Liquid crystal display screen based on frame structure optimization and precise assembly process thereof

Abstract

The invention relates to a liquid crystal display screen based on frame structure optimization and a precise assembly process thereof, and relates to the technical field of liquid crystal display screen precise assembly processes, the liquid crystal display screen comprises a lower iron frame, an upper iron frame and a liquid crystal panel, the lower iron frame and the upper iron frame are buckled with each other, a rubber frame is connected to the joint of the lower iron frame and the upper iron frame, and the rubber frame is connected with the liquid crystal panel. The liquid crystal panel is arranged between the lower iron frame and the upper iron frame, the side, close to the lower iron frame, of the liquid crystal panel is connected with a light guide plate, two sets of inner positioning holes are formed in the lower iron frame, and six sets of bosses are arranged on the two sides of the top of the front face of the lower iron frame. Produced products are uniform in quality through a perfect and detailed production process, technical errors generated in the production process are reduced by standardizing the production environment and behaviors of workers in the production process, later classification and transportation are facilitated through unified packaging specifications, and the production efficiency is improved. And quality inspection is carried out on the product through a strict detection process, so that the produced product has no quality problem during sales.

Description

Technical Field

[0001] This application relates to the field of precision assembly technology for liquid crystal display screens, and in particular to a liquid crystal display screen based on frame structure optimization and its precision assembly process. Background Technology

[0002] LCD screens are a type of flat panel display used for television and computer screens. Finished LCD screens are usually assembled on assembly lines, and due to my country's labor advantage, many brands of LCD screens are manufactured in factories in my country.

[0003] However, the current precision assembly process on the production lines is relatively crude, and the production workflow is not standardized enough. The requirements for workers are not strict enough, which leads to inconsistent quality of LCD screen products. Substandard products entering the market will affect the brand's reputation and the cooperation between the processing factory and the brand. Therefore, a complete production process and strict quality inspection are needed to make the production of LCD screens more standardized and the quality of products consistent.

[0004] Therefore, a liquid crystal display screen based on frame structure optimization and its precision assembly process are proposed to address the aforementioned technical problems. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a liquid crystal display screen based on an optimized frame structure and its precision assembly process.

[0006] This application provides a liquid crystal display screen based on an optimized frame structure and its precision assembly process, employing the following technical solution:

[0007] A liquid crystal display screen based on frame structure optimization includes a lower iron frame, an upper iron frame, and a liquid crystal panel. The lower iron frame and the upper iron frame are interlocked, and a glue frame is connected at the connection between the lower iron frame and the upper iron frame. The liquid crystal panel is disposed between the lower iron frame and the upper iron frame, and a light guide plate is connected to the side of the liquid crystal panel near the lower iron frame.

[0008] The lower iron frame has two sets of internal positioning holes, and six sets of protrusions are provided on both sides of the top front of the lower iron frame. A light strip is pasted on the inner side of the front of the lower iron frame, and a light strip is connected to the inner side of the retaining wall on the side of the lower iron frame near the internal positioning holes. An upper brightness enhancement film, a lower brightness enhancement film, and a diffusion film are attached to the top of the light guide plate from top to bottom, and a reflective film is provided below the light guide plate.

[0009] On the other hand, this application provides a precision assembly process for a liquid crystal display screen based on frame structure optimization, which utilizes the aforementioned liquid crystal display screen based on frame structure optimization, and includes the following steps:

[0010] S1, preparation: take the lower iron frame, the upper iron frame, the rubber frame, the liquid crystal panel, the light guide plate, the light bar, the optical film layer, the adhesive material and the packaging material;

[0011] S2, frame pretreatment: attach silica gel pads to the boss position of the lower iron frame, attach silica gel pads to the outer side of the rubber frame, and attach foam rubber to the inner edge of the front and back of the rubber frame, then attach double-sided adhesive tape to the edge of the upper iron frame, and attach black mala rubber to the outer edge of the back of the lower iron frame, then attach a light bar to the inner side of one side of the lower iron frame;

[0012] S3, assemble the backlight module: install the reflective film, light guide plate and optical film layer into the lower iron frame in sequence, and fix them through the rubber frame;

[0013] S4, integrate the liquid crystal panel: place the liquid crystal panel in the rubber frame, buckle the upper iron frame, and conduct conductive glue fixation and signal terminal packaging;

[0014] S5, detection and packaging: turn on the module for function test, attach identification label, then pack and limit the stacking height to no more than four layers.

