Laminating device and laminating process for large-size display screen and touch screen

Abstract

The device comprises a base, a mounting frame, a first motor, a lead screw, a guide rod and a first sliding block, an assembling seat, a double-thread lead screw and a second sliding block are arranged on an assembling plate, a transverse rod and a transmission frame are arranged in a [-shaped frame, and a pressing roller is arranged on the inner side of a side plate; the process comprises the steps of equipment preparation, placement of a fitting object, preliminary positioning of fitting, transverse fitting and synchronous vibration fitting. According to the laminating device for the large-size display screen and the touch screen and the laminating process of the laminating device, a first motor drives a lead screw to rotate, a second motor drives a second gear to rotate, and a third motor drives a rotating disc and a transmission rod to rotate in sequence, so that a press roller vibrates synchronously during transverse laminating movement, and therefore impact force can be generated on large bubbles, and the laminating effect is improved. Therefore, the laminating quality is further improved, the possibility that bubbles remain in the laminated screen is reduced, and the pressure can be more uniformly distributed on the surface of the touch screen through the vibrating pressing roller.

Description

Technical Field

[0001] The present invention relates to the field of display screen production and application, and in particular to a laminating device and a laminating process for a large-size display screen and a touch screen. Background Art

[0002] With the development of display technology, display screens, as a simple, convenient and natural human-computer interaction device, have been widely used in various fields such as mobile phones, new energy vehicle navigation systems, industrial control, medical treatment, self-service terminals, etc., which greatly facilitates users, especially elderly users, and thus brings a new user experience. In the production of display screens, a bonding device is required to bond the display screen and the touch screen.

[0003] Common bonding devices include a bottom plate, a column, a top plate, a controller, a downward pressing servo electric cylinder, a lifting horizontal plate, an end side plate, a bonding plate, a support table, a facing pressing mechanism, an end supporting mechanism, etc. During the bonding operation, the downward pressing servo electric cylinder drives the lifting horizontal plate and the bonding plate to move up and down to achieve the bonding action between the touch screen and the LCD screen. The facing pressing mechanism rolls from the middle section of the touch screen to both ends, so that the touch screen and the LCD screen are slowly bonded and the air is discharged.

[0004] However, in this method, since the pressure roller only performs horizontal pressing, the bubble discharge path is limited by rolling in a single direction, and large bubbles are difficult to be completely discharged. Small bubbles may also be trapped between the touch screen and the liquid crystal display, thereby reducing the qualified rate of the product. In addition, during rolling and bonding, the pressure in a single direction causes stress to be concentrated on the edge of the screen or certain local areas, increasing the risk of touch screen rupture or damage to the liquid crystal layer of the liquid crystal display, reducing the qualified rate of the product, and failing to meet the working requirements of display production. Therefore, a bonding device and bonding process for a large-size display screen and a touch screen are proposed. Summary of the invention

[0005] The present invention provides the following technical solution: a laminating device for a large-size display screen and a touch screen, comprising a base, the front and rear sides of the base are connected to mounting frames, and the interior of the mounting frames are hollow structures, a first motor is mounted on the top of the rear mounting frame through a tripod, and the rotor of the first motor passes through the interior of the mounting frame, a lead screw is coaxially connected to the bottom end of the rotor of the first motor, a guide rod is inserted into the interior of the front mounting frame, and a first slider is sleeved on the outside of the lead screw and the guide rod; The assembly plate is connected to the inner side of the first slider. In the middle of the upper surface of the assembly plate, an assembly seat is installed, and the interior of the assembly seat is of a hollow structure. A double-threaded lead screw is inserted into the interior of the assembly seat through a bearing. On both outer sides of the double-threaded lead screw, second sliders are screwed. The left end of the double-threaded lead screw penetrates through the corresponding position of the assembly seat, and the left end of the double-threaded lead screw is coaxially connected to a first gear. At the position behind the assembly seat on the upper part of the assembly plate, a second motor is installed. The rotor of the second motor is coaxially connected to a second gear. Through slots are opened at the bottom of the assembly seat and in the middle position inside the assembly plate; The connecting frame is installed at the bottom of the second slider. The bottom of the connecting frame is connected to a U-shaped frame. On the outer side of the U-shaped frame, a third motor is installed through a leg. The rotor of the third motor penetrates through the corresponding position inside the U-shaped frame. Cross bars are inserted into the interior of the U-shaped frame, and the inner ends of the cross bars are all connected to a transmission frame; The turntable is coaxially connected to the outer end of the rotor of the third motor. Transmission rods are connected to both the inner and outer sides of the turntable, and the transmission rods are inserted into the interior of the transmission frame. The outer ends of the cross bars are all connected to side plates, and pressing rollers are installed on the inner sides of the side plates.

