Method for improving bubbles in g-structure touch screen process

Abstract

This application relates to the field of touch display technology, specifically disclosing a method for improving air bubbles in the manufacturing process of a G-structure touch screen, including the following steps: Step 1: Applying adhesive to a flexible cover plate; Step 2: Sending the cover plate with adhesive to a debubbling machine to eliminate air bubbles; Step 3: Bonding the screen to the adhesive, so that the screen and cover plate are bonded; Step 4: Sending the assembled assembly of the screen and cover plate to a debubbling machine to eliminate air bubbles; Step 5: Applying a back protective film; Step 6: Curing the assembly with UV irradiation. The purpose of this patent is to solve the problem that air bubbles easily form after a flexible cover plate and a rigid glass plate are bonded and left to stand during the manufacturing of touch displays.

Description

Technical Field

[0001] This invention relates to the field of touch display technology, and in particular to a method for improving air bubbles in the manufacturing process of G-structure touch screens. Background Technology

[0002] A touch screen is a display and touch device that integrates a display screen and touch control. It is widely used in human-computer interaction applications. In recent years, with the increasing use of mobile phones, more and more smart products have adopted touch screens as their display and touch devices.

[0003] Full lamination is currently the most widely used bonding method for displays and touchscreens. Its advantages include a seamless seal, reduced dust accumulation, and significantly better display quality compared to other bonding methods. Therefore, fully laminated touchscreen displays are currently the most common on the market. In the current production process, the display and touch layer are fully laminated together to form the touch display layer. Finally, a glass plate is laminated to the touch display layer. Usually, a cover plate is added to the glass plate to protect the screen. When a soft cover plate is used to laminate with a hard glass plate, small air bubbles rebound in the visible area at the edge of the touchscreen after 8 hours of defoaming and settling, affecting the yield rate of the finished product. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical problem solved by this invention is to provide a method for improving air bubbles in the manufacturing process of G-structure touch screens, thereby solving the problem that air bubbles easily form when the soft cover plate and the hard glass plate are bonded together and left to stand during the processing of existing touch screens.

[0005] To solve the above problems, the technical solution adopted by the present invention is: a method for improving air bubbles in the manufacturing process of a G-structure touch screen, comprising the following steps: Step 1: applying adhesive to a soft cover plate; Step 2: sending the cover plate with adhesive to a debubbling machine to eliminate air bubbles; Step 3: bonding the screen to the adhesive, so that the screen and the cover plate are bonded; Step 4: sending the assembly after the screen and cover plate are bonded to a debubbling machine to eliminate air bubbles; Step 5: applying a back protective film; Step 6: curing the assembly by UV irradiation.

[0006] The technical principle and beneficial effects of this solution are as follows: By performing a first defoaming process on the adhesive and cover plate respectively, the adhesion between the cover plate and the adhesive is improved, reducing the difficulty of defoaming in subsequent processes. A second defoaming process is performed after the cover plate adhesive and screen are bonded together, ensuring that the cover plate and screen are tightly bonded together by the adhesive. The two defoaming processes strengthen the bonding strength between the cover plate, screen, and adhesive. Finally, UV light irradiation cures the adhesive, which in turn firmly fixes and bonds the cover plate and screen together. After the bonded product is left to stand for 48 hours, no bubbles are generated, effectively reducing the defect rate of the finished product.

[0007] Furthermore, the adhesive used in step 1 is double-sided OCA optical adhesive, with release films attached to both adhesive surfaces. OCA optical adhesive is colorless and transparent, has a light transmittance of over 95%, good bonding strength, can cure at room temperature or medium temperature, and exhibits low curing shrinkage; the two release films facilitate the separate bonding of different components.

[0008] Furthermore, the cover plate is made of PET. Compared to rigid glass cover plates, using PET cover plates can effectively save raw materials and reduce screen production costs; at the same time, PET cover plates are less prone to breakage.

[0009] Furthermore, in both steps 1 and 3, a positioning device is used to position the components to be bonded. Positioning the flexible cover plate to the screen using the positioning device facilitates alignment and bonding, reducing bonding errors.

