOR functional sheet 1. The separated cover plate 3 and SENSOR functional sheet 1 are then cleaned. After cleaning, the cover plate 3 and SENSOR functional sheet 1 from the defective products are recovered. Finally, the recovered cover plate 3 and SENSOR functional sheet 1 are transferred to the solid adhesive bonding station to perform the SENSOR functional sheet solid adhesive bonding step. The cover plate 3 and SENSOR functional sheet 1 from the defective products are recycled and reused.

[0065] During the reassembly step, the defective product is placed into the disassembly fixture 5. Figure 3 As shown, the front and rear sides and the right side of the defective product are sealed by the sealing strip 53 set in the disassembly fixture 5. Ethanol is injected through the injection port 51 on the right side of the disassembly fixture 5. The injection pressure of the ethanol is 0.3-0.4 MPa. The ethanol is forced into the bonding interface between the cover plate 3 and the SENSOR functional piece 1 through the liquid guide groove connected to the injection port 51. Since the disassembly fixture 5 seals the three sides of the defective product, a micro injection needle 54 is slidably installed at the inner end of the injection port 51 between the injection port 51 and the defective product. The injection port 51 is connected to the injection needle 54. The inner end of the injection needle 54 is provided with a needle tip. The needle tip is provided with an upward-facing bevel. The needle tip is inserted into the bonding interface between the cover plate 3 and the SENSOR functional piece 1 to facilitate the flow of ethanol into the bonding interface.

[0066] In addition, the bonding interface between the cover plate 3 and the SENSOR functional sheet 1 has the weakest bonding force. Under the action of liquid pressure, the ethanol liquid will move in the direction of the weakest bonding force. Under the action of hydraulic pressure, the ethanol liquid will automatically enter the bonding interface between the cover plate 3 and the SENSOR functional sheet 1 and move along the bonding interface between the cover plate 3 and the SENSOR functional sheet 1. Specifically, under the action of hydraulic pressure, the ethanol liquid will automatically enter the interface between the cover plate 3 and the SCA solid film 2 and the interface between the SENSOR functional sheet 1 and the SCA solid film 2, and form a liquid ethanol isolation layer 4 at the interface between the cover plate 3 and the SCA solid film 2 and the interface between the SENSOR functional sheet 1 and the SCA solid film 2, respectively. After the two interfaces are completely filled with ethanol liquid, the excess ethanol liquid will be discharged through the drain port 52 set on the right side of the disassembly fixture 5.

[0067] During the disassembly step, after ethanol is discharged from the drain port 52, the drain port 52 is sealed with a plug. The injection pressure of the ethanol is increased by 0.5-0.6 MPa and maintained for 3-5 seconds, increasing the thickness of the formed liquid ethanol isolation layer 4 to 200-300 μm. Increasing the thickness of the liquid ethanol isolation layer 4 increases the relative distance between the cover plate 3 and the SENSOR functional piece 1, making it easier for the cover plate 3 and the SENSOR functional piece 1 to separate relative to each other, and also preventing damage to the cover plate 3 and the SENSOR functional piece 1 during the disassembly process.

[0068] The disassembly fixture 5 includes an upper template and a lower template. The upper template has an upper positioning sealing cavity, and the lower template has a lower positioning sealing cavity. A guide mechanism and a drive mechanism are installed between the lower templates. The SENSOR functional piece 1 of the defective product is placed into the lower positioning sealing cavity, and the upper template is pressed onto the lower template. The upper template is then tightened onto the lower template by a locking mechanism installed on the upper template. The cover plate 3 of the defective product is placed in the upper positioning sealing cavity. After the liquid ethanol isolation layer 4 is formed, the locking mechanism is released, and the upper template is locked to the guide mechanism to restrict the relative horizontal movement of the upper and lower templates. The drive mechanism is then connected to the upper template, and the upper template is driven to move horizontally relative to the lower template. The restriction of the upper and lower positioning sealing cavities causes the cover plate 3 and the SENSOR functional piece 1 to move horizontally relative to each other, thereby separating the cover plate 3 and the SENSOR functional piece 1 without damaging them.

[0069] There is a mold closing interface between the upper and lower mold plates. After the defective product is placed into the lower positioning and sealing cavity, the top surface of the SENSOR functional piece is lower than the mold closing interface. The upper part of the upper positioning and sealing cavity is provided with a clearance space for the cover plate 3 to float upward.

[0070] 1. In the process of this invention, after the SCA solid film 2 is hot-pressed and bonded by the COF pre-press laminating machine, before the SCA solid film 2 is fully cured, appearance problems can be judged. Defective products can be removed by injecting ethanol without damaging the product. The cover plate 3 and the sensor functional sheet 1 obtained from the removal can be reused and re-bonded, effectively reducing resource waste and avoiding waste. The average defect rate of only 20-30% in the cover plate 3 and sensor functional sheet 1 can reduce the production cost by more than 20%. With the comprehensive reduction of equipment requirements and the improvement of bonding efficiency, the overall production cost is reduced by at least 40% on the existing basis.