[0006] The present invention provides a bonding process for a large-size display screen and a touch screen according to the bonding device for a large-size display screen and a touch screen, including the following steps: S1 Equipment preparation: Use the above-mentioned bonding device for a large-size display screen and a touch screen, where the first motor, the second motor, and the third motor are in a standby state for startup, the assembly plate is in the initial position, and the pressing roller is in the initial state; S2 Placement of the bonding object: Place the touch screen and the liquid crystal display screen to be bonded on the bonding working area on the surface of the base. This area is located below the pressing roller and can be contacted by the pressing roller; S3 Preliminary positioning of bonding: First, apply glue to the screen surface through a glue dispenser, and then start the first motor. The rotor of the first motor drives the lead screw to rotate. Due to the screwing relationship between the lead screw and the first slider and the guiding effect of the guiding rod on the first slider, the first slider drives the assembly plate to move downward until the pressing roller installed at the lower part of the assembly plate reaches a predetermined position close to the surfaces of the touch screen and the liquid crystal display screen; S4 Horizontal bonding process: Start the second motor. The rotor of the second motor drives the second gear to rotate. Since the first gear meshes with the second gear, the first gear drives the double-threaded lead screw to rotate. The mutually reverse threads on both outer sides of the double-threaded lead screw cause the second sliders on both sides to move synchronously relatively or away from each other. The connecting frame at the bottom of the second slider drives the pressing roller on the lower side of the U-shaped frame to perform a bonding action from one side of the touch screen and the liquid crystal display screen to the other side; In the S5 synchronous vibration laminating process, while the transverse laminating process is in progress, the third motor is started. The rotor of the third motor drives the turntable to rotate. During the rotation of the turntable, the transmission rod on the turntable drives the transmission frame to perform reciprocating left and right movements. The transmission frame drives the side plate and the pressure roller inside the side plate through the cross bar to vibrate synchronously during the transverse laminating movement. Through the vibration of the pressure roller, the bubbles in the laminating process are processed, the pressure distribution is optimized, the glue distribution is adjusted, and the stress distribution is improved.

[0007] Preferably, the inner cavities of the mounting frame and the assembly seat and the shapes of the first slider and the second slider are all trapezoidal. The threads on both sides of the double-threaded lead screw are set in opposite directions to each other, and the first gear meshes with the second gear.

[0008] Preferably, the lengths of the cross bars are all greater than the lengths of the U-shaped frames. Flexible scrapers are installed inside the pressure rollers. The bottom ends of the flexible scrapers are flush with the bottom tangent points of the pressure rollers, and the bottom ends of the flexible scrapers are provided with rounded corners.

[0009] Preferably, mounting columns are connected to the four corners of the lower surface of the assembly plate. The interiors of the mounting columns are all hollow structures. Springs are connected to the tops of the inner cavities of the mounting columns. The bottom ends of the springs are connected to discs. Connecting rods are coaxially installed on the lower surfaces of the discs, and the connecting rods all penetrate through the bottoms of the mounting columns. The bottom ends of the connecting rods are connected to edge-sealing pressing plates.

[0010] Preferably, the edge-sealing pressing plates are arranged in a horizontal L shape. The bottom end faces of the connecting rods all extend beyond the lower cutting planes of the pressure rollers. Rubber pads are laid on the bottoms of the edge-sealing pressing plates.

[0011] Preferably, in step S1, pre-detection is performed on the first motor, the second motor, and the third motor. This pre-detection includes checking whether the circuit connections of the motors are normal. By using a professional circuit detection instrument, check whether there are short circuits, open circuits, etc. in the power supply lines and control lines of the motors. At the same time, check the rotors of the motors to see whether the rotors can rotate flexibly and whether there is any jamming phenomenon, so as to avoid the laminating failure phenomenon caused by the jamming of the rotors during laminating.

[0012] Preferably, in step S2, before placing the touch screen and the liquid crystal display screen, it is necessary to clean the touch screen and the liquid crystal display screen with a cleaning reagent and a dust-free cloth to remove the dust and oil stains on the surface, so as to avoid impurities being sandwiched between the touch screen and the liquid crystal display screen during the laminating process, forming defects and affecting the display effect or touch function.

[0013] Preferably, in step S3, the determination of the predetermined position needs to be calculated and adjusted according to the thickness and hardness of the touch screen and the liquid crystal display screen, so as to avoid the pressure roller generating too much pressure on the surfaces of the touch screen and the liquid crystal display screen.

