LCD (Liquid Crystal Display) glass surface mounting device

Abstract

The invention discloses an LCD glass pasting device which comprises a rack, a supporting mechanism and a pressing mechanism, the supporting mechanism is arranged on the rack, and the supporting mechanism is used for bearing a polaroid and a glass sheet; the pressing mechanism comprises a support, a lifting assembly, a plurality of pressing heads and an adjusting assembly, the support is slidably connected to the rack in the height direction of the rack, the fixed end of the lifting assembly is connected to the rack, the movable end of the lifting assembly is connected to the support, the pressing heads are arranged on the support, and the fixed end of the adjusting assembly is connected to the support. The beneficial effects of the invention are that through the design of the plurality of pressure heads and the independent adjusting assembly, the pressure in the binding surface can be regulated and controlled in a partitioned manner, the scratch of the glass sheet and the damage of the polaroid caused by overlarge local pressure are reduced, the quality of the polaroid is improved, and the quality of the polaroid is improved. And the possibility of fitting gaps and bubbles caused by too small local pressure is reduced.

Description

Technical Field

[0001] This invention relates to the field of display manufacturing, and more specifically to an LCD glass mounting device. Background Technology

[0002] LCDs, with their advantages of high definition, low power consumption, and lightweight portability, are widely used in smartphones, tablets, laptops, LCD TVs, automotive displays, and many other fields. As display technology iterates towards higher resolution, larger sizes, narrower bezels, and greater flexibility, the requirements for assembly precision and production efficiency of LCD modules are constantly increasing. Among these, the bonding process between the LCD glass and components such as the backlight module, polarizer, and touch panel is the core process that determines the display effect, structural stability, and lifespan of the LCD product. The LCD glass bonding machine, as the core equipment in the bonding process, has the core function of precisely positioning and smoothly bonding the LCD glass to the target substrate, while ensuring that there are no bubbles, scratches, or misalignments during the bonding process.

[0003] Chinese utility model patent CN205202410U discloses an LCD display module reflector patch mounting machine, including a patch mounting mechanism and a reflector conveying mechanism. The patch mounting mechanism includes a base plate that can move back and forth, an adsorption plate that can move up and down and left and right above the base plate, an adsorption hole for adsorbing reflectors on the bottom side of the adsorption plate, and a pressing roller that can move up and down located in front of the adsorption plate.

[0004] The aforementioned technologies have the following drawbacks: using only a pressing roller to press the polarizer and the glass sheet results in uneven pressure distribution. Excessive local pressure can easily scratch the glass sheet, while insufficient local pressure can easily create gaps and air bubbles, affecting the display effect. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an LCD glass bonding device to solve the technical problem of uneven bonding pressure distribution in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention provides an LCD glass bonding device, including a frame; A support mechanism, mounted on a frame, is used to support the polarizer and the glass sheet; and, The pressing mechanism includes a support, a lifting assembly, multiple pressing heads, and an adjusting assembly. The support is slidably connected to the frame along the height direction of the frame. The fixed end of the lifting assembly is connected to the frame, and the movable end of the lifting assembly is connected to the support. The multiple pressing heads are disposed on the support. The fixed end of the adjusting assembly is connected to the support, and the movable end of the adjusting assembly is connected to the pressing heads. The adjusting assembly is used to independently adjust the pressure of the multiple pressing heads.

[0007] In some embodiments, the lifting assembly includes a guide rail and a first cylinder. The guide rail is connected to the frame, the bracket is slidably connected to the guide rail, the first cylinder is mounted on the guide rail, and the piston rod of the first cylinder is connected to the bracket.

[0008] In some embodiments, the adjustment assembly includes a pressure sensor, a first telescopic rod, a first spring, a pressure block, and a second cylinder. Multiple first telescopic rods are connected to a bracket. The pressure head is connected to the end of the first telescopic rod. The first spring is sleeved on the first telescopic rod. The pressure block is slidably connected to the first telescopic rod. The bottom end of the first spring abuts against the pressure head, and the top end of the first spring abuts against the pressure block. The second cylinder is mounted on the bracket, and the piston rod of the second cylinder is connected to the pressure block. The pressure sensor is mounted on the pressure head.

