Assembling and laminating device for liquid crystal display panel and backlight module

Abstract

The invention provides an assembling and laminating device for a liquid crystal display panel and a backlight module, and belongs to the technical field of display screen processing, the assembling and laminating device comprises a conveyor, the backlight module, square glue, the liquid crystal display panel, a conveyor belt for conveying the liquid crystal display panel, a suction clamping and assembling mechanism for adsorbing and conveying the liquid crystal display panel, and a press fitting assembly, a switching vacuum-pumping assembly; the device integrates the functions of film tearing, adsorption, attaching, press fitting and vacuumizing, the release film is stripped step by step, and the production stability and the product consistency are improved; the press-fitting assembly realizes uniform distribution of pressure at a fitting position by virtue of cooperation of air pressure and a spring, so that the bonding strength is enhanced, and the product reliability and the display quality are improved; the switching vacuum pumping assembly automatically switches vacuum paths, vacuum requirements of adsorption and lamination are integrated in the same system, it is ensured that a suction cup stably grabs a panel under negative pressure during adsorption, bubble residues are avoided through vacuum auxiliary pressing during lamination, the independent vacuum pumping procedure is omitted, the production period is shortened, and the production efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen processing, and in particular, to an assembly and bonding device for a liquid crystal display panel and a backlight module. Background Art

[0002] The liquid crystal display panel itself does not emit light and needs to rely on the light source provided by the backlight module to display normally. The existing display screen consists of a backlight module, a frame for placing the backlight module, and a liquid crystal display panel arranged on the frame. The liquid crystal display panel is bonded and assembled with the frame of the backlight module through glue, and after the two are assembled, the backlight module provides a uniformly illuminated surface light for the liquid crystal display panel.

[0003] In the technical field of the bonding and assembly of liquid crystal display panels and backlight modules, existing equipment has significant defects in the vacuum treatment link. Currently, most bonding and assembly equipment, after completing the assembly of the liquid crystal display panel and the backlight module, needs to transfer the product to an independent vacuum pumping device for secondary treatment, and fails to synchronously perform the vacuum pumping operation during the bonding process. Since vacuum pumping is not performed during bonding, air is extremely likely to remain between the glue layer, the liquid crystal display panel, and the backlight module, forming bubbles or air gaps. These air media will change the propagation path of light in the glue layer, resulting in the light emitted by the backlight module being unable to uniformly pass through the liquid crystal display panel, thereby generating Mura phenomena such as local brightness unevenness and color patches in the display screen. This phenomenon seriously affects the clarity and color uniformity of the display screen, reduces the user's visual experience. In addition, the long-term existence of bubbles will increase light scattering loss, resulting in a decrease in the overall brightness and contrast of the display, and being unable to meet the stringent requirements for optical performance of high-end display products.

[0004] How to invent an assembly and bonding device for a liquid crystal display panel and a backlight module to solve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0005] To make up for the above deficiencies, the present invention provides an assembly and bonding device for a liquid crystal display panel and a backlight module, aiming to solve the problems mentioned in the above background.

[0006] The present invention is implemented as follows: The present invention provides an assembly and bonding device for a liquid crystal display panel and a backlight module, comprising a conveyor, a backlight module, a word glue, a liquid crystal panel, a conveyor belt for conveying the liquid crystal panel, and a suction clamp assembly mechanism for adsorbing and conveying the liquid crystal panel, wherein a gluing station and an assembly station are sequentially arranged on the side of the conveyor, a mobile base is slidably arranged on the conveyor, a positioning frame is installed in the mobile base, the backlight module is placed in the positioning frame, a gluing mechanism is arranged on the gluing station, and the gluing mechanism is used to attach the word glue to the backlight module, a mounting shell is installed above the assembly station, the conveyor belt is located below the mounting shell, a positioning plate for guiding the liquid crystal panel is installed on the conveyor belt, the suction clamp assembly mechanism is arranged in the mounting shell, and further comprises: Press-fit assembly: The press-fit assembly is arranged on the suction clamp assembly mechanism; Conversion vacuum pumping assembly: The conversion vacuum pumping assembly is arranged on the suction clamp assembly mechanism.

[0007] Preferably, the glue sticking mechanism includes a mounting frame and a telescopic positioning frame installed on the glue sticking station, the mouth glue is slidably sleeved on the outside of the output end of the telescopic positioning frame, the mounting frame is slidably connected with an electric slide, a cylinder 1 is installed at the bottom of the electric slide, the output end of the cylinder 1 is connected to an exhaust plate, a positioning table matching the mouth glue is formed at the bottom of the exhaust plate, a plurality of suction holes are opened inside the exhaust plate, the suction holes are arranged around the positioning table and correspond to the position of the mouth glue, a positioning rod is arranged on the lower side of the exhaust plate, and a positioning hole matching the positioning rod is arranged on the positioning frame.

[0008] Preferably, the mouth-shaped adhesive is composed of a mouth-shaped adhesive frame and release films adhered to the upper and lower sides thereof, one end of the release film is provided with a tearing handle, and a film tearing assembly is provided on the movable base.

[0009] Preferably, the film tearing assembly includes a slide groove provided on the movable base and an inclined groove provided on one side of the positioning frame, the position of the inclined groove corresponds to the tearing position of the release film, an electric slider 1 is slidably provided in the slide groove, a micro-telescopic cylinder is installed inside the electric slider 1, a suction rod is installed at the output end of the micro-telescopic cylinder, a suction nozzle is provided at the end of the suction rod, the position of the suction nozzle corresponds to the position of the inclined groove, and the electric slider 1 in the initial state is located at one end of the slide groove close to the inclined groove.