[0015] Preferably, the adhesive material includes silica gel pads, conductive glue, foam rubber, double-sided adhesive tape, black mala rubber and black single-sided adhesive tape, wherein the silica gel pads attached to the lower iron frame have a specification of 15*2*2mm, the silica gel pads attached to the long side position of the rubber frame have a specification of 15*2*2mm, the silica gel pads attached to the short side position of the rubber frame have a specification of 15*1.5*2mm, the foam rubber attached to the long side position of the rubber frame has a specification of 484*2mm, and the foam rubber attached to the short side position of the rubber frame has a specification of 272*2mm.

[0016] Preferably, the foam rubber is attached to the inner edge of the rubber frame with a 1mm spacing from the edge, the attachment position of the foam rubber is the starting point at a position 2mm away from the rubber frame barrier and 1mm away from the inner edge along the inner edge of the rubber frame, four double-sided adhesive tapes are attached in one group, and the four double-sided adhesive tapes are attached end to end at a position 1mm away from the outer edge of the upper iron frame, and the conductive glue is attached half on the T-CON copper skin and half on the lower iron frame.

[0017] By adopting the above technical solution, the production environment and the behavior of the workers in the production process are standardized to reduce technical errors in the production process and make the product appearance more neat.

[0018] Preferably, the attachment sequence of the optical film layer is diffusion film, lower light enhancement film and upper light enhancement film, the diffusion film has a frosted surface facing upward, before assembling the backlight module, a dust-sticking roller is used to clean the lower iron frame in longitudinal and transverse directions, the roller is cleaned on the dust-sticking pad every 1 hour, and the dust-sticking pad is replaced every 2 hours.

[0019] By adopting the above technical scheme, it is ensured that the various adhesive tapes are not contaminated by dust and affect use.

[0020] Preferably, the lamp bar is installed at a long side transverse position far from the inner positioning hole of the bottom, the installation direction of the light guide plate is upwardly facing the light emitting surface, the notch is aligned with the lower right corner, and the film ear is aligned with the iron frame slot and placed flat.

[0021] Preferably, the fixing of the liquid crystal panel is completed by a negative pressure suction jig, the negative pressure value is not less than -40Kp, the output current of the jig is 220mA when assembling the backlight module, the voltage power of the jig is between 42V and 48V, the parameter setting of the test jig is 5.0, and the defective products after detection need to be marked and isolated.

[0022] Preferably, the packaging material includes transparent PET, masking glue, barcode stickers, packaging bags, spandex, and packaging boxes, and when the finished products are packaged, the screens of the modules need to be placed opposite to each other, the bag openings are uniformly folded, and spandex knives are used to fix the products in the cartons.

[0023] By adopting the above technical scheme, through the unified and safe packaging method, the product will not be damaged in the subsequent sales and transportation process.

[0024] Preferably, in addition to the material preparation and outer packaging steps, all processes need to wear an electrostatic bracelet and gloves, and the ion fan needs to be turned on to 2 or more, and the operator needs to be 30±5cm away from the product when pre-treating the frame, assembling the backlight module, and integrating the liquid crystal panel, and the number of layers of the products stacked cannot exceed five.