[0014] Preferably, in step S4, at the beginning of the bonding stage, since the initial contact state between the touch screen and the liquid crystal display may be unstable, the initial movement speed of the second slider is slowly increased from zero to ensure that the pressure roller has enough time to perform good initial bonding with the screen surface, thereby reducing the generation of bubbles or loose bonding during the initial bonding. As the bonding progresses and after confirming that the bonding state is stable, the movement speed is gradually increased.

[0015] In summary, compared with the prior art, the present invention provides a laminating device and a laminating process for a large-size display screen and a touch screen, which has the following beneficial effects: 1. The bonding device for large-size display screens and touch screens of this scheme realizes precise control of the pressure roller and vibration bonding through the coordinated work of the first motor, the second motor and the third motor, and can effectively deal with bubbles in the bonding process, optimize the pressure distribution, adjust the glue distribution, and improve the stress distribution, thereby greatly improving the bonding quality and reducing the possibility of residual bubbles inside the screen after bonding. The vibrating pressure roller makes the pressure on the surface of the touch screen more evenly distributed, which is conducive to the uniform distribution of the glue, improves the bonding effect of the glue, and makes the bonding between the touch screen and the liquid crystal display screen more firm and stable, which not only improves the qualified rate of the product, but also enhances the durability and reliability of the product; 2. In the bonding device for large-size display screens and touch screens of this scheme, the vibration of the pressure roller can change the distribution direction of stress, making the stress more dispersed, reducing the risk of material damage caused by stress concentration, such as the rupture of the touch screen or the damage to the liquid crystal layer of the liquid crystal display screen, which helps to improve the yield rate of products and reduce production costs. The added edge sealing pressure plate can provide stable support for both ends of the display screen when the pressure roller contacts the display screen, preventing the ends of the display screen from rebounding quickly to generate bubbles, thereby enhancing the stability of the bonding process and improving the yield rate; 3. The bonding process of large-size display screens and touch screens in this solution avoids bonding failures caused by equipment failures through pre-detection of motors and overall inspection of equipment, thereby improving production efficiency. The cleaning process before bonding further improves the bonding accuracy and yield rate. The screen surface is glued by a glue dispenser to provide the necessary glue layer for bonding, ensuring the firmness of the bonding. The first motor is used to drive the lead screw to rotate and accurately adjust the position of the pressure roller to avoid errors and damage during the bonding process. 4. In the bonding process of the large-size display screen and the touch screen in this solution, the second motor drives the double-threaded screw rod to rotate, realizing the synchronous relative or opposite movement of the two side pressure rollers, ensuring the smoothness and continuity of the bonding process. This not only improves the bonding efficiency but also reduces the quality problems caused by uneven bonding. During the horizontal bonding, the third motor drives the turntable and the transmission rod to rotate, realizing the synchronous vibration of the pressure rollers, which can effectively handle the bubbles during the bonding process, optimize the pressure distribution and glue distribution, improve the stress distribution, further improve the bonding quality, reduce the possibility of residual bubbles inside the screen after bonding, and make the bond between the touch screen and the liquid crystal display screen more firm and stable. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic sectional view of the mounting bracket of the present invention.

[0018] Figure 3 It is a schematic diagram of the assembly plate structure of the present invention.

[0019] Figure 4 It is a schematic sectional view of the assembly plate of the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the second slider and the connecting frame of the present invention.

[0021] Figure 6 It is a schematic diagram of the structure of the C-shaped frame and the cross bar of the present invention.

[0022] Figure 7 It is a schematic sectional view of the mounting column of the present invention.

[0023] Figure 8 It is a process flow diagram of the bonding process of the large-size display screen and the touch screen of the present invention.

[0024] Description of the Reference Numerals: 1. Base; 2. Mounting bracket; 3. First motor; 4. Lead screw; 5. Guide rod; 6. First slider; 7. Assembly plate; 8. Through groove; 9. Assembly seat; 10. Double-threaded screw rod; 11. First gear; 12. Second motor; 13. Second gear; 14. Second slider; 15. Mounting column; 16. Connecting frame; 17. C-shaped frame; 18. Third motor; 19. Turntable; 20. Cross bar; 21. Transmission rod; 22. Side plate; 23. Pressure roller; 24. Transmission frame; 25. Flexible squeegee; 26. Spring; 27. Disc; 28. Connecting rod; 29. Edge sealing press plate. Detailed Embodiments

