Liquid crystal display polarizing plate defoaming device and working method thereof

Abstract

The present application belongs to the field of liquid crystal display screen preparation equipment, and particularly relates to a liquid crystal display screen defoaming device with a polarizing plate, and especially relates to a liquid crystal display screen polarizing plate defoaming device and a working method thereof. The defoaming mechanism of the liquid crystal display screen polarizing plate defoaming device comprises a bottom plate, a top plate and a sealing ring. The outer wall of the sealing ring is provided with a threaded groove, and the top of the outer wall of the first mounting groove extends inwardly to form a snap ring matched with the threaded groove. By arranging the threaded groove on the outer wall of the sealing ring and extending the snap ring matched with the threaded groove inwardly on the top of the outer wall of the first mounting groove, when the top plate is separated from the bottom plate, the snap ring will hook the threaded groove on the outer wall of the sealing ring to form mechanical interlocking, overcoming the problem of the falling of the sealing ring caused by the opening of the cavity for taking out the material after the defoaming of the liquid crystal display screen, and reducing the frequency of equipment downtime and maintenance cost caused by the falling of the sealing ring.

Description

Technical Field

[0001] This invention belongs to the field of liquid crystal display manufacturing equipment, specifically relating to equipment for debubbling liquid crystal displays with bonded polarizers, and more particularly to a liquid crystal display polarizer debubbling equipment and its working method. Background Technology

[0002] Liquid crystal displays (LCDs) are indispensable core components of modern electronic devices, and their display performance and quality are of paramount importance. Polarizing films are a key component in the manufacturing process of LCDs. After the polarizing film is bonded to the LCD glass substrate, micro-bubbles are easily generated at the bonding interface due to bonding processes or material characteristics. These bubbles not only affect the visual effect of the display, causing defects such as bright spots, dark spots, or rainbow patterns, but also significantly reduce product yield and long-term reliability. Therefore, efficient and thorough debubbling treatment of the bonded polarizing film is a crucial step in improving the quality of LCDs.

[0003] In related technologies, vacuum degassing is the mainstream technique for removing air bubbles between the bonding layers of polarizers. This technique typically involves placing the LCD screen with the polarizer bonded inside a sealed vacuum chamber, creating a negative pressure environment by evacuating the chamber. Under this negative pressure, the air bubbles between the bonding layers expand and escape, thus eliminating the bubbles. However, existing vacuum degassing equipment still has significant shortcomings in practical applications, especially in its core sealing structure, which restricts further improvements in production efficiency and product quality. These shortcomings are mainly reflected in the following two aspects:

[0004] First, the problem of easily detached sealing rings: During the opening and unloading stage after degassing, when separating the top and bottom plates that constitute the vacuum chamber, due to the vacuum suction force and friction or possible adhesion between the sealing ring and the mounting groove on the top plate, the sealing ring is easily pulled away from its original position in the mounting groove on the bottom plate, or even completely detached. This requires stopping the machine for manual repositioning or replacement of the sealing ring, severely impacting the continuous operating efficiency of the equipment, increasing maintenance costs, and potentially causing damage to the sealing ring through repeated pulling, shortening its service life. Frequent sealing ring detachment has become one of the bottlenecks to stable equipment operation.

[0005] Secondly, there is the problem of sealing ring deformation and failure: To achieve a reliable vacuum seal, the sealing ring must be fully compressed when the chamber closes. However, traditional sealing structure designs often result in the sealing ring being subjected to excessive or uneven compressive stress. On the one hand, excessive compression accelerates the aging and permanent deformation (plastic deformation) of the sealing ring material (such as rubber), causing it to lose its elastic recovery ability, leading to a decrease in sealing effect upon subsequent closure and an inability to maintain the required vacuum level. On the other hand, uneven compression may cause localized stress concentration in the sealing ring, which will also accelerate deformation and failure. Once the sealing ring undergoes irreversible deformation, its sealing performance cannot be guaranteed, requiring replacement and increasing consumable costs and downtime. Simultaneously, poor sealing directly affects the degassing effect, resulting in incomplete bubble removal.

[0006] Therefore, how to reduce the deformation of the sealing ring while avoiding its detachment due to opening the cavity for material removal after the liquid crystal display screen is defoaming is a technical problem that urgently needs to be solved.