[0010] Furthermore, after the cover plate and adhesive are positioned, a rolling process is used to bond the adhesive to the cover plate. Rolling compacts the adhesive to the cover plate and reduces air bubbles between them, achieving a preliminary de-bubbling effect.

[0011] Furthermore, in step 5, the assembly is wiped and its appearance is inspected before applying the back protective film. This pre-application inspection allows for timely rework of any appearance issues, thereby reducing the defect rate of the finished product.

[0012] Furthermore, the positioning device includes a worktable, a positioning component mounted on the worktable, and a pushing component for pushing the display screen. The positioning component includes a baffle arranged along the movement direction of the pushing component and a limiting plate perpendicular to the baffle. The limiting plate and the baffle are rotatably connected along a horizontal plane. A rotating rod is rotatably connected to the baffle along a vertical plane. A limiting block is fixedly connected to the rotating shaft of the rotating rod, and the limiting block limits the limiting plate. A pressure roller is detachably connected to one end of the rotating rod. A film-tearing rod is connected to the side wall of the baffle, and the film-tearing rod is arranged parallel to the pressure roller. The pushing component includes a push plate and a drive rod connected to the push plate.

[0013] The positioning component limits one end of the component to be bonded, thus ensuring precise positioning between the components. After positioning, the pressure roller flips downward to press down the adhesive or cover plate, and the push plate abuts against the other end of the component to be bonded. When the pressure roller rotates, it drives the rotating rod to rotate, which in turn drives the limiting block to rotate from the horizontal plane to the vertical plane through the rotating rod's shaft. This prevents the limiting block from limiting the limiting plate. The release film on one side of the adhesive is peeled off and fixed on the film-peeling rod. The pushing component is then activated, pushing the screen towards the positioning component. At this time, the pressure roller bonds the adhesive to the screen. Since one side of the release film is fixed on the film-peeling rod, the release film is peeled off when the screen is pushed. Because the film-peeling rod is located in front of the pressure roller, the release film can be peeled off before the pressure roller compacts the adhesive film, achieving simultaneous film application and peeling. This solves the problem of positioning accuracy being affected by manual film peeling, and simultaneous film application and peeling reduces the error of manual film application.

[0014] Furthermore, an adsorption assembly is provided below the horizontal plane of the workbench. The baffle includes a fixed plate and a sliding plate that can slide in the left-right direction as shown in the figure. The limiting block and the rotating rod are both connected to the sliding plate. The adsorption assembly includes a slider fixed at the lower end of the sliding plate. The slider is embedded in the first horizontal groove with an upward opening in the workbench. The left end of the slider is connected to a push rod, which is set in the sliding track of the work platform in the horizontal direction. The right end of the slider is fixed with a connecting rod set in the horizontal direction. A negative pressure chamber is opened in the workbench. The negative pressure chamber is located between the two positioning assemblies. A perforated plate is provided above the negative pressure chamber. The perforated plate is at the same height as the plane of the workbench. When the positioning assembly positions the workpiece to be bonded, the workpiece to be bonded is exactly located on the perforated plate. The perforated plate only has through holes in the area that can be covered by the bonding. An air plate is provided in the negative pressure chamber in the vertical direction. The upper end of the air plate extends upward to the horizontal groove and is connected to the connecting rod. The upper end of the air plate slides along the second horizontal groove with a downward opening in the workbench. A sealing ring is provided at the connection between the first horizontal groove and the second horizontal groove. One end of the connecting rod passes through the sealing ring and is fixedly connected to one side of the air plate.

[0015] The activation of the push rod causes the push plate to contact the left side of the screen. As the slide plate moves, the connecting rod pushes the air plate to move, thereby increasing the negative pressure chamber under the perforated plate. Since the screen covers the through holes of the perforated plate, the gas in the negative pressure chamber remains unchanged, while the space increases, thus creating negative pressure. This allows the cover plate or screen to be firmly attached to the perforated plate, preventing the cover plate or screen from shifting due to the rolling bonding mechanism when the film is peeled off by the film peeling rod and when the film is pressed by the pressure roller.