[0010] Preferably, when the mobile base moves to the glue - sticking station, the first cylinder drives the air - extraction plate to move downward to suck the square - shaped glue, and then moves to directly above the mobile base through the electric slide table. First, it descends a certain height. The micro - telescopic cylinder drives the suction lever to move upward to the height between the release films on both sides of the square - shaped glue. Then, control the first electric slider to move towards the square - shaped glue. When it moves to the tearing - hand position, the micro - telescopic cylinder moves downward to press the lower release film and starts the suction nozzle to suck the tearing - hand position of the lower release film. At this time, control the first electric slider to move to peel off the lower release film. After peeling, the first electric slider and the micro - telescopic cylinder reset. Then, control the first cylinder to move downward to press and mount the square - shaped glue frame on the backlight module through the air - extraction plate. Then, the air - extraction plate stops working, and the electric slide table and the first cylinder reset. At this time, the tearing - hand position of the upper release film is at the inclined groove. Control the first electric slider to move towards the inclined groove, start the suction nozzle to suck the tearing - hand position of the upper release film, control the first electric slider to move to peel off the upper release film. After peeling, move the mobile base to the assembly station through the conveyor, and the peeled - off release film is collected by an external manipulator.

[0011] Preferably, the suction - clamping and assembling mechanism includes a connecting plate and an electric slider two slidably arranged in the installation shell. The connecting plate is hollow - arranged. A second cylinder is installed on the lower side of the electric slider two. The output end of the second cylinder is installed with a cover body. A plurality of suction - cup tubes are slidably and sealingly connected to the cover body. Suction cups are arranged at the bottoms of the suction - cup tubes. Upper retaining rings and lower retaining rings are respectively arranged on the outer side walls of the suction - cup tubes. The upper retaining ring is located above the cover body, and the lower retaining ring is below the cover body. A first spring is fixedly connected to the upper side wall of the lower retaining ring, and the upper end of the first spring is fixedly connected to the bottom wall of the cover body. The tops of a plurality of the suction - cup tubes are communicated with the inner cavity of the connecting plate. A suction port is arranged at the top of the connecting plate, and the end of the suction port is connected to an external air - extraction pump through a hose. In the initial state, the suction cups are below the lower end of the cover body, and a sealing gasket is arranged at the lower end of the cover body.

[0012] Preferably, the press - fitting component includes a connecting bottom plate fixedly connected to the upper side wall of the lower retaining ring, an installation box fixedly connected to the inner top wall of the cover body, and a connecting channel opened inside the cover body. A corrugated tube is connected to the upper side of the connecting bottom plate, and the upper end of the corrugated tube is connected to the inner top wall of the cover body. The connecting bottom plate, the corrugated tube, and the inner top wall of the cover body enclose a sealed space. One end of the connecting channel is located inside the installation box, and the other end is located inside the sealed space. A plurality of second springs are fixedly connected to the top wall of the installation box, and a rubber block is fixedly connected to the lower ends of the second springs. The rubber block is connected with the installation box in a limiting and sliding manner.

[0013] Preferably, the connecting bottom plate is made of a hard material. The installation box and the rubber block are both in a frame shape. The rubber block is sealingly connected with the installation box, and the position of the rubber block corresponds to the square - shaped glue frame on the backlight module.

[0014] Preferably, the conversion and vacuum pumping assembly includes a motor mounted on the top wall of the connecting plate, a conversion member rotatably disposed inside the connecting plate, a sensor fixedly mounted on the top of the connecting bottom plate, and a plurality of connecting pipes penetrating and connecting the side wall of the connecting plate. A jack matching the connecting pipe is provided inside the cover body. The output end of the motor is located inside the connecting plate and is fixedly connected with a gear thereon. The conversion member is composed of a first sealing plate, a second sealing plate and a gear ring from bottom to top. The bottom of the first sealing plate abuts against the bottom wall of the inner cavity of the connecting plate, the top of the gear ring abuts against the top wall of the inner cavity of the connecting plate, the second sealing plate abuts against the side wall of the inner cavity of the connecting plate, the gear is meshed with the gear ring, and an air guide hole matching the suction cup pipe is provided on the first sealing plate.

[0015] Preferably, the sensor is a distance sensor, and the sensor is electrically connected with the motor. The distribution of the second sealing plate matches the distribution of the connecting pipes. When the bottom of the sealing gasket abuts against the top wall of the moving base, the bottom of the suction cup and the bottom of the rubber block both abut against the top wall of the liquid crystal panel. In the initial state, the position of the air guide hole corresponds to that of the suction cup pipe, and the second sealing plate blocks the end of the corresponding connecting pipe. When the bottom of the sealing gasket abuts against the top wall of the moving base, the top end of the suction cup pipe is blocked by the first sealing plate, and the second sealing plate no longer blocks the end of the corresponding connecting pipe.

[0016] The beneficial effects of the present invention are as follows: The device integrates functions of automatic film tearing, adsorption, fitting, pressing and vacuum pumping. The whole process reduces manual intervention. The upper and lower release films of the mouth-shaped glue are peeled off step by step. First, the lower film is peeled off and then the glue frame is pasted. Finally, the upper film is removed, avoiding the influence of traditional one-time film tearing on the position of the glue frame, reducing the generation of bubbles, and improving production stability and consistency. The pressing assembly cooperates with air pressure and springs to evenly press the rubber block on the fitting place. The rubber block corresponds to the position of the mouth-shaped glue frame and has a frame design, ensuring that the pressure is evenly distributed on the glue layer, solving problems such as inconsistent glue layer thickness, Mura phenomenon and low fitting strength caused by uneven pressure of traditional equipment, enhancing the bonding strength and improving the reliability of the product.