[0007] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0008] This disclosure provides at least one embodiment of a liquid crystal display screen polarizer debubbling device and its working method.

[0009] In a first aspect, embodiments of this disclosure provide a liquid crystal display screen polarizer debubbling device, comprising:

[0010] Work platform;

[0011] The feeding mechanism is installed on the working platform;

[0012] A robotic arm is mounted on the work platform and is used to grasp the liquid crystal display screen with polarizer attached in the feeding mechanism.

[0013] A debubbling mechanism is provided on the working platform and is used to debubble the liquid crystal display screen to which the polarizer is bonded.

[0014] The unloading conveyor belt is used to transport the defoamed liquid crystal display screen with polarizing film bonded to it, which is taken out by the robotic arm.

[0015] The defoaming mechanism includes:

[0016] The base plate has a first groove in the middle of its top surface for placing a liquid crystal display screen with a polarizer attached thereon, and the top surface of the base plate has a first mounting groove surrounding the first groove.

[0017] The top plate has a second groove adapted to the first groove in the middle of its bottom surface and covers the bottom plate. The bottom surface of the top plate is provided with a second mounting groove at the place where it is adapted to the first mounting groove.

[0018] A sealing ring is disposed in the first mounting groove, and the upper end of the sealing ring extends out from the first mounting groove to be inserted into the second mounting groove;

[0019] The outer wall of the sealing ring is provided with a threaded groove, and a retaining ring that matches the threaded groove extends inward from the top of the outer wall of the first mounting groove to prevent the sealing ring from being pulled out when the top plate separates from the bottom plate.

[0020] In an optional embodiment, when the top plate and the bottom plate are closed, the distance between the bottom of the first mounting groove and the bottom of the second mounting groove is H1.

[0021] The height of the sealing ring is H2;

[0022] Where H1 > H2, and the units of H1 and H2 are mm.

[0023] In one optional embodiment, the number of threaded grooves of the sealing ring is multiple;

[0024] The plurality of the threaded grooves are spaced apart circumferentially along the sealing ring.

[0025] In an optional embodiment, the degassing mechanism further includes a vacuum tube disposed on the top of the top plate and communicating with the second groove;

[0026] During the degassing process, a robotic arm places the liquid crystal display screen with the polarizer attached into the first groove, and then the top plate covers the bottom plate. The first groove and the second groove are pressurized by a vacuum tube to expel the air bubbles from the liquid crystal display screen with the polarizer attached after the film is applied.

[0027] When the top plate and the bottom plate are separated during material handling, the sealing ring is engaged with the threaded groove of the sealing ring to prevent the sealing ring from detaching from the first groove. Then, the liquid crystal display screen with the polarizer attached is removed by the robotic arm and placed into the unloading conveyor belt for conveying.

[0028] In an optional embodiment, the degassing mechanism further includes:

[0029] Press-fit components;

[0030] The pressing assembly is disposed above the top plate and is used to cover or separate the top plate from the bottom plate.

[0031] In one alternative embodiment, the pressing assembly includes:

[0032] A pressing plate is disposed on top of the top plate and connected to the top plate;

[0033] A support frame is disposed above the top plate;

[0034] A pressing cylinder is disposed at the top of the support frame, and the piston rod of the pressing cylinder passes through the support frame and is connected to the pressing plate;

[0035] The pressing plate is used to drive the top plate away from the bottom plate or cover the bottom plate under the drive of the pressing cylinder.

[0036] In an optional embodiment, the degassing mechanism further includes:

[0037] Translation components;

[0038] The translation component is disposed below the base plate and is used to pull the base plate out from the bottom of the top plate or send it into the bottom of the top plate.

[0039] In one alternative embodiment, the translation component includes:

[0040] Support plate;

[0041] A slide rail is provided on the support plate;

[0042] A slider is slidably mounted on the slide rail, and the top of the slider is connected to the bottom surface of the base plate;

[0043] A translation cylinder, whose piston rod is connected to the slider, is used to drive the slider to slide on the slide rail, so as to drive the bottom plate to be pulled out from the bottom of the top plate or sent into the bottom of the top plate.

[0044] In one optional embodiment, the number of the degassing mechanisms is multiple;

[0045] Multiple debubbling mechanisms are arranged around the robotic arm.