[0016] Furthermore, the film-tearing rod is rotatably connected to the baffle, and a film-tearing roller is fixedly connected to the film-tearing rod, with a film-embedding groove on the film-tearing roller; the push plate is fixedly connected to a rack, which is arranged along the direction of movement of the pushing component, and one end of the film-tearing rod extends out of the baffle and is fixedly connected to a gear that meshes with the rack.

[0017] The rack and gear mesh together, so that the rack can drive the gear to rotate when it moves. When the component is pushed to move, it drives the rack to move, which in turn drives the gear to rotate. This causes the film-tearing rod to drive the film-tearing roller to rotate, so that the release film is wound onto the film-tearing roller, thus avoiding affecting the bonding of the component by the film-applying roller.

[0018] Furthermore, both the baffle and the push plate have vertical grooves, and an adjustment structure is provided in the grooves. The adjustment structure includes a vertically arranged lead screw and a slider threadedly connected to the lead screw. One end of the slider is fixed with a connecting rod. The film-tearing rod is rotatably connected to the connecting rod of the adjustment mechanism in the baffle, and the rack is fixedly connected to the connecting rod of the adjustment mechanism in the push plate.

[0019] The height of the slider is adjusted by rotating the lead screw, and the height of the connecting rod is adjusted by adjusting the height of the slider, thereby adjusting the height of the film-peeling rod and the rack to accommodate screens of different thicknesses. Attached Figure Description

[0020] Figure 1 This is a flowchart of the method of the present invention.

[0021] Figure 2 This is a top view of the positioning device in the embodiment.

[0022] Figure 3 This is a schematic diagram illustrating the film removal process for this solution.

[0023] Figure 4 This is a schematic diagram of Embodiment 2 of this solution.

[0024] Figure 5 for Figure 3 Enlarged view of section A in the middle.

[0025] Figure 6 for Figure 3 Enlarged view of section B.

[0026] Figure 7 for Figure 4 Enlarged view of section C. Detailed Implementation

[0027] The following detailed description illustrates the specific implementation method:

[0028] The reference numerals in the accompanying drawings include: positioning assembly 1, baffle 11, slide plate 111, fixing plate 112, limiting plate 12, pressure roller 13, rotating rod 131, limiting block 132, film tearing rod 14, film tearing roller 141, gear 142, pushing assembly 2, driving rod 21, push plate 22, rack 23, first lead screw 3, first slider 31, first connecting rod 32, second connecting rod 33, worktable 4, pushing rod 41, horizontal slider 411, connecting rod 42, air plate 43, perforated plate 44, sealing ring 45, first horizontal slide groove 46, second horizontal slide groove 47, negative pressure chamber 48, screen 5, adhesive 6, release film 7, cover plate 8.

[0029] Example 1 is as attached. Figure 1 The following is a method for improving air bubbles in the manufacturing process of a G-structure touchscreen: Step 1: Positioning a flexible cover plate and adhesive 6 using a positioning device. Adhesive 6 is applied to the flexible cover plate 8. The adhesive 6 can be double-sided OCA optical adhesive or double-sided TOCA optical adhesive. Step 2: Sending the cover plate 8 with adhesive 6 to a debubbling machine to eliminate air bubbles. Step 3: Positioning the flexible cover plate 8 with adhesive 6 and the screen 5 using a positioning device, bonding the screen 5 to the adhesive 6, so that the screen 5 and the cover plate 8 are bonded. Step 4: Sending the assembly after bonding the screen 5 and the cover plate 8 to a debubbling machine to eliminate air bubbles. Step 5: Wiping and inspecting the appearance of the assembly. After confirming that there are no errors, applying a back protective film. Step 6: Curing the assembly with UV irradiation. Step 7: Performing functional testing on the laminated display. Step 8: Applying protective films to both sides of the product that has passed the functional testing. Step 9: Packaging and shipping the finished product.