[0009] In some embodiments, the pressing mechanism further includes a buffer layer connected to the press head.

[0010] In some embodiments, the patch assembly further includes a pre-pressing mechanism, which includes a glue roller, a base, a slide rail, and a third cylinder. The slide rail is connected to a bracket, the base is slidably connected to the slide rail, the third cylinder is mounted on the bracket, the piston rod of the third cylinder is connected to the base, and the glue roller is rotatably connected to the base.

[0011] In some embodiments, the pre-compression mechanism further includes a second telescopic rod and a second spring. The two second telescopic rods are connected to the base, and the rubber roller is rotatably connected between the two second telescopic rods. The second spring is sleeved on the second telescopic rod, with one end of the second spring connected to the second telescopic rod and the other end of the second spring connected to the base.

[0012] In some embodiments, the support mechanism includes a support platform and suction heads, the support platform being mounted on a frame, and a plurality of suction head arrays being connected to the support platform.

[0013] In some embodiments, the patching device further includes a defoaming mechanism, which includes a sealing ring and a vacuum pump. The sealing ring is connected to a bracket. When the pressure head abuts against the polarizer and the glass plate, the sealing ring abuts against the support. A cavity is formed between the bracket, the support, and the sealing ring. The inlet of the vacuum pump is connected to the cavity.

[0014] In some embodiments, the defoaming mechanism further includes a filter screen disposed at the outlet of the vacuum pump.

[0015] In some embodiments, the defoaming mechanism further includes an air curtain machine with its outlet facing the filter screen, and the air curtain machine is activated when the vacuum pump is depressurized.

[0016] Compared with the prior art, the beneficial effects of the present invention include: through the design of multiple pressure heads and independent adjustment components, the pressure within the bonding surface can be controlled in zones, reducing the possibility of glass scratches and polarizer breakage caused by excessive local pressure, as well as bonding gaps and air bubbles caused by insufficient local pressure. Attached Figure Description

[0017] Figure 1 This is a first-view overall structural schematic diagram of the patch device provided by the present invention; Figure 2 This is a second-view overall structural schematic diagram of the patch device provided by the present invention; Figure 3 This is a cross-sectional view of the overall structure of the pressing mechanism provided by the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Frame; 2. Support mechanism; 21. Support platform; 22. Suction head; 3. Pressing mechanism; 31. Bracket; 32. Lifting assembly; 321. Guide rail; 322. First cylinder; 33. Press head; 34. Adjustment assembly; 341. Pressure sensor; 342. First telescopic rod; 343. First spring; 344. Pressing block; 345. Second cylinder; 35. Buffer layer; 4. Pre-pressing mechanism; 41. Rubber roller; 42. Base; 43. Slide rail; 44. Third cylinder; 45. Second telescopic rod; 46. Second spring; 5. Defoaming mechanism; 51. Sealing ring; 52. Vacuum pump; 53. Filter screen; 54. Air curtain machine. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] This invention provides an LCD glass patch device, the structure of which is as follows: Figure 1 - Figure 3 As shown, it includes a frame 1, a support mechanism 2, and a pressing mechanism 3.

[0021] The support mechanism 2 is mounted on the frame 1 and is used to support the polarizer and the glass sheet.

[0022] The pressing mechanism 3 includes a bracket 31, a lifting assembly 32, multiple pressing heads 33, and an adjusting assembly 34. The bracket 31 is slidably connected to the frame 1 along the height direction of the frame 1. The fixed end of the lifting assembly 32 is connected to the frame 1, and the movable end of the lifting assembly 32 is connected to the bracket 31. The multiple pressing heads 33 are disposed on the bracket 31. The fixed end of the adjusting assembly 34 is connected to the bracket 31, and the movable end of the adjusting assembly 34 is connected to the pressing heads 33. The adjusting assembly 34 is used to independently adjust the pressure of the multiple pressing heads 33.