[0046] Secondly, this disclosure also provides a method for operating a liquid crystal display polarizer debubbling device as described above, the method comprising:

[0047] The robotic arm picks up the LCD screen with the polarizer attached from the feeding mechanism and places it into the debubbling mechanism;

[0048] The top plate covers the bottom plate, so that the upper end of the sealing ring extends out from the first mounting groove and is inserted into the second mounting groove to seal the gap between the first groove and the second groove.

[0049] The debubbling mechanism debubbles the liquid crystal display screens in the first and second grooves where polarizers are bonded.

[0050] The top plate and bottom plate are separated. The robotic arm removes the LCD screen with the polarizer attached from the first groove and places it into the feeding conveyor belt.

[0051] The beneficial effects of this invention are that it provides a debubbling device for liquid crystal display polarizers and its operating method. By providing a threaded groove on the outer wall of the sealing ring and extending an inwardly compatible retaining ring from the top of the outer wall of the first mounting groove, the retaining ring hooks onto the threaded groove on the outer wall of the sealing ring when the top plate and bottom plate separate, forming a mechanical interlock. This overcomes the problem of the sealing ring falling off after the liquid crystal display is debubbled and the cavity is opened for material removal, reducing the frequency of equipment downtime and maintenance costs caused by sealing ring falling off, improving the continuous operation stability and production efficiency of the equipment, and extending the service life of the sealing ring. Furthermore, during disassembly and assembly, simply twisting the sealing ring can release the interference fit with the first mounting groove or achieve an interference fit, avoiding excessive pressure on the sealing ring caused by pressing in related technologies and reducing the deformation of the sealing ring.

[0052] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0053] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0054] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the structure of the liquid crystal display screen polarizer debubbling device provided in an embodiment of the present invention;

[0056] Figure 2 This is a cross-sectional view of the degassing mechanism provided in an embodiment of the present invention;

[0057] Figure 3 This is a schematic diagram of the structure of the sealing ring provided in an embodiment of the present invention;

[0058] Figure 4This is a top view of the sealing ring provided in an embodiment of the present invention;

[0059] Figure 5 This is a partial structural schematic diagram of the degassing mechanism provided in an embodiment of the present invention;

[0060] Figure 6 This is a flowchart illustrating the working method of the liquid crystal display screen polarizer debubbling device provided in an embodiment of the present invention.

[0061] In the diagram: 100, working platform; 200, feeding mechanism; 300, robotic arm; 400, degassing mechanism; 410, base plate; 411, first groove; 412, first mounting groove; 413, retaining ring; 420, top plate; 421, second groove; 422, second mounting groove; 430, sealing ring; 431, threaded groove; 440, vacuum tube; 450, pressing assembly; 451, pressing plate; 452, support frame; 453, pressing cylinder; 460, translation assembly; 461, support plate; 462, slide rail; 463, slider; 464, translation cylinder; 500, unloading conveyor belt; 600, LCD display screen. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0063] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0064] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0065] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0066] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0067] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0068] Research has found that in degassing equipment using related technologies, the sealing ring is easily pulled out during the opening and material removal process. The sealing ring is damaged by repeated pulling, shortening its service life and resulting in poor equipment operation stability. At the same time, the use of interference compression will shorten the overall life of the sealing ring, leading to a decrease in the sealing effect when closing the device, making it impossible to maintain the required vacuum level, thus affecting the degassing effect.

[0069] Based on the above research, this invention provides a debubbling device for a liquid crystal display polarizer and its operating method. A threaded groove 431 is formed on the side wall of the sealing ring 430, and a retaining ring 413 is provided to cooperate with it. The retaining ring 413 hooks onto the threaded groove 431 on the outer wall of the sealing ring 430, forming a mechanical interlock. This prevents the sealing ring 430 from being pulled out, reducing the frequency of equipment downtime and maintenance costs caused by the sealing ring 430 falling off. Simultaneously, during disassembly and assembly, simply twisting the sealing ring is sufficient to release the interference fit with the first mounting groove or achieve an interference fit, avoiding excessive pressure on the sealing ring using a pressing method in related technologies and reducing the deformation of the sealing ring.