[0030] By performing a first defoaming process on the adhesive 6 and the cover plate 8, the adhesion between the cover plate 8 and the adhesive 6 is improved, reducing the difficulty of subsequent defoaming processes. A second defoaming process is performed after the cover plate 8, adhesive 6, and screen 5 are bonded together tightly via the adhesive 6. These two defoaming processes strengthen the bonding strength between the cover plate 8, screen 5, and adhesive 6. Finally, UV light irradiation cures the adhesive 6, ensuring a firm bond between the cover plate 8 and screen 5. After 48 hours of settling, no bubbles are generated, effectively reducing the defect rate. The flexible cover plate 8, made of PET, effectively saves raw materials compared to rigid glass cover plates 8, reducing the production cost of the screen 5. Furthermore, the PET cover plate 8 is less prone to breakage.

[0031] The positioning device for bonding the flexible cover plate 8 and the display screen 5 is attached. Figure 2As shown, the positioning device includes a worktable 4, positioning components 1 arranged sequentially from left to right on the worktable 4, and an abutment component for limiting one end of the display screen. The positioning component 1 is connected to a rolling bonding component, and an adsorption component is also provided below the horizontal plane of the worktable 4. Two sets of positioning components 1 are symmetrically arranged along the horizontal centerline of the screen 5. The positioning component 1 includes a baffle 11 arranged horizontally, a limiting plate 12 arranged vertically on both sides of the display screen, and an adsorption mechanism. (Refer to...) Figure 2 The limiting plate 12 and the baffle 11 are rotatably connected along the horizontal plane. A torsion spring is sleeved at the pivot of the rotatable connection, which causes the limiting plate 12 to rotate to the right. The baffle 11 includes a fixed plate 112 and a sliding plate 111 that can slide in the left and right direction as shown in the figure. The adsorption assembly includes a horizontal slider 411 fixed to the lower end of the sliding plate 111 by screws. The horizontal slider 411 is embedded in the first horizontal groove 46 with an upward opening opened in the worktable 4. A push rod 41 is bolted to the left end of the slider. The push rod 41 is set in the sliding track opened in the worktable in the horizontal direction. A connecting rod 42 is bolted to the right end of the slider in the horizontal direction.

[0032] A negative pressure chamber 48 is provided inside the worktable 4, which is located between two positioning components 1. A perforated plate 44 is provided above the negative pressure chamber 48, and the perforated plate 44 is at the same height as the plane of the worktable 4. A first horizontal slide 46 is located outside the perforated plate 44 and does not contact the perforated plate 44. When the positioning component 1 positions the part to be bonded, the part to be bonded is positioned exactly on the perforated plate 44. The perforated plate 44 only has through holes in the area that the screen 5 can cover. An air plate 43 is provided in the negative pressure chamber 48 along the vertical direction. The upper end of the air plate 43 extends upward to the horizontal slide and is connected to the connecting rod 42. The upper end of the air plate 43 slides along the downward-opening second horizontal slide 47 opened in the worktable 4. A sealing ring 45 is provided at the connection between the first horizontal slide 46 and the second horizontal slide 47. One end of the connecting rod 42 passes through the sealing ring 45 and is fixed to the air plate 43 by bolts.

[0033] The rolling bonding mechanism includes a rotating rod 131 rotatably connected to the slide plate 111 along a vertical plane. An L-shaped limiting block 132 is bonded to the rotating shaft of the rotating rod 131. One end of the limiting block 132 extends to the rotating rod 131, allowing the inner wall of the short side of the L-shaped limiting block 132 to contact the limiting plate 12 when the angle between the limiting plate 12 and the baffle 11 is 90 degrees, thereby limiting the limiting plate 12. A pressure roller 13 is bolted to one end of the rotating rod 131. A film-tearing rod 14 is connected to the right side wall of the slide plate 111. The film-tearing rod 14 is parallel to the pressure roller 13. The pressure roller is used to crush and expel air bubbles from the bonding surface during adhesive bonding, and the film-tearing rod is used to roll up the release film. Figure 3As shown, when applying film from left to right, when the pressure roller 13 rotates and presses down, the pressure roller 13 is located to the left of the film-tearing rod 14; a film-tearing roller 141 is fixedly connected to the film-tearing rod 14, and the film-tearing roller 141 has a film-embedding groove; a rack 23 is fixedly connected to the push plate 22, and the rack 23 is set along the movement direction of the push assembly 2; one end of the film-tearing rod 14 extends out of the baffle 11 and is fixedly connected to the gear 142 that meshes with the rack 23; the abutment assembly includes the push plate 22 and the drive rod 21 connected to the push plate 22, and the push rod 41 or the drive rod 21 can be a cylinder or a hydraulic cylinder.