[0017] The conversion and vacuum pumping assembly realizes the automatic switching of the vacuum path in the processes of adsorption and fitting of the liquid crystal panel, ensuring the high efficiency and stability of assembly and fitting. The vacuum pumping function of traditional equipment is dispersed in multiple modules, occupying a large space and being complex to maintain. This assembly integrates the vacuum requirements of adsorption and fitting into the same system, reduces external pipelines and connectors, reduces the probability of air leakage, ensures stable negative pressure of the suction cup to grab the panel during adsorption, and applies vacuum to the inside of the cover body to assist pressing during fitting, avoiding bubble residue, reducing Mura phenomenon and bubble generation. At the same time, the separate vacuum pumping process is omitted, shortening the production cycle, simplifying the air circuit design, significantly reducing the probability of air leakage, and improving the stability and reliability of the vacuum system. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the air extraction plate and the mouth-shaped glue structure of the present invention; Figure 3 is a schematic diagram of the film tearing assembly structure of the present invention; Figure 4 is a schematic diagram of the internal structure of the installation shell of the present invention; Figure 5 is a schematic diagram of the positioning plate and the conveyor belt structure of the present invention; Figure 6 is a schematic diagram of the cross-sectional structure of the cover body of the present invention; Figure 7 is of the present invention Figure 6 The enlarged structure schematic diagram at A in; Figure 8 is a front view schematic diagram of the cross-sectional structure of the cover body of the present invention; Figure 9 is of the present invention Figure 8 The enlarged structure schematic diagram at B in; Figure 10 is a schematic diagram of the cross-sectional structure of the connecting plate of the present invention; Figure 11 is a schematic diagram of the structure when the conversion vacuum extraction assembly of the present invention is working; Figure 12 is of the present invention Figure 11 The enlarged structure schematic diagram at C in; Figure 13 is a schematic diagram of the internal structure of the conversion part and the connecting plate of the present invention.

[0020] In the figure: 1. Conveyor; 2. Glue - sticking station; 3. Assembly station; 4. Moving base; 5. Installation shell; 6. Cover body; 7. Connecting plate; 8. Motor; 9. Conversion part; 10. Backlight module; 11. Square - shaped glue; 12. Liquid crystal panel; 21. Mounting rack; 22. Telescopic positioning rack; 23. Cylinder 1; 24. Air - extraction plate; 31. Conveyor belt; 32. Positioning plate; 41. Positioning frame; 42. Chute; 43. Micro - telescopic cylinder; 44. Suction - type lever; 51. Electric slider 2; 52. Cylinder 2; 61. Sealing gasket; 62. Jack; 71. Connecting pipe; 72. Air - extraction port; 73. Suction - cup pipe; 74. Spring 1; 75. Connecting bottom plate; 76. Inductor; 77. Connecting channel; 78. Installation box; 81. Gear; 91. Sealing plate 1; 92. Sealing plate 2; 93. Gear ring; 111. Square - shaped glue frame; 112. Release film; 241. Positioning table; 242. Air - suction hole; 243. Positioning rod; 411. Inclined groove; 412. Positioning hole; 421. Electric slider 1; 731. Upper retaining ring; 732. Lower retaining ring; 751. Corrugated cylinder; 781. Spring 2; 782. Rubber block; 911. Air - guiding hole. Specific embodiments

[0021] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] Example 1. Refer to Figures 1 - 12 , an assembly and bonding device for a liquid crystal display panel and a backlight module, including a conveyor 1, a backlight module 10, a square - shaped glue 11, a liquid crystal panel 12, a conveyor belt 31 for conveying the liquid crystal panel 12, and a suction - clamping assembly for adsorbing and conveying the liquid crystal panel 12. A glue - sticking station 2 and an assembly station 3 are sequentially arranged on the side of the conveyor 1. A moving base 4 is slidably arranged on the conveyor 1. A positioning frame 41 is installed in the moving base 4. The backlight module 10 is placed in the positioning frame 41. A glue - sticking mechanism is arranged at the glue - sticking station 2, and the glue - sticking mechanism is used to stick the square - shaped glue 11 on the backlight module 10. An installation shell 5 is installed above the assembly station 3. The conveyor belt 31 is located below the installation shell 5. A positioning plate 32 for guiding the liquid crystal panel 12 is installed on the conveyor belt 31. The suction - clamping assembly is arranged in the installation shell 5, and further includes: Press - fitting component: The press - fitting component is arranged on the suction - clamping assembly; Conversion and vacuum - extraction component: The conversion and vacuum - extraction component is arranged on the suction - clamping assembly.

[0023] Furthermore, the glue pasting mechanism includes a mounting bracket 21 and a telescopic positioning bracket 22 installed at the glue pasting station 2. The square-shaped glue 11 is slidably sleeved outside the output end of the telescopic positioning bracket 22. An electric slide table is slidably connected to the mounting bracket 21. A first cylinder 23 is installed at the bottom of the electric slide table. The output end of the first cylinder 23 is connected to an air extraction plate 24. A positioning table 241 matching the square-shaped glue 11 is formed at the bottom of the air extraction plate 24. A number of air suction holes 242 are formed inside the air extraction plate 24. The air suction holes 242 are arranged around the positioning table 241 and correspond to the position of the square-shaped glue 11. A positioning rod 243 is arranged on the lower side of the air extraction plate 24. A positioning hole 412 matching the positioning rod 243 is provided on the positioning frame 41. The picking and pasting of the square-shaped glue 11 are realized through the electric slide table and the first cylinder 23. The air suction holes 242 cooperate with a vacuum pump to form negative pressure adsorption. The positioning table 241 and the positioning rod 243 ensure that the glue frame is aligned with the edge of the backlight module 10.