[0023] In use, the support mechanism 2 is fixed on the frame 1, serving as the bearing reference surface for the polarizer and the glass sheet. First, the glass sheet is placed stably on the surface of the support mechanism 2, and the vacuum adsorption function is activated to prevent displacement of the glass sheet during pressing. Then, the polarizer is precisely aligned with the bonding position of the glass sheet, completing the pre-positioning pre-processing before bonding. After bonding is initiated, the control system instructs the lifting component 32 to move, and its movable end drives the bracket 31 to descend smoothly along the height direction of the frame 1. Before the pressure head 33 contacts the polarizer, the system presets the bonding area and material characteristics of the glass sheet and the polarizer. The target pressure value of each pressure head 33 is set. After the pressure head 33 contacts the polarizer, each adjustment component 34 collects the pressure feedback data of the pressure head 33 in real time and dynamically fine-tunes it according to the preset target value: for the easily damaged edge of the glass sheet, the pressure of the corresponding pressure head 33 is reduced; for the center area where gaps are easily generated, the pressure of the corresponding pressure head 33 is increased to ensure that the pressure distribution is accurately matched with the bonding requirements of different areas. After the pressure of each pressure head 33 is adjusted to the appropriate level, the lifting component 32 continues to apply a stable downward driving force to drive multiple pressure heads 33 to press the polarizer and the glass sheet together.

[0024] In this invention, the design of multiple pressure heads 33 and independent adjustment components 34 enables zoned control of the pressure within the bonding surface, reducing the possibility of glass scratches and polarizer breakage caused by excessive local pressure, as well as bonding gaps and air bubbles caused by insufficient local pressure.

[0025] To drive the pressure head 33 to rise and fall, please refer to... Figure 1 In a preferred embodiment, the lifting assembly 32 includes a guide rail 321 and a first cylinder 322. The guide rail 321 is connected to the frame 1, the bracket 31 is slidably connected to the guide rail 321, the first cylinder 322 is mounted on the guide rail 321, and the piston rod of the first cylinder 322 is connected to the bracket 31.

[0026] When in use, after the bonding is started, the system sends a downward command to the first cylinder 322. The piston rod of the first cylinder 322 extends at a constant speed, driving the bracket 31 to slide vertically downward along the guide rail 321. The precise cooperation between the guide rail 321 and the slider ensures that the bracket 31 is free from deviation and shaking during the lifting process, and ensures the parallelism between the multi-pressure head 33 and the bonding surface.

[0027] To adjust the pressure of pressure head 33 in different zones, please refer to... Figure 3 In a preferred embodiment, the adjustment assembly 34 includes a pressure sensor 341, a first telescopic rod 342, a first spring 343, a pressure block 344, and a second cylinder 345. Multiple first telescopic rods 342 are connected to a bracket 31. A pressure head 33 is connected to the end of the first telescopic rod 342. The first spring 343 is sleeved on the first telescopic rod 342. The pressure block 344 is slidably connected to the first telescopic rod 342. The bottom end of the first spring 343 abuts against the pressure head 33, and the top end of the first spring 343 abuts against the pressure block 344. The second cylinder 345 is mounted on the bracket 31, and the piston rod of the second cylinder 345 is connected to the pressure block 344. The pressure sensor 341 is mounted on the pressure head 33.