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides a technical solution, a laminating device for a large-size display screen and a touch screen, comprising a base 1, a mounting frame 2, a first motor 3, a lead screw 4, a guide rod 5, a first slider 6, an assembly plate 7, a through slot 8, an assembly seat 9, a double-threaded lead screw 10, a first gear 11, a second motor 12, a second gear 13, a second slider 14, a mounting column 15, a connecting frame 16, a shaped frame 17, a third motor 18, a rotating disk 19, a cross bar 20, a transmission rod 21, a side plate 22, a pressure roller 23, a transmission frame 24, a flexible scraper 25, a spring 26, a disc 27, a connecting rod 28 and an edge sealing pressing plate 29: See also Figure 1 The front and rear sides of the base 1 are connected to the mounting frame 2, and the interior of the mounting frame 2 is a hollow structure. The top of the rear mounting frame 2 is installed with a first motor 3 through a tripod, and the rotor of the first motor 3 passes through the interior of the mounting frame 2. Please refer to Figure 2 The bottom end of the rotor of the first motor 3 is coaxially connected with a lead screw 4, a guide rod 5 is inserted into the interior of the front mounting frame 2, and a first slider 6 is sleeved on the exterior of the lead screw 4 and the guide rod 5; The assembly plate 7 is connected to the inner side of the first slide block 6, see Figure 3 and Figure 4 , an assembly seat 9 is installed in the middle of the upper surface of the assembly plate 7, and the interior of the assembly seat 9 is a hollow structure, a double-threaded screw 10 is inserted into the interior of the assembly seat 9 through a bearing, and second sliders 14 are screwed on both sides of the outside of the double-threaded screw 10, the left end of the double-threaded screw 10 passes through the corresponding position of the assembly seat 9, and the left end of the double-threaded screw 10 is coaxially connected to the first gear 11, and a second motor 12 is installed at the upper part of the assembly plate 7 at the rear side of the assembly seat 9, and the rotor of the second motor 12 is coaxially connected to the second gear 13, and a through groove 8 is provided at the bottom of the assembly seat 9 and the middle position of the interior of the assembly plate 7, the inner cavity of the mounting frame 2 and the assembly seat 9 and the shape of the first slider 6 and the second slider 14 are all trapezoidal, the threads on both sides of the outside of the double-threaded screw 10 are set in opposite directions, and the first gear 11 is meshed with the second gear 13; See also Figure 5 and Figure 6, The connecting frame 16 is installed at the bottom of the second slider 14. A U-shaped frame 17 is connected to the bottom of the connecting frame 16. A third motor 18 is installed on the outer side of the U-shaped frame 17 through a tripod. The rotor of the third motor 18 penetrates through the corresponding position inside the U-shaped frame 17. Cross bars 20 are inserted into the inside of the U-shaped frame 17. The inner ends of the cross bars 20 are all connected with transmission frames 24; The turntable 19 is coaxially connected to the outer end of the rotor of the third motor 18. Transmission rods 21 are connected to both the inner and outer sides of the turntable 19, and the transmission rods 21 are inserted into the inside of the transmission frame 24. Side plates 22 are connected to the outer ends of the cross bars 20. Pressure rollers 23 are installed on the inner sides of the side plates 22. The lengths of the cross bars 20 are all greater than the length of the U-shaped frame 17. Flexible scraping plates 25 are installed on the inner sides of the pressure rollers 23. The bottom ends of the flexible scraping plates 25 are flush with the bottom tangent points of the pressure rollers 23. The bottom ends of the flexible scraping plates 25 are all provided with rounded corners; Please refer to Figure 4 , Installation columns 15 are connected to the four corners of the lower surface of the assembly plate 7. Please refer to Figure 7 , The interiors of the installation columns 15 are all hollow structures. Springs 26 are connected to the tops of the inner cavities of the installation columns 15. Discs 27 are connected to the bottom ends of the springs 26. Connecting rods 28 are coaxially installed on the lower surfaces of the discs 27, and the connecting rods 28 all penetrate through the bottoms of the installation columns 15. Sealing edge pressing plates 29 are connected to the bottom ends of the connecting rods 28. The sealing edge pressing plates 29 are arranged in a horizontal L shape. The bottom end faces of the connecting rods 28 all extend beyond the lower cutting surfaces of the pressure rollers 23. Rubber pads are laid on the bottoms of the sealing edge pressing plates 29.