[0034] Method 1: As shown in the following example Figure 3 As shown, when the screen 5 and the cover plate 8 are bonded together, the initial position of the pressure roller 13 is above the baffle 11. The screen 5 and the cover plate 8 with the adhesive 6 are placed on the positioning component 1. The screen 5 presses against the limiting plate 12, causing the limiting plate 12 to rotate to the left and be stopped at the limiting block 132. The drive rod 21 is activated so that the push plate 22 presses against the left side of the screen 5. Then, the baffle 11 and the limiting plate 12 of the positioning component 1, and the push plate 22 of the pushing component 2, press against the screen 5 and the cover plate with the adhesive 6. The plate 8 is positioned to limit the screen 5, thereby aligning it with the cover plate 8. At this time, because the limiting block 132 limits the limiting plate 12, the limiting plate 12 will not flip outwards under the external force of the screen 5, thus firmly holding the component to be bonded. During bonding, the release film 7 on one side of the adhesive 6 is torn off and the torn release film 7 is inserted into the film-inserting groove of the film-tearing roller 141 for fixation. When bonding begins, the pressure roller 13 located above the pressure plate is flipped downwards and pressed onto the cover plate 8. Simultaneously, the limiting block 132 rotates with the pressure roller 13, thus preventing... Next, the limiting plate is positioned; then, the push rod 41 is activated, pushing the slider to the right, which in turn drives the slide plate 111 to slide. Because one side of the adhesive film is already in the positioning state and attached to the screen 5, the relative position of the adhesive 6 and the screen 5 will not change during the pushing process, that is, the relative position of the cover plate 8 and the screen 5 will not change; when sliding, the slide plate 111 moves and pushes the air plate 43 to move through the connecting rod, thereby increasing the negative pressure chamber 48 under the perforated plate 44. Since the screen 5 blocks the passage of the perforated plate 44... With the hole covered, the gas inside the negative pressure chamber 48 remains unchanged, while the space increases, thus creating negative pressure. This causes the screen 5 to be adsorbed onto the perforated plate 44. The sliding plate 111 moves, causing the pressure roller 13 and the film-tearing rod 14 on the sliding plate 111 to move to the right. During the movement to the right, the gear 142 meshes with the rack 23, causing the gear 142 to rotate along the path of the gear 142. This causes the film-tearing rod 14 to drive the film-tearing roller 141 to rotate, thereby causing the release film 7 to be wound onto the film-tearing roller 141, avoiding affecting the bonding of the pressure roller 13 to the components.

[0035] Method 2: The difference from Method 1 is that when using it to bond the adhesive 6 to the cover plate 8, the pressure roller 13 is initially positioned above the baffle 11. The cover plate 8 is placed on the perforated plate 44 so that the cover plate 8 covers the through holes of the perforated plate 44. The adhesive 6 is placed on the cover plate 8. The push rod 41 is activated so that the push plate 22 touches the left side of the screen 5. When the slide plate 111 moves, the air plate 43 is moved by the connecting rod, thereby increasing the negative pressure chamber 48 under the perforated plate 44. Since the screen 5 covers the through holes of the perforated plate 44, the negative pressure chamber 48... The internal gas remains unchanged, but the space increases, thus creating negative pressure. Because the cover plate 8 is soft and lightweight, it can be firmly adsorbed onto the perforated plate 44, so that the cover plate 8 does not shift due to the action of the rolling bonding mechanism when the film tearing rod 14 tears the film and the pressure roller 13 presses the film. At the same time, before the slide plate 111 moves to the right stop, the push plate 22 is activated to return to its original position. Because the thickness of the cover plate 8 is less than the height of the push plate 22, if it does not return to its original position, it will cause interference when the rolling bonding assembly moves to the end of the cover plate 8, and it will not be able to be completely torn off. The remaining operations are basically the same as those in the first usage method.