[0024] The square-shaped glue 11 is composed of a square-shaped glue frame 111 and release films 112 adhered to its upper and lower sides. One end of the release film 112 is provided with a tearing position for easy removal by manual or mechanical means. A film tearing assembly is provided on the moving base 4; the film tearing assembly includes a chute 42 formed on the moving base 4 and an inclined chute 411 provided on one side of the positioning frame 41. The position of the inclined chute 411 corresponds to the tearing position of the release film 112 to ensure that there is a position for placing the tearing position of the release film 112, facilitating subsequent operations. An electric slider 421 is slidably arranged in the chute 42. A micro telescopic cylinder 43 is installed inside the electric slider 421. The output end of the micro telescopic cylinder 43 is installed with a suction lever 44. The end of the suction lever 44 is provided with a suction nozzle. The position of the suction nozzle corresponds to the position of the inclined chute 411 to ensure that the suction nozzle can act on the tearing position there. In the initial state, the electric slider 421 is located at one end of the chute 42 close to the inclined chute 411 to avoid affecting the pasting operation of the glue frame.

[0025] When the moving base 4 moves to the glue - sticking station 2, the first cylinder 23 drives the air - extraction plate 24 to move downward and suck the square - shaped glue 11. Then, it moves above the moving base 4 through the electric slide table. First, it descends a certain height. The micro - telescopic cylinder 43 drives the suction lever 44 to move upward to the height between the release films 112 on both sides of the square - shaped glue 11. Then, it controls the first electric slider 421 to move towards the square - shaped glue 11. When it moves to the tearing position, the micro - telescopic cylinder 43 moves downward to press the lower release film 112 and starts the suction nozzle to suck the tearing position of the lower release film 112. At this time, it controls the first electric slider 421 to move to peel off the lower release film 112. After peeling, the first electric slider 421 and the micro - telescopic cylinder 43 reset. Then, it controls the first cylinder 23 to move downward to press and mount the square - shaped glue frame 111 on the backlight module 10 through the air - extraction plate 24. Then, the air - extraction plate 24 stops working, and the electric slide table and the first cylinder 23 reset. At this time, the tearing position of the upper release film 112 is located at the inclined groove 411. It controls the first electric slider 421 to move towards the inclined groove 411, starts the suction nozzle to suck the tearing position of the upper release film 112, and controls the first electric slider 421 to move to peel off the upper release film 112. After peeling, it moves the moving base 4 to the assembly station 3 through the conveyor 1. The peeled - off release film 112 is collected by an external manipulator. The film - tearing assembly peels off by mechanical positioning and suction, avoiding the tearing or residue of the release film 112 caused by manual intervention, improving the glue - sticking accuracy and efficiency, peeling off the upper and lower release films 112 step by step, ensuring no offset when the square - shaped glue frame 111 is attached, and reducing the generation of bubbles.

[0026] Furthermore, the suction - clamping assembly mechanism includes a connecting plate 7 and an electric slider two 51 slidably arranged in the installation shell 5. The connecting plate 7 is hollow - arranged. A second cylinder 52 is installed on the lower side of the electric slider two 51. The output end of the second cylinder 52 is installed with a cover body 6. A plurality of suction - cup tubes 73 are slidably and sealingly connected to the cover body 6. Suction cups are arranged at the bottoms of the suction - cup tubes 73. Upper retaining rings 731 and lower retaining rings 732 are respectively arranged on the outer side walls of the suction - cup tubes 73. The upper retaining ring 731 is located above the cover body 6, and the lower retaining ring 732 is located below the cover body 6. The upper retaining ring 731 and the lower retaining ring 732 play a limiting role. A first spring 74 is fixedly connected to the upper side wall of the lower retaining ring 732, and the upper end of the first spring 74 is fixedly connected to the bottom wall of the cover body 6. The tops of a plurality of suction - cup tubes 73 are all communicated with the inner cavity of the connecting plate 7. An air - extraction port 72 is arranged at the top of the connecting plate 7. The end of the air - extraction port 72 is connected to an external air - extraction pump through a hose. The suction cup adsorbs the liquid - crystal panel 12 by the negative pressure generated by the air - extraction pump and moves it above the backlight module 10 with the glue frame attached through the electric slider two 51. The assembly of the liquid - crystal panel 12 and the backlight module 10 is realized by the drive of the second cylinder 52. In the initial state, the suction cup is below the lower end of the cover body 6. A sealing gasket 61 is arranged at the lower end of the cover body 6, which can form an effective seal when contacting the top wall of the moving base 4.

[0027] Further, the press-fitting assembly includes a connecting base plate 75 fixedly connected to the upper side wall of the lower retaining ring 732, a mounting box 78 fixedly connected to the inner top wall of the cover body 6, and a connecting channel 77 opened inside the cover body 6. A corrugated tube 751 is connected to the upper side of the connecting base plate 75. The upper end of the corrugated tube 751 is connected to the inner top wall of the cover body 6. The connecting base plate 75, the corrugated tube 751, and the inner top wall of the cover body 6 enclose a sealed space. One end of the connecting channel 77 is located inside the mounting box 78, and the other end is located inside the sealed space. A plurality of second springs 781 are fixedly connected to the top wall of the mounting box 78. The lower end of the second spring 781 is fixedly connected to a rubber block 782. The rubber block 782 is connected to the mounting box 78 in a limited sliding manner. When the cylinder two 52 drives the cover body 6 to move downward, the liquid crystal panel 12 will gradually fit with the backlight module 10. At this time, the suction cup will drive the connecting base plate 75 and the suction cup tube 73 to move upward. At this time, the first spring 74 is in a compressed state, and the gas in the sealed space is compressed. It will enter the top of the inner cavity of the mounting box 78 through the corresponding connecting channel 77. This part of the gas will overcome the elastic force of the second spring 781 and push the rubber block 782 to move downward, realizing the compaction treatment of the joint between the liquid crystal panel 12 and the backlight module 10, assisting the pressing action of a plurality of suction cups and the first spring 74, and realizing the assembly and fitting of the liquid crystal panel 12 and the backlight module 10.