[0027] Please refer to Figure 7 , The bonding process of the large-size display screen and the touch screen of the present invention includes the following steps; S1 Equipment preparation Use the above-mentioned bonding device for the large-size display screen and the touch screen, where the first motor 3, the second motor 12, and the third motor 18 are in a standby state, the assembly plate 7 is in the initial position, and the pressure rollers 23 are in the initial state. When pre-detecting the first motor 3, the second motor 12, and the third motor 18, it includes checking whether the circuit connection of the motor is normal. By using a professional circuit detection instrument, check whether there are short circuits, open circuits, etc. in the power cord and control line of the motor. At the same time, check the rotor of the motor to see if the rotor can rotate flexibly and whether there is any jamming phenomenon, so as to avoid the bonding failure phenomenon caused by the jamming of the rotor during bonding; S2 Placement of the bonding object The touch screen and the LCD screen to be bonded are placed in the bonding working area on the surface of the base, which is located below the pressing roller 23 and can be contacted by the pressing roller 23. Before placing the touch screen and the LCD screen, the touch screen and the LCD screen need to be cleaned with a cleaning agent and a dust-free cloth to remove dust and oil on the surface, so as to avoid impurities being sandwiched between the touch screen and the LCD screen during the bonding process, causing defects and affecting the display effect or touch function. Initial positioning of S3 fitting First, glue is dispensed on the screen surface by a glue dispenser, and then the first motor 3 is started to make the rotor of the first motor 3 drive the lead screw 4 to rotate. Due to the screw connection between the lead screw 4 and the first slider 6 and the guiding effect of the guide rod 5 on the first slider 6, the first slider 6 drives the assembly plate 7 to move downward until the pressure roller 23 installed at the lower part of the assembly plate 7 reaches a predetermined position close to the touch screen and the liquid crystal display surface, and this predetermined position needs to be calculated and adjusted according to the thickness and hardness of the touch screen and the liquid crystal display to avoid excessive pressure from the pressure roller 23 on the touch screen and the liquid crystal display surface; S4 Horizontal Lamination Process The second motor 12 is started, and the rotor of the second motor 12 drives the second gear 13 to rotate. Since the first gear 11 is meshed with the second gear 13, the first gear 11 drives the double-threaded screw 10 to rotate. The threads on both sides of the double-threaded screw 10 are opposite to each other, so that the second sliders 14 on both sides move synchronously relative to or opposite to each other. The connecting frame 16 at the bottom of the second slider 14 drives the pressure roller 23 on the lower side of the shaped frame 17 to perform a bonding action from one side of the touch screen and the liquid crystal display screen to the other side. At the beginning of the bonding, since the initial contact state between the touch screen and the liquid crystal display screen may be unstable, the initial movement speed of the second slider 14 increases slowly from zero to ensure that the pressure roller 23 has enough time to perform a good initial bonding with the screen surface, thereby reducing the generation of bubbles or loose bonding during the initial bonding. As the bonding progresses and after confirming that the bonding state is stable, the movement speed is gradually increased. S5 Synchronous Vibration Fitting Process During the lateral lamination process, the third motor 18 is started, and the rotor of the third motor 18 drives the turntable 19 to rotate. The transmission rod 21 on the turntable 19 drives the transmission frame 24 to make left and right reciprocating motion during the rotation process. The transmission frame 24 drives the side plate 22 and the pressure roller 23 inside the side plate 22 to vibrate synchronously during the lateral lamination movement through the cross bar 20. The bubbles in the lamination process are processed, the pressure distribution is optimized, the glue distribution is adjusted, and the stress distribution is improved through the vibration of the pressure roller 23.

[0028] In this solution, the first motor 3 drives the lead screw 4 to rotate, thereby driving the first slider 6 and the assembly plate 7 to move up and down, so that the pressure roller 23 can be pressed on the surface of the touch screen and the liquid crystal display screen, and then the second motor 12 drives the second gear 13 to rotate, so that the double-thread lead screw 10 can be driven to rotate through the first gear 11, and then the movement of the second slider 14 can be synchronously driven, so that the pressure roller 23 can be bonded with the touch screen and the liquid crystal display screen, and at the same time, the third motor 18 drives the rotation of the turntable 19 and the transmission rod 21, which can drive the transmission frame 24 and the cross bar 20 to reciprocate left and right, so that the pressure roller 23 can vibrate synchronously when performing the lateral bonding movement, so as to generate impact force on large bubbles and break them into smaller bubbles, and small bubbles are more easily discharged with the rolling and vibration of the pressure roller 23, thereby further improving the bonding quality and reducing the post-bonding The possibility of residual bubbles inside the screen is reduced, and the vibrating pressure roller 23 can make the pressure distribution on the surface of the touch screen more uniform. At the same time, the vibration of the pressure roller 23 is conducive to the uniform distribution of glue. The vibration can make the glue flow better in the tiny gap, avoiding local accumulation of glue or areas not covered by glue, which is beneficial to improve the bonding effect of the glue, making the bonding between the touch screen and the liquid crystal display screen more firm and stable, and improving the qualified rate of the product. Secondly, the vibration of the pressure roller 23 can change the distribution direction of the stress, making the stress more dispersed, and can reduce the risk of material damage caused by stress concentration, such as the rupture of the touch screen or the damage of the liquid crystal layer of the liquid crystal display screen, thereby improving the qualified rate of the product. In addition, the vibration bonding helps the material to better adapt to the pressure changes in the bonding process, so that the performance of the bonded screen is more stable during subsequent use.