[0028] During operation, the system sends pressure adjustment commands to each of the second cylinders 345. The piston rods of the second cylinders 345 extend, pushing the pressure block 344 to slide downwards along the first telescopic rod 342. The pressure block 344 compresses the first spring 343, and the elastic force generated by the spring's elastic deformation is transmitted to the pressure head 33. The pressure sensor 341 built into the pressure head 33 collects the actual pressure data in real time and dynamically feeds it back to the system: if the actual pressure is lower than the preset value, the system commands the corresponding second cylinder 345 to continue extending, increasing the spring compression to enhance the elastic force; if the actual pressure is higher than the preset value, the system commands the second cylinder 345 to retract slightly, reducing the spring compression, until the pressure of all pressure heads 33 precisely matches the preset value. After the pressure of all pressure heads 33 is adjusted to the correct level, the system commands the first cylinder 322 to restart and continue downwards, providing a stable pressing driving force, while all adjustment components 34 continue to operate. Pressure sensor 341 monitors pressure fluctuations in real time. If pressure deviation is caused by minor unevenness on the workpiece surface, the system immediately instructs the corresponding second cylinder 345 to make a fine adjustment. The pressure is compensated by the dynamic adjustment of the spring force to maintain the pressure stability in each area.

[0029] To further improve the uniformity of pressure distribution, please refer to... Figure 3 In a preferred embodiment, the pressing mechanism 3 further includes a buffer layer 35, which is connected to the pressing head 33.

[0030] During use, the surfaces of the glass sheet and polarizer have microscopic irregularities. Without the buffer layer 35, the pressure head 33 can only contact the raised parts of the workpiece surface, causing pressure to concentrate in a localized area, which easily leads to bonding gaps and air bubbles. The buffer layer 35 has elastic deformation capability and can adaptively fill the microscopic depressions on the workpiece surface after being pressed, so that the pressure of the pressure head 33 can be evenly transmitted to the entire bonding surface through the buffer layer 35.

[0031] To achieve pre-compression, please refer to... Figure 2In a preferred embodiment, the patching device further includes a pre-pressing mechanism 4, which includes a glue roller 41, a base 42, a slide rail 43, and a third cylinder 44. The slide rail 43 is connected to the bracket 31, the base 42 is slidably connected to the slide rail 43, the third cylinder 44 is mounted on the bracket 31, the piston rod of the third cylinder 44 is connected to the base 42, and the glue roller 41 is rotatably connected to the base 42.

[0032] During use, after the glass sheet and polarizer are bonded together, the pre-pressure is initiated. The system instructs the lifting assembly 32 to drive the bracket 31 downward, which in turn drives the pre-pressure mechanism 4 to descend synchronously, so that the lower end face of the rubber roller 41 contacts the surface of the polarizer. The system sends a drive command to the third cylinder 44, and the piston rod of the third cylinder 44 extends at a constant speed, pushing the base 42 to slide horizontally along the slide rail 43. The base 42 drives the rubber roller 41 to roll along the length of the bonding surface. During the rolling process, the rubber roller 41 applies uniform pre-pressure to initially press the polarizer and glass sheet together, squeezing out large free air bubbles between them along the rolling direction, and at the same time flattening the surface of the polarizer to avoid bonding defects caused by too many air bubbles or wrinkles in the polarizer during the main pressing.

[0033] To adaptively compensate for thickness tolerances, please refer to... Figure 2 In a preferred embodiment, the pre-compression mechanism 4 further includes a second telescopic rod 45 and a second spring 46. The two second telescopic rods 45 are connected to the base 42. The rubber roller 41 is rotatably connected between the two second telescopic rods 45. The second spring 46 is sleeved on the second telescopic rod 45. One end of the second spring 46 is connected to the second telescopic rod 45, and the other end of the second spring 46 is connected to the base 42.

[0034] During use, different batches of glass sheets and polarizers have thickness tolerances. The second telescopic rod 45 provides precise vertical guidance for the rubber roller 41, and the second spring 46 can automatically extend and retract according to the thickness tolerance of the workpiece. The elastic force compensates for the thickness deviation, ensuring that the pre-pressure of the rubber roller 41 on workpieces of different thicknesses is always stable within the optimal range.

[0035] To support the glass slide, please refer to... Figure 2 In a preferred embodiment, the support mechanism 2 includes a support platform 21 and suction heads 22. The support platform 21 is disposed on the frame 1, and a plurality of suction heads 22 are arrayed and connected to the support platform 21.