[0028] It should be noted that the connecting base plate 75 is made of a hard material. The mounting box 78 and the rubber block 782 are both in a frame shape to ensure uniform pressure. The rubber block 782 is hermetically connected to the mounting box 78 to prevent the gas inside the sealed space from leaking. The position of the rubber block 782 corresponds to the upper square-shaped rubber frame 111 of the backlight module 10 to ensure that the rubber block 782 can act on the square-shaped rubber frame 111 on the backlight module 10 when it moves downward.

[0029] In this embodiment, when the moving base 4 moves to the glue - sticking station 2, the first cylinder 23 drives the air - extraction plate 24 to move downward and suck the square - shaped glue 11. Then, it moves to directly above the moving base 4 through the electric slide table. First, it descends a certain height. The micro - telescopic cylinder 43 drives the suction lever 44 to move upward to the height between the release films 112 on both sides of the square - shaped glue 11. Then, it controls the first electric slider 421 to move towards the square - shaped glue 11. When it moves to the tearing position, the micro - telescopic cylinder 43 moves downward to press the lower release film 112 and starts the suction nozzle to suck the tearing position of the lower release film 112. At this time, it controls the first electric slider 421 to move to peel off the lower release film 112. After peeling, the first electric slider 421 and the micro - telescopic cylinder 43 reset. Then, it controls the first cylinder 23 to move downward to press and mount the square - shaped glue frame 111 on the backlight module 10 through the air - extraction plate 24. Then, the air - extraction plate 24 stops working, and the electric slide table and the first cylinder 23 reset. At this time, the tearing position of the upper release film 112 is located at the inclined groove 411. It controls the first electric slider 421 to move towards the inclined groove 411, starts the suction nozzle to suck the tearing position of the upper release film 112, controls the first electric slider 421 to move to peel off the upper release film 112. After peeling, it moves the moving base 4 to the assembly station 3 through the conveyor 1 to complete the assembly process. The peeled - off release film 112 is collected by an external manipulator. The film - tearing assembly uses mechanical positioning and suction peeling to avoid the tearing or residue of the release film 112 caused by manual intervention, improving the glue - sticking accuracy and efficiency. The upper and lower release films 112 are peeled off step by step to ensure that there is no offset when the square - shaped glue frame 111 is attached, reducing the generation of bubbles.

[0030] When it is necessary to adsorb the liquid - crystal panel 12, the air - extraction pump makes the suction cup generate negative pressure through the air - extraction port 72 to adsorb the liquid - crystal panel 12. Then, it moves the suction cup with the adsorbed liquid - crystal panel 12 to directly above the backlight module 10 with the glued - on frame through the second electric slider 51, and then drives the liquid - crystal panel 12 to approach and gradually fit with the backlight module 10 through the drive of the second cylinder 52.

[0031] After the liquid - crystal panel 12 is fitted with the backlight module 10, the suction cup will drive the connecting bottom plate 75 and the suction - cup tube 73 to move upward. The first spring 74 is in a compressed state, and the gas in the closed space is compressed. This part of the compressed gas will enter the top cavity of the mounting box 78 through the corresponding connecting channel 77, overcome the elastic force of the second spring 781 and push the rubber block 782 to move downward, realizing the compaction treatment of the fitting part between the liquid - crystal panel 12 and the backlight module 10, assisting the pressing action of several suction cups and the first spring 74, and finally realizing the tight assembly and fitting of the liquid - crystal panel 12 and the backlight module 10.

[0032] The device integrates functions of automatic film tearing, adsorption, fitting and pressing, reducing manual intervention throughout the process. The film tearing component replaces manual operation through mechanical positioning and suction peeling, reducing the risk of human error. It peels the upper and lower release films 112 of the mouth-shaped adhesive 11 step by step. First, it peels the lower film and then pastes the adhesive frame, and finally removes the upper film, avoiding the influence of traditional one-time film tearing on the position of the adhesive frame, reducing the generation of bubbles, and improving production stability and consistency. The adhesive pasting mechanism uses the cooperation of the positioning table 241, positioning rod 243 and suction holes 242 to achieve high-precision picking and pasting of the mouth-shaped adhesive 11. The suction and clamping assembly mechanism combines an electric slider, a cylinder and a suction cup array to ensure the precise alignment of the liquid crystal panel 12 and the backlight module 10. The pressing component uses the cooperation of air pressure and springs to evenly press the rubber block 782 against the fitting position. The first spring 74 and the rubber block 782 effectively protect the liquid crystal panel 12 during adsorption and pressing, preventing damage caused by rigid impact. The rubber block 782 corresponds to the position of the mouth-shaped adhesive frame 111 and has a frame design, ensuring that the pressure is evenly distributed on the adhesive layer, enhancing the bonding strength, reducing the poor fitting rate caused by uneven pressure, and improving the overall reliability of the product.