[0071] 2. This invention does not change the original main process, and does not require changes or replacements to the original full lamination equipment or the layout of the full lamination production line. The main change of this invention is the use of SCA solid film 2 for full lamination processing, and the addition of a re-disassembly step and related processing. Semi-finished panels with abnormal phenomena or poor lamination can be re-disassembled and reused. The technology upgrade is simple, convenient, and has a short cycle, with extremely low technical transformation costs.

[0072] 3. This invention also solves the problems of easy glue flow, easy generation of air bubbles and difficulty in removing air bubbles, extremely high requirements for bonding equipment and extremely low bonding efficiency in the existing technology during the full bonding process.

Claims

1. A fully lamination process for an easily reversible touch LCD display panel, characterized in that: Includes the following steps, In the process of applying solid adhesive to the SENSOR functional sheet, at the solid adhesive bonding station, first align the four edges of one SENSOR functional sheet with the four edges of one SCA solid adhesive sheet of the same size. Press the SCA solid adhesive sheet onto the bonding surface of the SENSOR functional sheet. Check and confirm that the four edges of the SCA solid adhesive sheet and the SENSOR functional sheet are fully aligned, so that the SCA solid adhesive sheet does not extend beyond the edge of the SENSOR functional sheet. SCA solid film is a solid film obtained by processing SCA adhesive film with a thickness of 600-700μm. LOCA liquid optical adhesive is sprayed onto the surface of the SCA solid film through nano-spraying, followed by UV micro-curing. The upper and lower surfaces of the SCA solid film are covered with relatively uniformly distributed LOCA semi-cured particles. The height of the LOCA semi-cured particles is controlled at 16-25μm, so that the surface of the SCA solid film has interconnected capillary venting channels formed by the gaps between the LOCA semi-cured particles. The height of the capillary venting channels is the same as the height of the LOCA semi-cured particles. The LOCA semi-cured particles are flattened round or hemispherical in shape, and the average spacing between the capillary venting channels and the LOCA semi-cured particles is the same. In the SENSOR functional sheet alignment step, place a SENSOR functional sheet with the SCA solid film already applied into the cover plate pressing fixture frame, and adhere it with the SCA solid film of the SENSOR functional sheet facing upwards. Place a cover plate into the cover plate pressing fixture frame, align the lower edge of the cover plate with the lower edge of the SENSOR functional sheet, then flatten the cover plate and press it onto the SCA solid film to obtain a lightly bonded panel. Gas or bubbles squeezed out during the pressing process are discharged through capillary exhaust channels. For the product pre-pressing and bonding step, modify the parameter table of the COF pre-pressing and bonding machine and set the pressing parameters. The vacuum setting of the COF pre-pressing and bonding machine is 0.1-0.2 MPa, the hot pressing temperature is set to 77-79℃, and the hot pressing time is set to 85-95 seconds. Place the light-bonded panel on the platform of the COF pre-press laminator with the cover plate of the initial panel facing upwards. The COF pre-press laminator completes the pre-press lamination. In the first 50 seconds of pre-press lamination, the light-bonded panel expels gas or air bubbles through the capillary exhaust channel. After pre-press lamination, the LOCA semi-cured particles on the upper and lower surfaces of the SCA solid film are deformed under pressure and connected to form a LOCA film layer with a thickness of 6-8μm. The LOCA semi-cured particles and the formed capillary exhaust channel disappear, and the pre-bonded panel is obtained. After pre-pressing by the COF pre-pressing laminator, the central area of ​​each LOCA semi-cured particle in the LOCA film layer has local LOCA liquid optical adhesive penetrating into the SCA solid film to a depth of 0.5-1μm below the surface, or penetrating into the cover plate to a depth of 0.5-1μm below the surface. In the subsequent UV cold light curing process, it is completely cured into one piece without the formation of material interfaces, and no new light refractive interfaces that cause changes in the light refractive index are formed. For the degassing step, modify the degassing parameters of the degassing machine, setting the degassing pressure to 0.35-0.45 MPa, the degassing temperature to 68-73℃, and the degassing time to 30-35 minutes. Place each pre-bonded panel into a corresponding degassing fixture, then arrange multiple degassing fixtures neatly on the plate inside the degassing machine, close the lid of the degassing machine, check and confirm that the lid of the degassing machine is closed, start the degassing machine to perform degassing treatment, and obtain a semi-finished panel. The inspection process involves checking the semi-finished panels for any abnormalities or defects. Semi-finished panels that pass inspection and show no abnormalities or defects are marked as properly bonded. These properly bonded panels are then directly transferred to the next process, an LED cold light source UV machine, for UV cold light curing. After undergoing the UV cold light curing step... Semi-finished panels that show abnormalities or defects during inspection are marked as defective products, and the corresponding reasons for the abnormalities are marked. Defective products are then sent to the re-disassembly station for re-disassembly processing and the re-disassembly steps are performed. UV cold light curing step, The production time of the semi-finished panels is controlled within 0.5 hours, and the produced semi-finished panels undergo inspection within 0.2-6 hours before being sent to the LED cold light source UV machine for UV cold light curing treatment. Set the operating conditions of the LED cold light source in the LED cold light source UV machine, and set its UV irradiation energy to 4500-5000 MJ / cm². 2 The conveyor belt speed is set to 3.5-4.5 meters per minute. The laminated product is transferred to the belt of the LED cold light source UV machine. The SENSOR functional sheet of the laminated product is placed on the cold light source belt with the SENSOR functional sheet facing upward. The laminated product is conveyed by the belt through the LED cold light source of the LED cold light source UV machine, so that the cover plate, SCA solid film and SENSOR functional sheet are solidified into one piece. Once the steps are completed and the product has cured, it will be transferred to the next process after passing inspection. The re-disassembly step involves receiving defective products returned during the inspection step at the re-disassembly station. For defective products marked as having only surface dirt during the inspection process, the cover plate and sensor sheet of the defective product are first cleaned with a lint-free surface dampened with an appropriate amount of petroleum ether. After cleaning and passing inspection, these products are returned as good products to the LED cold light source UV machine for UV cold light curing. For defective products marked as having abnormal bonding layers during the inspection process, a small amount of ethanol is injected into the bonding interface between the cover plate and the sensor sheet using a syringe. This fills the bonding interfaces between the cover plate and the solid adhesive, as well as between the sensor sheet and the solid adhesive, with ethanol, forming a liquid ethanol isolation layer. The cover plate and sensor sheet are then separated and cleaned. After cleaning, the cover plate and sensor sheet from the defective product are recovered. Finally, the recovered cover plate and sensor sheet are transferred to the solid adhesive bonding station to perform the solid adhesive bonding step for the sensor sheet. The cover plate and sensor sheet from the defective products are recycled and reused.

