A processing device for television screen production and a use method thereof

Abstract

The application relates to the technical field of liquid crystal display panels, and particularly discloses a processing device for television screen production, which is used for assembling a liquid crystal display panel and comprises an operation table and a clamping piece. A first sliding rail is embedded on the surface of the operation table, a first sliding block is slidably arranged in the first sliding rail, and a glue applying piece for assisting in forming a frame sealing glue is arranged on the first sliding block. The clamping piece comprises a mounting seat, two clamping jaws are symmetrically arranged in the mounting seat, and the clamping piece is also used for assisting in forming the frame sealing glue. The application adopts a side glue applying mode with a reference surface, can improve the regularity of the frame sealing glue after curing and forming, can further improve the stability of a structure after a color film substrate and an array substrate are bonded and boxed, the prefabricated part exists as a separator on one hand to avoid liquid crystal pollution, exists as a spraying reference for a rear coating part on the other hand, and can be better integrated with the prefabricated part after thermal curing.

Description

Technical Field

[0001] This invention belongs to the field of liquid crystal display panel technology, specifically relating to a processing device and method for producing television screens. Background Technology

[0002] The television screen is one of the core components of a television, playing a crucial role in displaying images and providing a visual experience. Most flat-panel televisions currently use liquid crystal display panels (LCDs). LCDs utilize the physical properties of liquid crystals to control the passage of light, thereby displaying images. They consist of two parallel glass substrates with liquid crystal material sandwiched between them. When an electric current passes through the liquid crystal, the arrangement of the liquid crystal molecules changes, altering the polarization state of the light and thus controlling whether light passes through, achieving the purpose of displaying images.

[0003] In this process, after the color filter substrate and the array substrate are assembled, liquid crystal is poured into them to form a liquid crystal layer. This process is inseparable from the bonding of the sealant between the color filter substrate and the array substrate. However, after the color filter substrate and the array substrate are assembled, the liquid crystal is prone to contact with the sealant that has not been fully cured. After long-term contact, small molecules can easily enter the liquid crystal, causing contamination and resulting in display defects such as yellow edges and image retention, which affects the picture quality of the liquid crystal display panel. Summary of the Invention

[0004] The purpose of this invention is to provide a processing apparatus and method for producing television screens, in order to solve the problems in the prior art where ultraviolet light pre-curing and then thermal curing are required for complete curing, which requires a long cycle and small molecules can easily enter the liquid crystal, causing pollution.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A processing apparatus for television screen production is used to assemble liquid crystal display panels. The liquid crystal display panel is composed of a color filter substrate, an array substrate, a liquid crystal layer, and a sealant. The apparatus includes an operating table and a clamping component. A first slide rail is embedded in the surface of the operating table, and a first slider is slidably disposed within the first slide rail. An adhesive applicator for assisting in the formation of the sealant is mounted on the first slider. The clamping component includes a mounting base, within which two grippers are symmetrically disposed. The clamping component also assists in the formation of the sealant.

[0007] Preferably, the adhesive applicator includes a second slide rail fixed to the top of the first slider, a second slider slidably mounted on the second slide rail along its length, and a nozzle penetrating both sides of the second slider.

[0008] Preferably, the first slide rail is arranged in a U-shape on the surface of the operating table and is larger than the area of ​​the liquid crystal display panel.

[0009] Preferably, the sealing adhesive is divided into two components: four pre-formed parts on the inner side and a post-coating part on the outer side; the four pre-formed parts are assembled into a whole and form a rectangular structure. This rectangular structure is set slightly smaller than the surface area of ​​the array substrate to facilitate the subsequent supplementary spraying of the post-coating part, thereby forming a complete sealing adhesive, which helps the color filter substrate and the array substrate to achieve alignment and bonding to complete the cell assembly operation.

[0010] Preferably, the preformed part is pre-processed by forming mold and is then cured and hoisted onto the array substrate by clamping member. The post-coating part is formed by spraying an adhesive onto the rectangular structure composed of four preformed parts. In this way, when vacuum filling liquid crystal, the uncured post-coating part can be kept in long-term contact with the liquid crystal, avoiding contamination and causing defects such as yellow edges and image retention.

[0011] Preferably, the cross-section of the preform is U-shaped, and its two protruding ends are shallow, thereby increasing the contact area between the bottom and top of the post-coating part and the color filter substrate and the array substrate, ensuring a strong adhesion effect of the post-coating part to the color filter substrate and the array substrate after subsequent thermal curing.

[0012] Preferably, the preform part has a plurality of dot-shaped grooves arranged in an array on the side facing away from the liquid crystal layer, and at least two strip-shaped grooves are provided on the inner sidewalls of both protruding ends of the preform part.