[0036] In operation, the automated feeding mechanism smoothly places the glass sheet to be bonded onto the bearing surface of the support 21. The vision positioning component quickly identifies the size and edge position of the glass sheet and uploads the data to the system controller. Based on the size of the glass sheet, the controller instructs the solenoid valve in the corresponding area to open. After the suction head 22 opens, air is extracted between the suction head 22 and the glass sheet through the vacuum tube, creating negative pressure and firmly adsorbing the glass sheet onto the surface of the support 21. The vision positioning component guides the polarizer to precisely align with the bonding area of ​​the glass sheet, completing the positioning pre-processing before bonding.

[0037] To eliminate air bubbles between the polarizer and the glass plate, please refer to... Figure 3 In a preferred embodiment, the patch device further includes a defoaming mechanism 5, which includes a sealing ring 51 and a vacuum pump 52. The sealing ring 51 is connected to the bracket 31. When the pressure head 33 abuts against the polarizer and the glass plate, the sealing ring 51 abuts against the support 21. A cavity is formed between the bracket 31, the support 21 and the sealing ring 51. The inlet of the vacuum pump 52 is connected to the cavity.

[0038] During use, when the lower end face of the pressure head 33 abuts against the surface of the polarizer, the sealing ring 51 on the bracket 31 simultaneously abuts against the edge of the bearing surface of the support 21, forming a sealed cavity consisting of the bracket 31, the sealing ring 51, the support 21, and the workpiece, ensuring the cavity's airtightness. The system commands the vacuum pump 52 to start, drawing air from the sealed cavity through the pipeline, creating a negative pressure environment within the cavity; residual microbubbles on the bonding surface expand and converge under the negative pressure, and are simultaneously discharged towards the edge of the bonding surface under the pressure of the pressure head 33.

[0039] To improve the cleanliness of the cavity, please refer to... Figure 3 In a preferred embodiment, the defoaming mechanism 5 further includes a filter screen 53, which is disposed at the outlet of the vacuum pump 52.

[0040] When in use, filter 53 can form a one-way filtration barrier when vacuum pump 52 stops, blocking the backflow path of impurities and ensuring that the cavity always maintains a clean negative pressure environment.

[0041] To further improve the cleanliness of the cavity, please refer to... Figure 3 In a preferred embodiment, the defoaming mechanism 5 further includes an air curtain machine 54, the outlet of which faces the filter screen 53, and the air curtain machine 54 is activated when the vacuum pump 52 is depressurized.

[0042] When the vacuum pump 52 stops and depressurizes, the negative pressure in the cavity returns to normal pressure, which can easily cause reverse airflow. This may bring back the adhesive residue and dust trapped on the surface of the filter screen 53, or a small amount of oil from the vacuum pump 52, into the sealed cavity, contaminating the polarizer and glass plate surfaces. After the air curtain machine 54 starts, it sprays a uniform high-pressure airflow onto the surface of the filter screen 53, forming a positive pressure airflow barrier between the filter screen 53 and the vacuum pump 52 pipeline, blocking the flow path of the reverse airflow and completely preventing impurities from flowing back into the cavity.

[0043] To better understand this invention, the following is combined with... Figure 1 - Figure 3 The working principle of an LCD glass bonding device according to the present invention is described in detail as follows: The support mechanism 2 is fixed on the frame 1 and serves as the bearing reference surface for the polarizer and the glass sheet. First, the glass sheet is placed stably on the surface of the support mechanism 2, and the vacuum adsorption function is activated to prevent the glass sheet from shifting during the pressing process. Then, the polarizer is precisely aligned with the bonding position of the glass sheet to complete the positioning pre-processing before bonding. After bonding is started, the control system commands the lifting component 32 to move, and its movable end drives the bracket 31 to descend smoothly along the height direction of the frame 1. Before the pressure head 33 contacts the polarizer, the system determines the bonding position of the glass sheet and the polarizer. Based on the bonding area and material characteristics, the target pressure value of each area's pressure head 33 is preset. After the pressure head 33 contacts the polarizer, each adjustment component 34 collects the pressure feedback data of the pressure head 33 in real time and dynamically fine-tunes it according to the preset target value: for areas where the glass sheet is easily damaged at the edge, the pressure of the corresponding pressure head 33 is reduced; for areas in the center where gaps are easily generated, the pressure of the corresponding pressure head 33 is increased to ensure that the pressure distribution is accurately matched with the bonding requirements of different areas. After the pressure of each pressure head 33 is adjusted to the appropriate level, the lifting component 32 continues to apply a stable downward driving force, driving multiple pressure heads 33 to collaboratively press the polarizer and the glass sheet together.