2. The full lamination process for an easily reversible touch LCD display panel according to claim 1, characterized in that: The bonding interface between the cover plate and the SENSOR functional sheet includes the interface between the cover plate and the SCA solid film, and the interface between the SENSOR functional sheet and the SCA solid film.

3. The full lamination process for an easily reversible touch LCD display panel according to claim 1, characterized in that: In the disassembly step, the defective product is placed in a disassembly fixture. The disassembly fixture seals the front and back sides and the right side of the defective product. Ethanol liquid is injected through the injection port on the right side of the disassembly fixture at a pressure of 0.3-0.4 MPa. The ethanol liquid is then forced into the bonding interface between the cover plate and the SENSOR functional piece through a liquid guide groove connected to the injection port, forming the liquid ethanol isolation layer at the bonding interface. Excess ethanol liquid is discharged through the drain port on the right side of the disassembly fixture.

4. The full lamination process for an easily reversible touch LCD display panel according to claim 3, characterized in that: In the disassembly step, after ethanol liquid is discharged from the drain port, the drain port is sealed with a plug, the injection pressure of the ethanol liquid is increased by 0.5-0.6 MPa and maintained for 3-5 seconds, and the thickness of the formed liquid ethanol isolation layer is increased to 200-300 μm.

5. The full lamination process for an easily reversible touch LCD display panel according to any one of claims 1 to 4, characterized in that: In the step of applying solid adhesive to the SENSOR functional sheet, the SCA solid film is processed from an SCA adhesive film with a thickness of 600μm. The height of the LOCA semi-cured particles is 21-23μm, the average width is 41-49μm, the average spacing between two adjacent LOCA semi-cured particles is 81-89μm, and the refractive index of the SCA solid film relative to glass is 1.4847.

6. The full lamination process for an easily reversible touch LCD display panel according to claim 5, characterized in that: Multiple horizontally placed SCA solid films are continuously conveyed forward by a first conveyor belt at a speed of 3.5-4.5 meters per minute. A row of nano-spray nozzles is positioned above the first conveyor belt, each spraying LOCA liquid optical adhesive downwards, creating a mist of LOCA liquid optical adhesive particles. This forms a nano-mist band between the nozzles and the conveyor belt, slowly descending towards the conveyor belt and filled with evenly distributed LOCA liquid optical adhesive particles. The width of the nano-mist band is greater than the width of the SCA solid films. After the SCA solid films are conveyed through the nano-mist band, relatively evenly distributed LOCA liquid optical adhesive droplets adhere to the surface of the films before they are transferred to a second conveyor belt. The conveying speed of the second conveyor belt is set to 6-7 cm / s. Only one UV curing lamp is installed above the second conveyor belt, and the UV irradiation energy of the UV curing lamp is set to 100-200 MJ / cm². 2 The second conveyor SCA solid film passes quickly from below the UV curing lamp. The total irradiation time of any LOCA liquid optical adhesive mist bead by the UV curing lamp is less than 1.5 seconds. The LOCA liquid optical adhesive mist bead cannot be cured due to insufficient UV irradiation energy and insufficient irradiation time, thus forming the UV micro-curing process. The UV micro-curing process cures only 25-35% of the LOCA liquid optical adhesive mist bead according to its volume ratio.

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