[0029] At the same time, the edge sealing pressure plate 29 added in the present solution can press the two ends of the display screen when the assembly plate 7 drives the pressure roller 23 to move downward and contacts the display screen. This not only provides stable support for the two ends of the display screen, but also prevents the ends of the display screen from rebounding quickly to generate bubbles, thereby improving the stability and yield rate of the bonding process.

[0030] The bonding device and bonding process of the large-size display screen and touch screen of the present invention bring remarkable beneficial effects, mainly including the following points: Improved lamination quality: The first motor 3, the second motor 12 and the third motor 18 work together to achieve precise control and vibration lamination of the pressure roller 23. This design can effectively handle bubbles during the lamination process, optimize pressure distribution, adjust glue distribution, and improve stress distribution, thereby greatly improving lamination quality and reducing the possibility of residual bubbles inside the screen after lamination.

[0031] Improved product qualification rate: The vibrating pressure roller 23 makes the pressure on the touch screen surface more evenly distributed, which helps to evenly distribute the glue, improves the bonding effect of the glue, and makes the bonding between the touch screen and the liquid crystal display screen more firm and stable. This not only improves the product qualification rate, but also enhances the durability and reliability of the product.

[0032] Reduced risk of material damage: The vibration of the pressure roller 23 can change the distribution direction of stress, making the stress more dispersed, and reducing the risk of material damage caused by stress concentration, such as cracking of the touch screen or damage to the liquid crystal layer of the liquid crystal display. This helps to improve the yield rate of products and reduce production costs.

[0033] Enhanced stability during the bonding process: The additional edge-sealing pressure plate 29 can provide stable support for both ends of the display screen when the pressure roller 23 contacts the display screen, preventing the ends of the display screen from rebounding quickly and generating bubbles. This enhances the stability of the bonding process and improves the yield rate.

[0034] Stronger adaptability: The device and process can be adjusted according to the thickness and hardness of the touch screen and LCD screen to adapt to display screens of different specifications and types, and has a wide range of applicability.

[0035] Easier operation: motor drive and automatic control simplify the laminating process, reduce the complexity and difficulty of manual operation, and improve production efficiency.

[0036] The beneficial effects of the process steps of this scheme include: Equipment preparation stage: Pre-test the motor: Pre-test the motor's circuit connection and rotor flexibility to ensure stable operation of the motor during the bonding process, avoid bonding failures caused by motor failures, and improve production efficiency.

[0037] Ready state: put the motor into the ready-to-start state, fully preparing for the subsequent bonding process.

[0038] The placement phase of the fitted object: Cleaning: Use cleaning agents and dust-free cloth to clean the touch screen and LCD screen, effectively removing dust and oil on the surface, avoiding the impact of impurities on the bonding quality, and improving the bonding accuracy and yield rate.

[0039] Positioning and placement: placing the display screen to be bonded in the bonding working area on the surface of the base 1, ensuring the accuracy and effectiveness of bonding.

[0040] Initial positioning stage of fitting: Glue dispensing: Glue is dispensed on the screen surface through a glue dispensing machine, which provides the necessary glue for the bonding process and ensures a firm bond between the touch screen and the LCD screen.

[0041] Adjust the position of the pressure roller 23: By starting the first motor 3, the position of the pressure roller 23 is accurately adjusted to make it close to and contact the surface of the touch screen and the liquid crystal display screen, thereby avoiding damage to the screen surface due to excessive pressure and ensuring the uniformity and stability of the fit.

[0042] Horizontal bonding process: Synchronous movement: by starting the second motor 12 to drive the double-threaded screw 10 to rotate, the synchronous relative or opposite movement of the pressure rollers 23 on both sides is achieved, ensuring the smoothness and continuity of the laminating process.

[0043] Initial speed control: At the beginning of the lamination, the movement speed of the second slider 14 is controlled to increase slowly from zero, ensuring that the pressure roller 23 and the screen surface have enough time for good initial lamination, thereby reducing the generation of bubbles or loose lamination during the initial lamination.