[0044] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An LCD glass mounting device, characterized in that, include: frame; A support mechanism is mounted on a frame and is used to support the polarizer and the glass sheet. as well as, The pressing mechanism includes a support, a lifting assembly, multiple pressing heads, and an adjusting assembly. The support is slidably connected to the frame along the height direction of the frame. The fixed end of the lifting assembly is connected to the frame, and the movable end of the lifting assembly is connected to the support. The multiple pressing heads are disposed on the support. The fixed end of the adjusting assembly is connected to the support, and the movable end of the adjusting assembly is connected to the pressing heads. The adjusting assembly is used to independently adjust the pressure of the multiple pressing heads.

2. The LCD glass bonding device according to claim 1, characterized in that, The lifting assembly includes a guide rail and a first cylinder. The guide rail is connected to the frame, the bracket is slidably connected to the guide rail, the first cylinder is mounted on the guide rail, and the piston rod of the first cylinder is connected to the bracket.

3. The LCD glass bonding device according to claim 1, characterized in that, The adjustment assembly includes a pressure sensor, a first telescopic rod, a first spring, a pressure block, and a second cylinder. Multiple first telescopic rods are connected to a bracket. The pressure head is connected to the end of the first telescopic rod. The first spring is sleeved on the first telescopic rod. The pressure block is slidably connected to the first telescopic rod. The bottom end of the first spring abuts against the pressure head, and the top end of the first spring abuts against the pressure block. The second cylinder is mounted on the bracket, and the piston rod of the second cylinder is connected to the pressure block. The pressure sensor is mounted on the pressure head.

4. The LCD glass bonding device according to claim 3, characterized in that, The pressing mechanism also includes a buffer layer, which is connected to the pressing head.

5. An LCD glass bonding device according to claim 1, characterized in that, The patch assembly also includes a pre-pressing mechanism, which includes a rubber roller, a base, a slide rail, and a third cylinder. The slide rail is connected to a bracket, the base is slidably connected to the slide rail, the third cylinder is mounted on the bracket, the piston rod of the third cylinder is connected to the base, and the rubber roller is rotatably connected to the base.

6. An LCD glass bonding device according to claim 5, characterized in that, The pre-compression mechanism also includes a second telescopic rod and a second spring. The two second telescopic rods are connected to the base. The rubber roller is rotatably connected between the two second telescopic rods. The second spring is sleeved on the second telescopic rod. One end of the second spring is connected to the second telescopic rod, and the other end of the second spring is connected to the base.

7. An LCD glass mounting device according to claim 1, characterized in that, The support mechanism includes a support platform and suction heads. The support platform is mounted on the frame, and the array of multiple suction heads is connected to the support platform.

8. An LCD glass bonding device according to claim 7, characterized in that, The patch assembly also includes a defoaming mechanism, which includes a sealing ring and a vacuum pump. The sealing ring is connected to a bracket. When the pressure head abuts against the polarizer and the glass plate, the sealing ring abuts against the support. A cavity is formed between the bracket, the support, and the sealing ring. The inlet of the vacuum pump is connected to the cavity.

9. An LCD glass bonding device according to claim 8, characterized in that, The defoaming mechanism also includes a filter screen, which is located at the outlet of the vacuum pump.

10. An LCD glass bonding device according to claim 9, characterized in that, The defoaming mechanism also includes an air curtain machine, the outlet of which faces the filter screen, and the air curtain machine is activated when the vacuum pump is depressurized.

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