[0013] In addition, the present invention also provides the following technical solutions:

[0014] A method of using a processing apparatus for producing television screens includes the following steps:

[0015] Step 1: Place the array substrate on the operating table, and use the grippers to pick up the four prefabricated parts that are assembled into a whole and place them in the center of the array substrate.

[0016] Step 2: The first slider moves sequentially along the track within the first slide rail, and in conjunction with the second slider on the second slide rail, the adaptive orientation adjustment allows the nozzle to spray a layer of post-coating onto the periphery of the four prefabricated sections.

[0017] Step 3: Cover with the color filter substrate to complete the bonding of the color filter substrate and the array substrate. Then, the post-coating is pre-cured by ultraviolet light and then fully cured by thermosetting.

[0018] Step 4: Make injection ports by drilling holes in the sealant, and then inject liquid crystal into the spaces formed by the color filter substrate, array substrate and sealant under vacuum to finally form a liquid crystal layer.

[0019] Preferably, in step one, the four prefabricated parts can be spliced ​​and fixed by adhesive or snap-fit.

[0020] Preferably, in step two, the array of dotted grooves and the two sets of strip grooves symmetrically arranged on the prefabricated part can improve the connection between the prefabricated part and the post-coating part, and reduce the risk of peeling off between the two in the later stage.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention changes the existing technology of forming the sealing adhesive in a single spraying process to a process of spraying a layer of post-coating using four prefabricated parts as a framework. The spraying of the post-coating uses the rectangular structure formed by the four prefabricated parts as a coordinate reference, which can improve the regularity of the sealing adhesive after curing. Compared with the current sealing adhesive formed by a single spraying process using top-applied adhesive, this solution uses side-applied adhesive with a reference surface, which can avoid the sealing adhesive from being distorted or twisted, thereby improving the stability of the structure after bonding the color filter substrate and the array substrate to the cell and reducing the loosening of the connection caused by uneven stress.

[0023] 2. In this invention, the cross-section of the preform is set to a U-shape, and its two protruding ends are relatively shallow. This can increase the contact area between the bottom and top of the post-coating part and the color filter substrate and the array substrate, thereby ensuring a strong adhesion effect of the post-coating part to the color filter substrate and the array substrate after subsequent thermal curing.

[0024] 3. The present invention improves the connection between the prefabricated part and the post-coating part by using the array of dot-shaped grooves on the prefabricated part and the two sets of strip grooves symmetrically arranged on the upper and lower parts, and by interlocking at the connection point, thereby reducing the risk of peeling off between the two in the later stage.

[0025] 4. The inner layer of the present invention is prefabricated, which can avoid the contact between the injected liquid crystal and the uncured post-coating, but instead allow it to directly contact the cured prefabricated part. In this way, small molecules in the uncured post-coating, such as coupling agents and curing agents, will not enter the liquid crystal and will not cause liquid crystal contamination, thereby greatly improving the yield of the liquid crystal display panel. Attached Figure Description

[0026] Figure 1 This is a construction diagram of the present invention;

[0027] Figure 2 This is a structural diagram of the liquid crystal display panel of the present invention;

[0028] Figure 3 This is a schematic diagram showing the preform of the present invention being placed on the array substrate;

[0029] Figure 4This is a diagram showing the state of the preform on the array substrate after the coating is applied using the coating component according to the present invention.

[0030] Figure 5 This is a three-dimensional schematic diagram of the prefabricated part of the present invention;

[0031] Figure 6 This is a schematic diagram showing the position of the first slide rail on the operating table of the present invention.

[0032] In the picture:

[0033] 1. Liquid crystal display panel; 11. Color filter substrate; 12. Array substrate; 13. Liquid crystal layer; 14. Sealing adhesive; 141. Pre-fabrication section; 1411. Dot groove; 1412. Strip groove; 142. Post-coating section;

[0034] 2. Control panel; 21. First slide rail; 22. First slider;

[0035] 3. Clamping component; 31. Mounting base; 32. Gripper;

[0036] 4. Glue-applying part; 41. Second slide rail; 42. Second slider; 43. Nozzle. Detailed Implementation

[0037] The technical solutions of the embodiments 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, and 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.