[0070] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0071] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0072] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0073] Please see Figure 1 and Figure 2 At least one embodiment provides a liquid crystal display screen polarizer debubbling device, comprising: a working platform 100; a feeding mechanism 200 disposed on the working platform 100; a robotic arm 300 disposed on the working platform 100 and used to grasp a liquid crystal display screen 600 with polarizer attached from the feeding mechanism 200; a debubbling mechanism 400 disposed on the working platform 100 and used to debubble the liquid crystal display screen 600 with polarizer attached; and a discharge conveyor belt 500 used to transport the debubbled liquid crystal display screen 600 with polarizer attached taken out by the robotic arm 300.

[0074] The debubbling mechanism 400 includes: a base plate 410, the center of which has a first groove 411 for placing a liquid crystal display screen 600 with a polarizer attached, and the top surface of the base plate 410 has a first mounting groove 412 surrounding the first groove; and a top plate 420, the center of which has a second groove 421 adapted to the first groove 411 and covering the base plate 410, and the bottom surface of the top plate 420 having a second mounting groove 421 at the fitting point of the first mounting groove 412. The mounting groove 422; a sealing ring 430 is disposed in the first mounting groove 412, and the upper end of the sealing ring 430 extends out of the first mounting groove 412 to be inserted into the second mounting groove 422; the outer wall of the sealing ring 430 is provided with a threaded groove 431, and a retaining ring 413 adapted to the threaded groove 431 extends inward from the top of the outer wall of the first mounting groove 412 to prevent the sealing ring 430 from being pulled out when the top plate 420 is separated from the bottom plate 410.

[0075] By providing a threaded groove 431 on the outer wall of the sealing ring 430, and extending an inwardly compatible retaining ring 413 from the top of the outer wall of the first mounting groove 412, when the top plate 420 separates from the bottom plate 410, the retaining ring 413 hooks onto the threaded groove 431 on the outer wall of the sealing ring 430, forming a mechanical interlock. This overcomes the problem of the sealing ring falling off due to opening the cavity for material removal after the liquid crystal display screen defoaming, reduces the frequency of equipment downtime and maintenance costs caused by the sealing ring 430 falling off, improves the continuous operation stability and production efficiency of the equipment, and extends the service life of the sealing ring 430. Simultaneously, during disassembly and assembly, simply twisting the sealing ring can release the interference fit with the first mounting groove or achieve an interference fit, avoiding excessive pressure on the sealing ring using a pressing method in related technologies and reducing the deformation of the sealing ring.

[0076] It should be noted that the interference fit between the threaded groove 431 of the sealing ring 430 and the retaining ring of the first mounting groove 412 reduces the deformation of the sealing ring 430 in the axial direction, thereby extending the service life of the sealing ring 430.

[0077] Please see Figure 2 When the top plate 420 and the bottom plate 410 are closed, the distance between the bottom of the first mounting groove 412 and the bottom of the second mounting groove 422 is H1; the height of the sealing ring 430 is H2; wherein, H1 > H2, and the units of H1 and H2 are mm.

[0078] When the top plate 420 and the bottom plate 410 are in the closed state, the distance H1 between the bottom of the first mounting groove 412 and the bottom of the second mounting groove 422 is greater than the height H2 of the sealing ring 430 itself (i.e., H1>H2). This ensures that when the sealing ring 430 is under pressure, its upper end is inserted into the second mounting groove 422 to achieve a seal, while avoiding contact between the top of the sealing ring 430 and the bottom of the second mounting groove 422. This avoids the problems of plastic deformation, loss of elasticity, and accelerated aging of the sealing ring 430 caused by excessive or uneven compression in the sealing structure of related technologies. The sealing ring 430 always works within its elastic deformation range, which significantly improves its sealing reliability and service life, reduces poor degassing caused by sealing failure and the frequency of replacement of the sealing ring 430, and ensures the quality of degassing.

[0079] Please see Figure 3 and Figure 4 The sealing ring 430 has multiple threaded grooves 431; the multiple threaded grooves 431 are arranged at intervals along the circumference of the sealing ring 430.

[0080] Multiple threaded grooves 431 are distributed circumferentially, increasing the hooking points of the retaining ring 413, improving the uniformity of interlocking, and preventing the sealing ring 430 from being pulled out by the top plate 420. Simultaneously, the circumferential spacing design disperses stress, reducing localized wear on the sealing ring 430 during repeated opening and closing, and extending its service life. Furthermore, when installing the sealing ring 430, it can be more accurately engaged in the first mounting groove 412, reducing scratches during mating. Additionally, the multiple threaded grooves ensure that the sealing ring 430 is screwed vertically into the first mounting groove, preventing tilting.