[0044] Synchronous vibration fitting process: Vibration treatment: By starting the third motor 18, the turntable 19 and the transmission rod 21 are driven to rotate, so that the pressure roller 23 can vibrate synchronously during the horizontal lamination process. This vibration can effectively deal with bubbles in the lamination process, optimize pressure distribution, adjust glue distribution, and improve stress distribution.

[0045] Improve the quality of lamination: The vibrating pressure roller 23 can further improve the quality of lamination, reduce the possibility of residual bubbles inside the screen after lamination, and make the adhesion between the touch screen and the liquid crystal display screen more firm and stable.

[0046] Each step of this solution is designed to improve the accuracy, stability and quality of bonding. Through strict equipment preparation, cleaning, preliminary positioning, lateral bonding and synchronous vibration bonding, the high efficiency, stability and reliability of the display production bonding process are ensured. Specifically, for the bonding of large-size display screens and touch screens in the prior art, for example, after the 1.27-inch product is injected with glue, it takes about 30 minutes to stand still, resulting in a decrease in production efficiency. However, this application uses strict equipment preparation, cleaning, preliminary positioning, lateral bonding and synchronous vibration bonding. After the 1.27-inch product is injected with glue, it only takes 15 minutes to meet the required production requirements, thereby ensuring the high efficiency, stability and reliability of the display production bonding process.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bonding device for a large-size display screen and a touch screen, characterized in that: Comprising: A base (1), mounting brackets (2) are connected to both the front and rear sides of the base (1), and the interiors of the mounting brackets (2) are all hollow structures. At the top of the rear mounting bracket (2), a first motor (3) is installed via a tripod, and the rotor of the first motor (3) penetrates through the interior of the mounting bracket (2). At the bottom end of the rotor of the first motor (3), a lead screw (4) is coaxially connected. A guide rod (5) is inserted into the interior of the front mounting bracket (2). First sliders (6) are sleeved on the outer sides of both the lead screw (4) and the guide rod (5); An assembly plate (7), connected to the inner sides of the first sliders (6). In the middle of the upper surface of the assembly plate (7), an assembly seat (9) is installed, and the interior of the assembly seat (9) is a hollow structure. A double-threaded lead screw (10) is inserted into the interior of the assembly seat (9) via a bearing. Second sliders (14) are screwed on both outer sides of the double-threaded lead screw (10). The left end of the double-threaded lead screw (10) penetrates through the corresponding position of the assembly seat (9), and a first gear (11) is coaxially connected to the left end of the double-threaded lead screw (10). At a position behind the assembly seat (9) in the upper part of the assembly plate (7), a second motor (12) is installed. A second gear (13) is coaxially connected to the rotor of the second motor (12). Through grooves (8) are opened at both the bottom of the assembly seat (9) and the middle position inside the assembly plate (7); A connecting frame (16), installed at the bottom of the second slider (14). A C-shaped frame (17) is connected to the bottom of the connecting frame (16). A third motor (18) is installed on the outer side of the C-shaped frame (17) via a tripod. The rotor of the third motor (18) penetrates through the corresponding position inside the C-shaped frame (17). Cross bars (20) are inserted into the interiors of the C-shaped frames (17). Transmission frames (24) are connected to the inner ends of the cross bars (20); A turntable (19), coaxially connected to the outer end of the rotor of the third motor (18). Transmission rods (21) are connected to both the inner and outer sides of the turntable (19), and the transmission rods (21) are inserted into the interiors of the transmission frames (24). Side plates (22) are connected to the outer ends of the cross bars (20). Pressing rollers (23) are installed on the inner sides of the side plates (22).

2. The bonding device for a large-size display screen and a touch screen according to claim 1, characterized in that: The inner cavities of the mounting brackets (2) and the assembly seats (9) and the shapes of the first sliders (6) and the second sliders (14) are all trapezoidal. The threads on both outer sides of the double-threaded lead screw (10) are set in opposite directions. The first gear (11) meshes with the second gear (13).

3. The laminating device for a large-size display screen and a touch screen according to claim 1, characterized in that: The lengths of the cross bars (20) are all greater than the length of the C-shaped frame (17). Flexible scraping plates (25) are installed on the inner sides of the pressing rollers (23). The bottom ends of the flexible scraping plates (25) are flush with the bottom tangent points of the pressing rollers (23). The bottom ends of the flexible scraping plates (25) are provided with rounded corners.