[0033] Example 2, referring to Figures 6 - 13 , the vacuum conversion assembly includes a motor 8 installed on the top wall of the connecting plate 7, a conversion part 9 rotatably arranged inside the connecting plate 7, a sensor 76 fixedly installed on the top of the connecting bottom plate 75, and a number of connecting pipes 71 penetrating and connecting the side wall of the connecting plate 7. A jack 62 matching the connecting pipe 71 is opened inside the cover body 6. The output end of the motor 8 is located inside the connecting plate 7 and is fixedly connected with a gear 81 thereon. The conversion part 9 is composed of a first sealing plate 91, a second sealing plate 92 and a tooth ring 93 from bottom to top. The bottom of the first sealing plate 91 abuts against the bottom wall of the inner cavity of the connecting plate 7, the top of the tooth ring 93 abuts against the top wall of the inner cavity of the connecting plate 7, and the second sealing plate 92 abuts against the side wall of the inner cavity of the connecting plate 7. The second sealing plate 92 is used to block or open the end of the connecting pipe 71. The gear 81 is meshed with the tooth ring 93. When the motor 8 is started, the gear 81 will drive the tooth ring 93 to rotate to switch the working state of the conversion part 9. The first sealing plate 91 is provided with an air guide hole 911 matching the suction cup pipe 73.

[0034] It should be noted that the sensor 76 is a distance sensor for real-time monitoring of the distance between the connection base plate 75 and the inner top wall of the cover 6. The sensor 76 is electrically connected to the motor 8. When the sensor 76 detects that the distance change is less than the threshold value, the motor 8 is triggered. The distribution of the second sealing plate 92 matches the distribution of the connecting pipe 71. When the bottom of the sealing gasket 61 is attached to the top wall of the moving base 4, the bottom of the suction cup and the bottom of the rubber block 782 are both abutted against the top wall of the liquid crystal panel 12. At this time, under the combined action of the suction cup and the rubber block 782, the liquid crystal panel 12 is pressed, ensuring that the liquid crystal panel 12 is attached to the backlight module 10. At the same time, at this time, the positioning frame 41 is completely inside the cover 6, and a closed area is formed between the inside of the cover 6 and the moving base 4. In the initial state, the air guide hole 911 corresponds to the position of the suction cup pipe 73, and the second sealing plate 92 blocks the end of the corresponding connecting pipe 71. At this time, the inner cavity of the connecting plate 7 is communicated with the suction cup pipe 73, and the connecting pipe 71 is blocked (refer to Figure 7 ), and the sucking operation of the liquid crystal panel 12 can be performed. When the bottom of the sealing gasket 61 is attached to the top wall of the moving base 4, the top end of the suction cup pipe 73 is blocked by the first sealing plate 91, and the second sealing plate 92 no longer blocks the end of the corresponding connecting pipe 71. At this time, the connecting pipe 71 is communicated with the inner cavity of the connecting plate 7, and the top end of the suction cup pipe 73 is in a blocked state (refer to Figure 12 ). At this time, the sucking operation is completed, the suction cup pipe 73 is closed, and the vacuum pumping process after the liquid crystal panel 12 is attached to the backlight module 10 is realized through the connecting pipe 71. During this process, the suction cup and the rubber block 782 still press the liquid crystal panel 12.

[0035] In this embodiment, in the initial state, each component of the conversion vacuum pumping assembly is in the ready position, the motor 8 on the top wall of the connecting plate 7 is not started, the bottom of the first sealing plate 91 in the conversion member 9 abuts against the bottom wall of the inner cavity of the connecting plate 7, and its air guide hole 911 corresponds to the position of the suction cup pipe 73, so that the inner cavity of the connecting plate 7 is communicated with the suction cup pipe 73. At this time, a negative pressure can be formed through an external air pump through the air extraction port 72, the inner cavity of the connecting plate 7, the air guide hole 911, the suction cup pipe 73 to the suction cup, and the sucking operation of the liquid crystal panel 12 is performed; at the same time, the second sealing plate 92 blocks the end of the corresponding connecting pipe 71 to avoid vacuum leakage, and the sensor 76 on the top of the connection base plate 75 monitors the distance between it and the inner top wall of the cover 6 in real time.

[0036] When the second cylinder 52 drives the cover 6 to descend until the bottom of the sealing gasket 61 is attached to the top wall of the moving base 4, the bottom of the suction cup and the bottom of the rubber block 782 are both abutted against the top wall of the liquid crystal panel 12, and the positioning frame 41 is completely inside the cover 6, and a closed area is formed between the inside of the cover 6 and the moving base 4; during this process, the suction cup drives the connection base plate 75 to move upward under the block of the liquid crystal panel 12, so that the distance between the connection base plate 75 and the inner top wall of the cover 6 changes. When the sensor 76 detects that the distance change is less than the preset threshold value, a signal is sent to the motor 8 to trigger the motor 8 to start.

[0037] After the motor 8 is started, the gear 81 at its output end drives the gear ring 93 meshing with it to rotate, thereby causing the conversion member 9 to rotate as a whole; as the conversion member 9 rotates, the air guide hole 911 on the sealing plate 1 91 is staggered with the suction cup tube 73, blocking the top of the suction cup tube 73 and cutting off the vacuum adsorption of the suction cup; at the same time, the sealing plate 2 92 no longer blocks the corresponding end of the connecting tube 71, so that the connecting tube 71 is connected to the inner cavity of the connecting plate 7; at this time, the vacuum path generated by the external vacuum pump is transformed into the vacuum path through the vacuum port 72, the inner cavity of the connecting plate 7, the connecting tube 71, and the jack 62 to the inside of the cover body 6, thereby realizing the vacuum treatment of the liquid crystal panel 12 and the backlight module 10 after being bonded together. During this vacuum process, the suction cup and the rubber block 782 continue to press the liquid crystal panel 12. Under the action of the negative pressure inside the cover body 6 and the spring 2 781, the rubber block 782 applies pressure to the bonding point between the liquid crystal panel 12 and the backlight module 10 to ensure that the two are tightly fitted.