[0081] Please continue reading. Figure 2 The degassing mechanism 400 also includes a vacuum tube 440, which is disposed on the top of the top plate 420 and communicates with the second groove 421. During degassing, the liquid crystal display screen 600 with the polarizer attached is placed into the first groove 411 by the robotic arm 300, and then the top plate 420 is covered by the bottom plate 410. The vacuum tube 440 applies pressure to the first groove 411 and the second groove 421 to expel the air bubbles from the liquid crystal display screen 600 with the polarizer attached after film application. During material removal, when the top plate 420 is separated from the bottom plate 410, the locking ring 413 engages with the threaded groove 431 of the sealing ring 430 to prevent the sealing ring 430 from detaching from the first groove 411. Then, the liquid crystal display screen 600 with the polarizer attached is removed by the robotic arm 300 and placed into the unloading conveyor belt 500 for transportation.

[0082] The vacuum tube 440 is directly connected to the chamber, allowing for rapid establishment of a negative or pressurized environment, which enables more thorough bubble expansion and escape, thereby improving the degassing effect. Specifically, during actual degassing, the first and second grooves are first evacuated to -90 kPa and maintained for 10 seconds through the vacuum tube 440 for initial degassing, and then 0.5 MPa nitrogen is injected for positive pressure degassing, thereby improving the degassing effect.

[0083] Please continue reading. Figure 2 The degassing mechanism 400 further includes a pressing component 450; the pressing component 450 is disposed above the top plate 420 and is used to cover or separate the top plate 420 from the bottom plate 410.

[0084] Specifically, the pressing assembly 450 includes: a pressing plate 451, which is disposed on top of the top plate 420 and connected to the top plate 420; a support frame 452, which is disposed above the top plate 420; and a pressing cylinder 453, which is disposed on top of the support frame 452, and the piston rod of the pressing cylinder 453 passes through the support frame 452 and is connected to the pressing plate 451; the pressing plate 451 is used to drive the top plate 420 away from the bottom plate 410 or cover the bottom plate 410 under the drive of the pressing cylinder 453.

[0085] The pressing cylinder 453 drives the pressing plate 451 to apply force smoothly, ensuring that the compression of the sealing ring 430 is consistent when the cover is closed, avoiding deformation of the sealing ring 430 caused by excessive or uneven compression, thereby improving the service life of the sealing ring 430.

[0086] Please see Figure 2 and Figure 5 The degassing mechanism 400 further includes a translation component 460; the translation component 460 is disposed below the bottom plate 410 and is used to pull the bottom plate 410 out from the bottom of the top plate 420 or send it into the bottom of the top plate 420.

[0087] Specifically, the translation component 460 includes: a support plate 461; a slide rail 462 disposed on the support plate 461; a slider 463 slidably disposed on the slide rail 462, with the top of the slider 463 connected to the bottom surface of the base plate 410; and a translation cylinder 464, with its piston rod connected to the slider 463 and used to drive the slider 463 to slide on the slide rail 462, thereby driving the base plate 410 to be pulled out from or inserted into the bottom of the top plate 420.

[0088] By precisely controlling the movement path of the base plate 410 through the translation cylinder 464, the accuracy of the sealing ring 430 when docking with the second mounting groove 422 is ensured, and the uniformity of pressure on the sealing ring 430 when the top plate 420 and the base plate 410 are closed is improved. At the same time, the rapid withdrawal of the base plate 410 can improve the picking and placing efficiency of the robotic arm 300, and further improve production efficiency while controlling costs.

[0089] Please see Figure 1 The number of degassing mechanisms 400 is multiple; the multiple degassing mechanisms 400 are arranged around the robotic arm 300.

[0090] By setting up multiple degassing mechanisms 400, the usage frequency of a single degassing mechanism 400 is reduced, the production cycle time is extended, and the number of times the sealing ring 430 is compressed within the same time period is reduced, thereby improving the service life of the sealing ring 430 and further increasing the stability of the degassing equipment operation.

[0091] Please see Figure 6 At least one embodiment also provides a method of operation for a liquid crystal display polarizer debubbling device as described above, the method comprising:

[0092] S110: The robotic arm 300 picks up the LCD screen 600 with the polarizer attached from the feeding mechanism 200 and places it into the debubbling mechanism 400.