[0036] Method 3: The difference from Method 1 is that when attaching screen 5 and cover plate 8, the sliding plate 111 is no longer pushed. Instead, the drive rod 21 continues to push the push plate 22 to the left, thus pushing screen 5 and cover plate 8 to move to the left together. Since the limiting block 132 no longer limits the limiting plate 12, screen 5 and cover plate 8 push the limiting plate 12 away and continue to move to the left. Because one side of the adhesive film is already attached to screen 5 in the positioning state, the relative position of adhesive 6 and screen 5 will not change during the pushing process, i.e., the relative position of cover plate 8 and screen 5. The position will not change; during pushing, the push plate 22 moves, driving the rack 23 to move, which in turn causes the gear 142 to rotate, thereby causing the film-tearing rod 14 to drive the film-tearing roller 141 to rotate, so that the release film 7 is wound onto the film-tearing roller 141, avoiding affecting the bonding of the film roller to the components; the pushing component 2 pushes the screen 5 and cover plate 8 to the left to move until they are separated from the pressure roller 13, thus completing the film application process; the torn release film 7 is also wound onto the film-tearing roller 141, and the release film 7 on the film-tearing roller 141 can be removed; and the pressure roller 13 and the driving component are reset, waiting for the next positioning and film application.

[0037] Example 2 is basically as follows Figure 7 As shown, the difference from Embodiment 1 is that an adjustment mechanism is also provided. Both the baffle 11 and the push plate 22 have vertical grooves in the vertical direction. The baffle 11 and the push plate 22 are respectively provided with a first adjustment structure and a second adjustment structure in the grooves. The first adjustment structure includes a first lead screw 3 arranged vertically and a first slider 31 threadedly connected to the first lead screw 3. One end of the first slider 31 is fixed with a first connecting rod 32. The first connecting rod 32 is arranged horizontally and extends to the right beyond the baffle 11. The film-tearing rod 14 is rotatably connected to one end of the first connecting rod 32. Figure 3As shown, when the pressure roller 13 flips to the side of the film-tearing rod 14, the film-tearing rod 14 is located to the right of the pressure roller 13; the first connecting rod 32 of the film-tearing rod 14 is rotatably connected; the second adjustment mechanism includes a second lead screw arranged vertically and a second slider threadedly connected to the second lead screw, one end of the second slider is fixed with a second connecting rod 33, the second connecting rod 33 is arranged vertically and extends out of the push plate 22, and the rack 23 is fixedly connected to the second connecting rod 33 with screws.

[0038] When the first lead screw 3 is rotated, the first slider 31 is limited by the first connecting rod 32, so the first slider 31 will not rotate with the first lead screw 3, and thus slides up and down along the first lead screw 3, thereby driving the first connecting rod 32 and the film-tearing rod 14 connected to the first connecting rod 32 to move up and down; when the first lead screw 3 is rotated clockwise, the first slider 31 slides upward, and when the first lead screw 3 is rotated counterclockwise, the first slider 31 slides downward.

[0039] The height of the first slider 31 can be adjusted by rotating the first lead screw 3, and the height of the first connecting rod 32 can be adjusted by adjusting the height of the first slider 31, thereby adjusting the height of the film-peeling rod 14. Similarly, the height of the rack 23 can be adjusted by adjusting the second lead screw to adapt to screens 5 of different thicknesses.