[0038] Through the above process, the conversion vacuum pumping component realizes the automatic switching of the vacuum path in the adsorption and bonding process of the liquid crystal panel 12, ensuring the high efficiency and stability of the assembly and bonding. The vacuum pumping function of traditional equipment is scattered in multiple modules, which occupies a large space and is complicated to maintain. This component integrates the vacuum requirements of adsorption and bonding into the same system, reduces external pipes and connectors, and reduces the probability of air leakage; this component realizes the precise switching of the vacuum path through the rotation of the sealing plate 1 91 and the sealing plate 2 92, ensures that the suction cup stably grasps the panel under negative pressure during adsorption, and applies the vacuum to the inside of the cover body 6 to assist in pressing during bonding, thereby simplifying the gas path design and improving the vacuum utilization efficiency; the existing technology can be used in the bonding stage In order to prevent problems such as panel displacement due to failure to release the adsorption force in time, bubbles and loose bonding due to uneven pressure, the component cuts off the suction cup vacuum during bonding, and only applies flexible pressure through the rubber block 782 and the spring 2 781, and cooperates with the vacuum inside the cover body 6 to ensure that the pressure is evenly distributed in the mouth glue 11 area, effectively reducing the Mura phenomenon (a common quality problem in the field of liquid crystal display, which refers to visual abnormalities such as uneven brightness, inconsistent colors, stripes or patches on the surface of the liquid crystal display, which will seriously affect the display effect and user experience) and bubble generation, and improving the bonding yield; at the same time, the automatic switching of the vacuum path reduces the waiting time of the process and improves the overall production efficiency.

[0039] It should be noted that the specific models and specifications of the distance sensor, motor, cylinder, etc. need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An assembly and bonding device for a liquid crystal display panel and a backlight module, comprising a conveyor (1), a backlight module (10), a frame-shaped adhesive (11), a liquid crystal panel (12), a conveyor belt (31) for conveying the liquid crystal panel (12), and a suction and clamping assembly mechanism for adsorbing and conveying the liquid crystal panel (12). A glue application station (2) and an assembly station (3) are sequentially arranged on the side of the conveyor (1). A moving base (4) is slidably arranged on the conveyor (1). A positioning frame (41) is installed in the moving base (4). The backlight module (10) is placed in the positioning frame (41). A glue application mechanism is arranged at the glue application station (2), and the glue application mechanism is used to bond the frame-shaped adhesive (11) onto the backlight module (10). An installation shell (5) is installed above the assembly station (3). The conveyor belt (31) is located below the installation shell (5). A positioning plate (32) for guiding the liquid crystal panel (12) is installed on the conveyor belt (31). The suction and clamping assembly mechanism is arranged in the installation shell (5), and it is characterized in that, Further included are: A press-fitting assembly: The press-fitting assembly is arranged on the suction clip assembly mechanism; A conversion vacuum pumping assembly: The conversion vacuum pumping assembly is arranged on the suction clip assembly mechanism.

2. The assembling and fitting device for a liquid crystal display panel and a backlight module according to claim 1, wherein The glue pasting mechanism includes a mounting frame (21) and a telescopic positioning frame (22) mounted at the glue pasting station (2). The square-shaped glue (11) is slidably sleeved outside the output end of the telescopic positioning frame (22). An electric slide table is slidably connected to the mounting frame (21). A first cylinder (23) is installed at the bottom of the electric slide table. The output end of the first cylinder (23) is connected to an air extraction plate (24). A positioning table (241) matching the square-shaped glue (11) is formed at the bottom of the air extraction plate (24). A plurality of air suction holes (242) are formed inside the air extraction plate (24). The air suction holes (242) are arranged around the positioning table (241) and correspond to the position of the square-shaped glue (11). A positioning rod (243) is arranged on the lower side of the air extraction plate (24). A positioning hole (412) matching the positioning rod (243) is provided on the positioning frame (41).

3. The assembling and fitting device for a liquid crystal display panel and a backlight module according to claim 1, characterized in that, The square-shaped glue (11) is composed of a square-shaped glue frame (111) and release films (112) adhered to the upper and lower sides thereof. One end of the release film (112) is provided with a film tearing position. A film tearing assembly is provided on the moving base (4).

4. The assembly and fitting device for a liquid crystal display panel and a backlight module according to claim 3, characterized in that, The film tearing assembly includes a chute (42) formed on the moving base (4) and an inclined chute (411) arranged on one side of the positioning frame (41). The position of the inclined chute (411) corresponds to the film tearing position of the release film (112). An electric slider one (421) is slidably arranged in the chute (42). A micro telescopic cylinder (43) is installed inside the electric slider one (421). An air suction lever (44) is installed at the output end of the micro telescopic cylinder (43). An air suction nozzle is provided at the end of the air suction lever (44). The position of the air suction nozzle corresponds to the position of the inclined chute (411). In the initial state, the electric slider one (421) is located at one end of the chute (42) close to the inclined chute (411).