[0093] S120: The top plate 420 covers the bottom plate 410, so that the upper end of the sealing ring 430 extends out from the first mounting groove 412 and is inserted into the second mounting groove 422, sealing the gap between the first groove 411 and the second groove 421.

[0094] S130: The debubbling mechanism 400 debubbles the liquid crystal display screen 600 in the first groove 411 and the second groove 421 where polarizers are bonded.

[0095] S140: The top plate and bottom plate 410 are separated. The robot arm takes the LCD screen 600 with the polarizer attached from the first groove 411 and puts it into the unloading conveyor belt 500.

[0096] In summary, the present invention provides a liquid crystal display screen polarizer debubbling device and its working method. The debubbling mechanism 400 of the liquid crystal display screen polarizer debubbling device includes: a base plate 410, the center of which has a first groove 411 for placing a liquid crystal display screen 600 with a polarizer attached thereon, and the top surface of the base plate 410 has a first mounting groove 412 surrounding the first groove; and a top plate 420, the center of which has a second groove 421 adapted to the first groove 411 and covering the base plate 410. A second mounting groove 422 is provided on the bottom surface of the top plate 420 at the location where it mates with the first mounting groove 412; a sealing ring 430 is provided inside the first mounting groove 412, and the upper end of the sealing ring 430 extends out from the first mounting groove 412 to be inserted into the second mounting groove 422; the outer wall of the sealing ring 430 is provided with a threaded groove 431, and a retaining ring 413 that mates with the threaded groove 431 extends inward from the top of the outer wall of the first mounting groove 412 to prevent the sealing ring 430 from being pulled out when the top plate 420 is separated from the bottom plate 410. By providing a threaded groove 431 on the outer wall of the sealing ring 430, and extending an inwardly compatible retaining ring 413 from the top of the outer wall of the first mounting groove 412, when the top plate 420 separates from the bottom plate 410, the retaining ring 413 hooks onto the threaded groove 431 on the outer wall of the sealing ring 430, forming a mechanical interlock. This overcomes the problem of the sealing ring falling off due to opening the cavity for material removal after the liquid crystal display screen defoaming, reduces the frequency of equipment downtime and maintenance costs caused by the sealing ring 430 falling off, improves the continuous operation stability and production efficiency of the equipment, and extends the service life of the sealing ring 430. Simultaneously, during disassembly and assembly, simply twisting the sealing ring can release the interference fit with the first mounting groove or achieve an interference fit, avoiding excessive pressure on the sealing ring using a pressing method in related technologies and reducing the deformation of the sealing ring.

[0097] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0098] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0099] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0100] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0101] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A debubbling device for polarizers in liquid crystal displays, characterized in that, include: Work platform (100); A feeding mechanism (200) is provided on the working platform (100); A robotic arm (300) is mounted on the work platform (100) and is used to grasp the liquid crystal display screen (600) with polarizer attached in the feeding mechanism (200); A debubbling mechanism (400) is disposed on the working platform (100) and is used to debubble the liquid crystal display screen (600) with the polarizer attached. The unloading conveyor belt (500) is used to transport the defoamed liquid crystal display screen (600) with polarizer bonded to it, which is taken out by the robotic arm (300); The defoaming mechanism (400) includes: The base plate (410) has a first groove (411) in the middle of its top surface for placing a liquid crystal display screen (600) with a polarizer attached thereon. The top surface of the base plate (410) has a first mounting groove (412) surrounding the first groove. The top plate (420) has a second groove (421) adapted to the first groove (411) in the middle of its bottom surface and covers the bottom plate (410). The bottom surface of the top plate (420) is provided with a second mounting groove (422) at the matching position of the first mounting groove (412). A sealing ring (430) is disposed in the first mounting groove (412), and the upper end of the sealing ring (430) extends out of the first mounting groove (412) to be inserted into the second mounting groove (422); The outer wall of the sealing ring (430) is provided with a threaded groove (431), and a retaining ring (413) for limiting the threaded groove (431) extends inward from the outer wall of the first mounting groove (412) so as to restrict the sealing ring (430) within the first mounting groove (412) when the top plate (420) and the bottom plate (410) are separated.