[0040] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for improving bubbles in a G-structure touch screen process, comprising: The process includes the following steps: Step 1: Apply adhesive to a flexible PET cover plate; Step 2: Place the cover plate with adhesive into a debubbling machine to remove air bubbles; Step 3: Position the flexible cover plate with adhesive and the screen using a positioning device, and then adhere the screen to the adhesive to ensure a proper fit between the screen and the cover plate; Step 4: Place the assembled assembly (screen and cover plate) into a debubbling machine to remove air bubbles; Step 5: Apply a protective film to the back; Step 6: Cur the assembly using UV irradiation. ​ The positioning device includes a worktable, a positioning component disposed on the worktable, and a pushing component for pushing the display screen. The pushing component includes a push plate and a drive rod connected to the push plate. The positioning component includes a baffle disposed along the movement direction of the pushing component and a limiting plate perpendicular to the baffle. The limiting plate and the baffle are rotatably connected along a horizontal plane. The baffle is rotatably connected to a rotating rod along a vertical plane. One end of the rotating rod is detachably connected to a pressure roller. A film-tearing rod is connected to the side wall of the baffle. The film-tearing rod is disposed parallel to the pressure roller. Below the horizontal plane of the workbench, there is an adsorption assembly. The baffle includes a fixed plate and a sliding plate that can slide in the left and right directions. The adsorption assembly includes a slider fixed at the lower end of the sliding plate. The slider is embedded in a first horizontal groove with an upward opening in the workbench. A push rod is connected to the left end of the slider. The push rod is set in a sliding track in the workbench in the horizontal direction. A connecting rod is fixed to the right end of the slider in the horizontal direction. A negative pressure chamber is opened in the workbench. The negative pressure chamber is located between two positioning assemblies. A perforated plate is provided above the negative pressure chamber. The perforated plate is at the same height as the plane of the workbench. When the positioning assembly positions the workpiece to be bonded, the workpiece to be bonded is exactly located on the perforated plate. The perforated plate only has through holes in the area that can be covered by the bonding. An air plate is provided in the negative pressure chamber in the vertical direction. The upper end of the air plate extends upward to the horizontal groove and is connected to the connecting rod. The upper end of the air plate slides along a second horizontal groove with a downward opening in the workbench. A sealing ring is provided at the connection between the first horizontal groove and the second horizontal groove. One end of the connecting rod passes through the sealing ring and is fixedly connected to one side of the air plate. The film-tearing rod is rotatably connected to the baffle, and a film-tearing roller is fixedly connected to the film-tearing rod. The film-tearing roller has a film-embedding groove. The push plate is fixedly connected to a rack, which is arranged along the direction of movement of the push assembly. One end of the film-tearing rod extends out of the baffle and is fixedly connected to a gear that meshes with the rack.

2. The method of claim 1, wherein the G-structure touch screen process improvement bubble is characterized by: The adhesive used in step 1 is double-sided OCA optical adhesive, with a release film attached to both adhesive surfaces of the OCA adhesive.

3. The method of claim 1, wherein the G-structure touch screen process improvement bubble is characterized by: After the cover plate and adhesive are positioned, the adhesive is rolled to bond the cover plate to the cover plate.

4. The method of claim 1, wherein the G-structure touch screen process improvement bubble is characterized by: Step 5 involves wiping the assembly and inspecting its appearance before applying the back protective film.

5. The method of claim 1, wherein the G-structure touch screen process improvement bubble is characterized by: The rotating shaft of the rotating rod is fixedly connected to a limit block, which limits the position of the limit plate; the pushing assembly includes a push plate and a drive rod connected to the push plate.

6. The method of claim 5, wherein the G-structure touch screen process improvement bubble is characterized by: Both the baffle and the push plate have vertical grooves along the vertical direction. An adjustment structure is provided in the vertical groove. The adjustment structure includes a lead screw arranged vertically and a slider threadedly connected to the lead screw. A connecting rod is fixed to one end of the slider. The film-tearing rod is rotatably connected to the connecting rod of the adjustment mechanism in the baffle, and the rack is fixedly connected to the connecting rod of the adjustment mechanism in the push plate.

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