[0038] Reference Figure 1 , Figure 2 and Figure 6As shown, the present invention provides a processing apparatus for television screen production, used to assemble a liquid crystal display panel 1. The liquid crystal display panel 1 is composed of a color filter substrate 11, an array substrate 12, a liquid crystal layer 13, and a sealing adhesive 14. The apparatus includes an operating table 2 and a clamping member 3. A first slide rail 21 is embedded in the surface of the operating table 2. The first slide rail 21 is arranged in a U-shape on the surface of the operating table 2 and is larger than the surface area of ​​the liquid crystal display panel 1, facilitating the application of adhesive by the coating member 4 along the outer edge of the array substrate 12 for post-coating. In the spraying process of 142, a first slider 22 is slidably disposed within the first slide rail 21. An adhesive applicator 4 for assisting in the formation of the sealing adhesive 14 is mounted on the first slider 22. The adhesive applicator 4 includes a second slide rail 41 fixed to the top of the first slider 22, on which the second slider 42 is slidably mounted along its length. Both the first slide rail 21 and the second slide rail 41 are electrically driven. The first slide rail 21 is driven by a flexible drive shaft, facilitating the movement of the first slider 22 along a U-shape. The cornering angle of the first slide rail 21 is set as follows... Figure 6 As shown, the slide rail 41 is designed with a smooth transition and an arc-shaped corner to facilitate the cyclical movement of the first slider 22 and avoid jamming. The second slide rail 41 is driven by a linear motor, and the second slider 42 is equipped with nozzles 43 that pass through both sides. The clamping member 3 includes a mounting base 31, and two clamping claws 32 are symmetrically arranged inside the mounting base 31. Specifically, the clamping and releasing actions of the clamping claws 32 are achieved by an electric push rod (not shown in the figure) in the mounting base 31, which is a mature existing technology and will not be described in detail here. The clamping member 3 is also used to assist in the formation of the sealing adhesive 14.

[0039] In a further embodiment, refer to Figures 2-4 As shown, the sealing adhesive 14 is specifically divided into two components: four pre-formed parts 141 arranged on the inner side and a post-coating part 142 arranged on the outer side. The four pre-formed parts 141 are assembled into a whole and form a rectangular structure, which can serve as a reference base surface for the spraying of the post-coating part 142. This method, by using side-applied adhesive with a reference surface, replaces the current method of top-applied adhesive in a single spraying, and can form a more regular sealing adhesive 14, which facilitates better bonding between the color filter substrate 11 and the array substrate 12. The rectangular structure is set slightly smaller than the surface area of ​​the array substrate 12, which facilitates the subsequent supplementary spraying of the post-coating part 142, thereby forming a complete sealing adhesive 14, which helps the color filter substrate 11 and the array substrate 12 to achieve alignment and bonding to complete the cell assembly operation.

[0040] In this embodiment, the traditional one-time spraying of the sealing adhesive 14 is divided into two parts. The post-coating part 142 is sprayed with the prefabricated part 141 as a reference, which can improve the regularity of the sealing adhesive 14 after curing. It is convenient for the post-coating part 142 to spray based on the rectangular structure of the prefabricated part 141, so as to promote the regular formation of the sealing adhesive 14. Compared with the current one-time spraying of the sealing adhesive 14 using the top-applied method, this solution uses the side-applied method with a reference surface, which can avoid the sealing adhesive 14 from being distorted and twisted. This can improve the stability of the bonding structure of the color filter substrate 11 and the array substrate 12 after bonding.

[0041] In a further embodiment, the preform 141 is pre-processed using a forming mold, that is, the raw material is injected into the mold, cured and then removed. The cured preform 141 serves as a reference for the spraying of the post-coating 142, which is reliable, does not deform, and is pre-processed, ready to use, convenient and reliable. After the preform 141 is cured, it is hoisted onto the array substrate 12 by the clamping member 3. The clamping member 3 can be set into two sets to facilitate hoisting of the four preforms 141 that are assembled into a rectangle from both sides, ensuring that the workpiece is subjected to uniform force during clamping, making the clamping process more stable and reliable. The post-coating 142 is formed by spraying an adhesive onto the rectangular structure composed of the four preforms 141 using the adhesive applicator 4. In this way, when vacuum filling liquid crystal, the uncured post-coating 142 can be kept in long-term contact with the liquid crystal, avoiding contamination and causing defects such as yellow edges and image retention.

[0042] In this embodiment, the clamping member 3 can be connected to a robotic arm (not shown in the figure) to lift, align and release the four prefabricated parts 141 that are assembled into a rectangle. The inner prefabricated part 141 is prefabricated and has high structural strength. It can avoid the contact between the injected liquid crystal and the uncured post-coating part 142, but instead directly contact the cured prefabricated part 141. In this way, small molecules in the uncured post-coating part 142, such as coupling agents and curing agents, will not enter the liquid crystal and will not cause liquid crystal contamination. This greatly improves the yield of the liquid crystal display panel 1 and reduces display defects such as yellow edges and image retention.