5. The assembling and fitting device for a liquid crystal display panel and a backlight module according to claim 4, characterized in that When the moving base (4) moves to the gluing station (2), the first cylinder (23) drives the air extraction plate (24) to move downward and suck the square adhesive (11). Then, it moves to directly above the moving base (4) through the electric slide table, first descends a certain height. The micro telescopic cylinder (43) drives the suction lever (44) to move upward to the height between the release films (112) on both sides of the square adhesive (11). Then, the first electric slider (421) is controlled to move towards the square adhesive (11). When it moves to the tearing position, the micro telescopic cylinder (43) moves downward to press the lower release film (112) and starts the suction nozzle to suck the tearing position of the lower release film (112). At this time, the first electric slider (421) is controlled to move to peel off the lower release film (112). After peeling, the first electric slider (421) and the micro telescopic cylinder (43) return to their original positions. Then, the first cylinder (23) is controlled to move downward to press and mount the square adhesive frame (111) on the backlight module (10) through the air extraction plate (24). Then, the air extraction plate (24) stops working, and the electric slide table and the first cylinder (23) return to their original positions. At this time, the tearing position of the upper release film (112) is located at the inclined groove (411). The first electric slider (421) is controlled to move towards the inclined groove (411), the suction nozzle is started to suck the tearing position of the upper release film (112), and the first electric slider (421) is controlled to move to peel off the upper release film (112). After peeling, the moving base (4) is moved to the assembly station (3) through the conveyor (1), and the peeled release film (112) is collected by an external manipulator.

6. The assembling and bonding device for a liquid crystal display panel and a backlight module according to claim 1, wherein, The suction and clamping assembly mechanism includes a connecting plate (7) and an electric slider two (51) slidably arranged in the mounting shell (5). The connecting plate (7) is hollow. A second cylinder (52) is installed on the lower side of the electric slider two (51). The output end of the second cylinder (52) is installed with a cover body (6). A plurality of suction pipe (73) are slidably and sealingly connected to the cover body (6). Suction cups are arranged at the bottom of the suction pipe (73). Upper retaining rings (731) and lower retaining rings (732) are respectively arranged on the outer side walls of the suction pipe (73). The upper retaining ring (731) is located above the cover body (6), and the lower retaining ring (732) is located below the cover body (6). The upper side wall of the lower retaining ring (732) is fixedly connected with a first spring (74). The upper end of the first spring (74) is fixedly connected with the bottom wall of the cover body (6). The tops of the plurality of suction pipe (73) are communicated with the inner cavity of the connecting plate (7). A suction port (72) is arranged at the top of the connecting plate (7). The end of the suction port (72) is connected to an external air extraction pump through a hose. In the initial state, the suction cup is below the lower end of the cover body (6), and a sealing gasket (61) is arranged at the lower end of the cover body (6).

7. The assembling and laminating device for a liquid crystal display panel and a backlight module according to claim 6, wherein The press-fitting assembly includes a connecting bottom plate (75) fixedly connected to the upper side wall of the lower retaining ring (732), a mounting box (78) fixedly connected to the inner top wall of the cover body (6), and a connecting channel (77) opened inside the cover body (6). A corrugated tube (751) is connected to the upper side of the connecting bottom plate (75), and the upper end of the corrugated tube (751) is connected to the inner top wall of the cover body (6). The connecting bottom plate (75), the corrugated tube (751), and the inner top wall of the cover body (6) enclose a sealed space. One end of the connecting channel (77) is located inside the mounting box (78), and the other end is located inside the sealed space. A plurality of second springs (781) are fixedly connected to the top wall of the mounting box (78), and a rubber block (782) is fixedly connected to the lower end of the second spring (781). The rubber block (782) is connected to the mounting box (78) in a limited sliding manner.

8. The assembling and fitting device for a liquid crystal display panel and a backlight module according to claim 7, characterized in that, The connecting bottom plate (75) is made of a hard material. The mounting box (78) and the rubber block (782) are both in a frame shape. The rubber block (782) is hermetically connected to the mounting box (78), and the position of the rubber block (782) corresponds to the upper mouth rubber frame (111) of the backlight module (10).

9. The assembling and laminating device for a liquid crystal display panel and a backlight module according to claim 6, wherein The conversion and vacuum pumping assembly includes a motor (8) installed on the top wall of the connecting plate (7), a conversion member (9) rotatably arranged inside the connecting plate (7), an inductor (76) fixedly installed on the top of the connecting bottom plate (75), and a plurality of connecting pipes (71) penetrating and connected to the side wall of the connecting plate (7). A jack (62) matching the connecting pipe (71) is opened inside the cover body (6). The output end of the motor (8) is located inside the connecting plate (7) and a gear (81) is fixedly connected thereto. The conversion member (9) is successively composed of a first sealing plate (91), a second sealing plate (92), and a gear ring (93) from bottom to top. The bottom of the first sealing plate (91) abuts against the bottom wall of the inner cavity of the connecting plate (7), the top of the gear ring (93) abuts against the top wall of the inner cavity of the connecting plate (7), the second sealing plate (92) abuts against the side wall of the inner cavity of the connecting plate (7), the gear (81) is meshed with the gear ring (93), and a vent hole (911) matching the suction cup pipe (73) is opened on the first sealing plate (91).

10. The assembling and fitting device for a liquid crystal display panel and a backlight module according to claim 9, characterized in that, The inductor (76) is a distance sensor. The inductor (76) is electrically connected to the motor (8). The distribution of the second sealing plate (92) matches the distribution of the connecting pipes (71). When the bottom of the sealing gasket (61) fits against the top wall of the moving base (4), the bottom of the suction cup and the bottom of the rubber block (782) both abut against the top wall of the liquid crystal panel (12). In the initial state, the position of the vent hole (911) corresponds to the suction cup pipe (73). The second sealing plate (92) blocks the end of the corresponding connecting pipe (71). When the bottom of the sealing gasket (61) fits against the top wall of the moving base (4), the top end of the suction cup pipe (73) is blocked by the first sealing plate (91), and the second sealing plate (92) no longer blocks the end of the corresponding connecting pipe (71).

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