4. The laminating device for a large-size display screen and a touch screen according to claim 3, characterized in that: The four corners of the lower surface of the assembly plate (7) are connected to mounting columns (15), the interior of the mounting columns (15) is a hollow structure, the top of the inner cavity of the mounting columns (15) is connected to a spring (26), the bottom end of the spring (26) is connected to a disc (27), the lower surface of the disc (27) is coaxially mounted with a connecting rod (28), and the connecting rod (28) passes through the bottom of the mounting column (15), and the bottom end of the connecting rod (28) is connected to an edge sealing pressure plate (29).

5. The laminating device for a large-size display screen and a touch screen according to claim 4, characterized in that: The edge sealing pressing plate (29) is in a transverse L-shape, the bottom end surfaces of the connecting rods (28) are all beyond the lower section of the pressing roller (23), and the bottom of the edge sealing pressing plate (29) is paved with a rubber pad.

6. A laminating process for a large-size display screen and a touch screen, applied to a laminating device for a large-size display screen and a touch screen as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: S1: equipment preparation, wherein the first motor (3), the second motor (12) and the third motor (18) are in a ready-to-start state, the assembly plate (7) is in an initial position, and the pressure roller (23) is in an initial state; S2: placing the laminating object, placing the touch screen and the liquid crystal display screen to be laminated on a laminating working area on the surface of the base, the area being located below the pressing roller (23) and being able to be contacted by the pressing roller (23); S3 preliminary positioning of lamination, firstly, glue is dispensed on the screen surface by a glue dispenser, then the first motor (3) is started, so that the rotor of the first motor (3) drives the lead screw (4) to rotate, and due to the rotational connection between the lead screw (4) and the first slider (6) and the guiding effect of the guide rod (5) on the first slider (6), the first slider (6) drives the assembly plate (7) to move downward until the pressure roller (23) installed at the bottom of the assembly plate (7) reaches a predetermined position close to the touch screen and the surface of the liquid crystal display screen; S4 is a lateral bonding process, in which the second motor (12) is started, and the rotor of the second motor (12) drives the second gear (13) to rotate. Since the first gear (11) is meshed with the second gear (13), the first gear (11) drives the double-threaded screw (10) to rotate. The threads on both sides of the double-threaded screw (10) are in opposite directions, so that the second sliders (14) on both sides move synchronously relative to or opposite to each other. The connecting frame (16) at the bottom of the second slider (14) drives the pressure roller (23) on the lower side of the shaped frame (17) to perform bonding from one side of the touch screen and the liquid crystal display screen to the other side. S5 is a synchronous vibration bonding process. At the same time as the lateral bonding process in step S4, the third motor (18) is started. The rotor of the third motor (18) drives the turntable (19) to rotate. During the rotation process, the transmission rod (21) on the turntable (19) drives the transmission frame (24) to make a left-right reciprocating motion. The transmission frame (24) drives the side plate (22) and the pressure roller (23) inside the side plate (22) to vibrate synchronously during the lateral bonding movement. The vibration of the pressure roller (23) is used to process bubbles in the bonding process, optimize the pressure distribution, adjust the glue distribution, and improve the stress distribution.

7. The bonding process of a large-size display screen and a touch screen according to claim 6, characterized in that: In step S1, the first motor (3), the second motor (12) and the third motor (18) are pre-tested. The pre-test includes checking whether the circuit connection of the motor is normal. By using a professional circuit testing instrument, the power line and the control line of the motor are tested for short circuit and open circuit. At the same time, the rotor of the motor is checked to see whether the rotor can rotate flexibly and whether there is any jamming, so as to avoid the phenomenon of lamination failure caused by the jamming of the rotor during re-lamination.

8. The bonding process of a large-size display screen and a touch screen according to claim 6, characterized in that: In the step S2, before placing the touch screen and the liquid crystal display screen, the touch screen and the liquid crystal display screen are cleaned with a cleaning agent and a dust-free cloth to remove dust and oil stains on the surface.

9. The bonding process of a large-size display screen and a touch screen according to claim 6, characterized in that: The determination of the predetermined position in step S3 is calculated and adjusted according to the thickness and hardness of the touch screen and the liquid crystal display.

10. The bonding process of a large-size display screen and a touch screen according to claim 6, characterized in that: In step S4, at the beginning of the bonding process, since the initial contact state between the touch screen and the liquid crystal display screen is unstable, the initial movement speed of the second slider (14) is started from zero to ensure that the pressure roller (23) and the screen surface have enough time to perform good initial bonding, thereby reducing the generation of bubbles or loose bonding during the initial bonding. As the bonding progresses and the bonding state is confirmed to be stable, the movement speed is gradually increased.

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