[0043] In a further embodiment, refer to Figure 2 and Figure 5As shown, the cross-section of the preform 141 is U-shaped, and its protruding ends are relatively shallow. The length of the protruding ends is about twice the thickness of the preform 141. This allows it to maintain the padding capacity of both ends for the color filter substrate 11 and the array substrate 12, and also prevents the loss of effective bonding strength between the bottom and top of the post-coating part 142 and the color filter substrate 11 and the array substrate 12 due to excessive extension. This allows the sealing adhesive 14 to exert its proper bonding ability and ensures the stability after the cell is assembled. In other words, the preform 141 serves as a separator to prevent liquid crystal contamination, and as a reference for the spraying of the post-coating part 142. It can also be well integrated with the preform 141 after heat curing. The two have the same properties and materials, so there is basically no repulsion or separation. This increases the contact area between the bottom and top of the post-coating part 142 and the color filter substrate 11 and the array substrate 12, ensuring a strong bonding effect of the post-coating part 142 to the color filter substrate 11 and the array substrate 12 after subsequent heat curing.

[0044] Furthermore, the preform 141 has a plurality of dot-shaped grooves 1411 arranged in an array on the side opposite to the liquid crystal layer 13, and at least two strip grooves 1412 are provided on the inner sidewalls of both protruding ends of the preform 141. In this way, the interlocking of the connection points can improve the connection tightness between the preform 141 and the post-coating part 142, reducing the risk of peeling off between the two later. Specifically, the side of the nozzle 43 can be connected to a scraper (not shown in the figure) through a telescopic component. The scraper can be set as a thin metal sheet. After the nozzle 43 circles around the four preforms 141 that are assembled into a rectangle and forms the post-coating part 142, the telescopic component can be controlled to extend, causing the scraper to extend to the front of the nozzle 43. Then, the first slider 22 moves around again in the first slide rail 21, driving the scraper to coat the post-coating part 142. For compaction and shaping purposes, nozzle 43 no longer sprays adhesive in this round. The pressure generated by the scraper as it moves with the adhesive coating part 4 can make the post-coating part 142 generated by the previous round of spraying more tightly connected with the dot grooves 1411 and strip grooves 1412 in the preform part 141. This presses the adhesive of the post-coating part 142 near the end of the preform part 141 into the gaps between the micropores of the dot grooves 1411 and the strip grooves 1412, further improving the connection between the preform part 141 and the post-coating part 142 on the subsequent spray, thereby avoiding the possibility of peeling off between the two later. Afterwards, the telescopic part retracts, driving the scraper to move behind the nozzle 43, making it convenient for the nozzle 43 to be put into the next spraying step to form the post-coating part 142. The telescopic part can be specifically set as a common electric push rod, which is easy to assemble, flexible and easy to control in terms of extension and retraction, and has high reliability.

[0045] In this embodiment, the gel-like post-coating portion 142 is sprayed onto the pre-formed portion 141. The adhesive in the post-coating portion 142 is embedded in the dotted grooves 1411 and striped grooves 1412. During the thermosetting process of the post-coating portion 142, it can be well embedded with the pre-formed portion 141, thus becoming a single unit with good fusion. Compared with the prior art of forming the sealing adhesive 14 by spraying in one step, the present invention divides the sealing adhesive 14 into an inner pre-formed portion 141 that has been cured and an outer post-coating portion 142 that is sprayed and cured first. However, during the curing process of the post-coating portion 142, in conjunction with the special U-shaped structure of the pre-formed portion 141 and the dotted grooves 1411 and striped grooves 1412 thereon, the structural effect of the sealing adhesive 14 can be achieved by spraying in one step. Afterwards, the possibility of peeling between the pre-formed portion 141 and the post-coating portion 142 is extremely low and controllable. It is superior to the prior art in terms of construction process, liquid crystal anti-pollution, and ease of operation. Meanwhile, the thickness of the preform 141 is only a small part of the thickness of the sealant 14 after molding, and its influence on the bonding effect of the sealant 14 on the color filter substrate 11 and the array substrate 12 is negligible. The advantages of the preform 141 are obvious, and the disadvantages can be ignored.

[0046] The present invention also provides a method for using a processing apparatus for television screen production, comprising the following steps:

[0047] Step 1: Place the array substrate 12 on the operating table 2, and use the gripper 32 to clamp the four prefabricated parts 141 assembled into a whole and place them in the center of the array substrate 12.

[0048] Step 2: The first slider 22 moves sequentially along the track within the first slide rail 21, and the second slider 42 is adjusted in an adaptive position on the second slide rail 41, so that a layer of post-coating 142 can be sprayed onto the periphery of the four prefabricated parts 141 using the nozzle 43.