2. The liquid crystal display screen polarizer debubbling equipment as described in claim 1, characterized in that, When the top plate (420) and the bottom plate (410) are closed, the distance between the bottom of the first mounting groove (412) and the bottom of the second mounting groove (422) is H1; The height of the sealing ring (430) is H2; Where H1 > H2, and the units of H1 and H2 are mm.

3. The liquid crystal display screen polarizer debubbling equipment as described in claim 1, characterized in that, The number of threaded grooves (431) of the sealing ring (430) is multiple; The plurality of said threaded grooves (431) are arranged at circumferential intervals along the sealing ring (430).

4. The liquid crystal display screen polarizer debubbling equipment as described in claim 1, characterized in that, The degassing mechanism (400) also includes a vacuum tube (440), which is disposed on the top of the top plate (420) and communicates with the second groove (421); During degassing, a robotic arm (300) places a liquid crystal display screen (600) with a polarizer attached into a first groove (411). Then, a top plate (420) covers the bottom plate (410). A vacuum tube (440) pressurizes the first groove 411 and the second groove (421) to expel air bubbles from the liquid crystal display screen (600) with the polarizer attached after film application. When the top plate (420) and the bottom plate (410) are separated during material handling, the sealing ring (430) is engaged with the threaded groove (431) of the sealing ring (430) by the retaining ring (413) to prevent the sealing ring (430) from detaching from the first groove (411). Then, the liquid crystal display screen (600) with the polarizer attached is taken out by the robotic arm (300) and placed into the unloading conveyor belt (500) for conveying.

5. The liquid crystal display screen polarizer debubbling equipment as described in claim 1, characterized in that, The defoaming mechanism (400) further includes: Press-fit assembly (450); The pressing assembly (450) is disposed above the top plate (420) and is used to cover or separate the top plate (420) from the bottom plate (410).

6. The liquid crystal display screen polarizer debubbling equipment as described in claim 5, characterized in that, The pressing assembly (450) includes: A pressing plate (451) is disposed on top of the top plate (420) and connected to the top plate (420); A support frame (452) is disposed above the top plate (420); A pressing cylinder (453) is disposed on the top of the support frame (452), and the piston rod of the pressing cylinder (453) passes through the support frame (452) and is connected to the pressing plate (451). The pressing plate (451) is used to drive the top plate (420) away from the bottom plate (410) or cover the bottom plate (410) under the drive of the pressing cylinder (453).

7. The liquid crystal display screen polarizer debubbling equipment as described in claim 1, characterized in that, The defoaming mechanism (400) further includes: Translation component (460); The translation component (460) is disposed below the base plate (410) and is used to pull the base plate (410) out from the bottom of the top plate (420) or insert it into the bottom of the top plate (420).

8. The liquid crystal display screen polarizer debubbling equipment as described in claim 7, characterized in that, The translation component (460) includes: Support plate (461); A slide rail (462) is provided on the support plate (461); A slider (463) is slidably disposed on the slide rail (462), and the top of the slider (463) is connected to the bottom surface of the base plate (410); The translation cylinder (454) has a piston rod connected to the slider (463) and is used to drive the slider (463) to slide on the slide rail (462) so as to drive the bottom plate (410) to be pulled out from the bottom of the top plate (420) or sent into the bottom of the top plate (420).

9. The liquid crystal display screen polarizer debubbling equipment as described in claim 1, characterized in that, The number of the defoaming mechanisms (400) is multiple; Multiple debubbling mechanisms (400) are arranged around the robotic arm (300).

10. A method of operating a liquid crystal display polarizer debubbling device as described in claim 1, characterized in that, The working method includes: The robotic arm (300) picks up the liquid crystal display screen (600) with the polarizer attached from the feeding mechanism (200) and places it into the debubbling mechanism (400); The top plate (420) covers the bottom plate (410), so that the upper end of the sealing ring (430) extends out from the first mounting groove (412) and is inserted into the second mounting groove (422) to seal the gap between the first groove (411) and the second groove (421); The debubbling mechanism (400) debubbles the liquid crystal display screen (600) with polarizers bonded in the first groove (411) and the second groove (421); The top plate and bottom plate (410) are separated. The robot arm takes the liquid crystal display screen (600) with the polarizer attached from the first groove (411) and puts it into the feeding conveyor belt (500).

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