[0049] Step 3: Cover the color filter substrate 11 to complete the bonding of the color filter substrate 11 and the array substrate 12. Then the post-coating part 142 is pre-cured by ultraviolet light and then fully cured by heat curing.

[0050] Step 4: Make injection ports by drilling holes in the sealant 14, and then inject liquid crystal into the space formed by the color filter substrate 11, the array substrate 12 and the sealant 14 under vacuum to finally form the liquid crystal layer 13.

[0051] In step one, the four prefabricated parts 141 can be spliced ​​and fixed by adhesive or snap-fit. In step two, the array of dotted grooves 1411 and the two sets of strip grooves 1412 arranged symmetrically on the prefabricated parts 141 can improve the connection between the prefabricated parts 141 and the post-coating parts 142 on the subsequent spraying, and reduce the risk of peeling between the two in the later stage.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A processing apparatus for manufacturing television screens, used for assembling liquid crystal display panels, the liquid crystal display panels being composed of a color filter substrate, an array substrate, a liquid crystal layer, and a sealant, characterized in that... The device includes an operating table and a clamping component. A first slide rail is embedded in the surface of the operating table, and a first slider is slidably disposed within the first slide rail. An adhesive applicator for assisting in the formation of a sealing adhesive is mounted on the first slider. The clamping component includes a mounting base, and two grippers are symmetrically disposed within the mounting base. The clamping component is also used to assist in the formation of a sealing adhesive. The adhesive coating component includes a second slide rail fixed to the top of the first slider, a second slider slidably mounted on the second slide rail along its length, and a nozzle penetrating both sides of the second slider. The sealing adhesive is specifically divided into two components: four pre-formed parts set on the inner side and a post-coating part set on the outer side. The four pre-formed parts are assembled into a whole and form a rectangular structure. This rectangular structure is set slightly smaller than the surface area of ​​the array substrate to facilitate the subsequent supplementary spraying of the post-coating part, thereby forming a complete sealing adhesive, which helps the color filter substrate and the array substrate to achieve alignment and bonding to complete the cell assembly operation. The preform is pre-processed using a forming mold and is then cured before being hoisted onto the array substrate by a clamping device. The post-coating part is formed by spraying an adhesive onto the rectangular structure composed of the four preforms using an adhesive applicator. This avoids long-term contact between the uncured post-coating part and the liquid crystal during vacuum injection of liquid crystal, thus preventing contamination and causing defects such as yellowing edges and image retention.

2. The processing apparatus for television screen production according to claim 1, characterized in that: The first slide rail is arranged in a U-shape on the surface of the operating table and is larger than the area of ​​the liquid crystal display panel.

3. The processing apparatus for television screen production according to claim 1, characterized in that: The cross-section of the preform is U-shaped, and its protruding ends are shallow, thereby increasing the contact area between the bottom and top of the post-coating part and the color filter substrate and the array substrate, ensuring a strong adhesion effect of the post-coating part to the color filter substrate and the array substrate after subsequent thermal curing.

4. The processing apparatus for television screen production according to claim 3, characterized in that: The preform part has multiple dot-shaped grooves arranged in an array on the side opposite to the liquid crystal layer, and at least two strip grooves are provided on the inner sidewalls of both protruding ends of the preform part.

5. A method of using a processing apparatus for television screen production according to any one of claims 1-4, characterized in that: Includes the following steps: Step 1: Place the array substrate on the operating table, and use the grippers to pick up the four prefabricated parts that are assembled into a whole and place them in the center of the array substrate. Step 2: The first slider moves sequentially along the track within the first slide rail, and in conjunction with the second slider on the second slide rail, the adaptive orientation adjustment allows the nozzle to spray a layer of post-coating onto the periphery of the four prefabricated sections. Step 3: Cover with the color filter substrate to complete the bonding of the color filter substrate and the array substrate. Then, the post-coating is pre-cured by ultraviolet light and then fully cured by thermosetting. Step 4: Make injection ports by drilling holes in the sealant, and then inject liquid crystal into the spaces formed by the color filter substrate, array substrate and sealant under vacuum to finally form a liquid crystal layer.

6. The method of using the processing apparatus for television screen production according to claim 5, characterized in that: In step one, the four prefabricated parts can be spliced ​​and fixed by adhesive or snap-fit.

7. The method of using the processing apparatus for television screen production according to claim 5, characterized in that: In step two, the array of dotted grooves and the two sets of strip grooves symmetrically arranged on the prefabricated part can improve the connection between the prefabricated part and the post-coating part, reducing the risk of peeling off between the two later.

Images