[0025] By adopting the above technical scheme, through wearing an electrostatic bracelet and gloves and an ion fan, an electrostatic production line is realized, so as to avoid the damage of static electricity generated by the worker's body to the electronic product, and through limiting the distance between the operator and the product, it is ensured that the body fluid or hair of the operator may fall on the electronic product due to the too close distance between the operator and the electronic product, through warning to gently hold and place, single piece operation, attention to not scratch and scratch the product, and avoiding heavy pressure on the iron frame to cause damage.

[0026] 1. Compared with the prior art, the liquid crystal display screen based on frame structure optimization and the precise assembly process thereof, through perfect and meticulous production process, the quality of the products produced is uniform, and nineteen meticulous processes are set from batching to packaging, for taking materials, issuing materials, preparing silica gel pads for lower iron frame, preparing silica gel pads for glue frame, preparing foam glue for glue frame, preparing double-sided adhesive tape for upper iron frame, preparing black mala glue for lower iron frame, assembling lamp strips, dust removal of lower iron frame, assembling semi-finished products, pasting films, covering OC and upper iron frame, pasting transparent PET, packaging terminal wires and fixing T-CON, T-CON and iron frame packaging glue, fixing terminal wires, testing, pasting easy-to-tear stickers and labels, appearance and bagging, and packaging.

[0027] 2. Compared with the prior art, the liquid crystal display screen based on frame structure optimization and the precise assembly process thereof, through standardizing the production environment and the behavior of workers in the production process, technical errors generated in the production process are reduced, all production steps except the material preparation and packaging steps need to wear an electrostatic bracelet and gloves before work, and the ion fan needs to be turned on to two or more gears, the worker needs to be 30±5 cm away from the product, and the glue frame needs to be blown with a dust gun after work and hung on the glue frame trolley, and the worker needs to pay attention to not press the lower iron frame too hard, needs to handle it gently, needs to work on a single piece, and needs to pay attention to not scratch or damage the product.

[0028] 3. Compared with the prior art, the liquid crystal display screen based on frame structure optimization and the precise assembly process thereof, through unified packaging specifications, classification and transportation in the later stage are facilitated, through strict detection processes, quality inspection of the products is carried out, so that the products produced will not have quality problems when sold, and through the standard packaging process, the safety of the products during transportation and distribution is ensured, the products cannot be scratched, damaged or pressed during the work process, the bar code and easy-to-tear stickers need to be attached in a unified position, the number of each box needs to be counted, there cannot be more or fewer, and the products need to be placed in a unified direction, and the height of the carton stack after loading cannot exceed 4 layers. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is an exploded view of the main body of the present application;

[0030] Figure 2 is a front structure diagram of the lower iron frame of the present application;

[0031] Figure 3 is a structure diagram of the side of the light guide plate of the present application;

[0032] Figure 4 is a process flow diagram of the present application;

[0033] Figure 5 is a process flow diagram of the frame pretreatment of the present application;

[0034] Figure 6 Process flow chart for assembling backlight module of the present application;

[0035] Figure 7 Process flow chart for integrating liquid crystal panel of the present application;

[0036] Figure 8 Process flow chart for detection and packaging of the present application.

[0037] The reference signs are: 1, lower iron frame; 11, inner positioning hole; 12, boss; 13, light bar; 2, upper iron frame; 3, liquid crystal panel; 4, glue frame; 5, light guide plate; 51, diffusion film; 52, upper light enhancement film; 53, lower light enhancement film; 54, reflective film. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] The following will be described in detail with reference to the drawings in the embodiments of the present application. Figures 1-8 The present application will be further described in detail.

[0040] A liquid crystal display screen based on frame structure optimization, comprising a lower iron frame 1, an upper iron frame 2 and a liquid crystal panel 3, referring to Figure 1 and Figure 2 and Figure 3 The lower iron frame 1 and the upper iron frame 2 are buckled to each other, and the connection between the lower iron frame 1 and the upper iron frame 2 is connected with a glue frame 4. The liquid crystal panel 3 is arranged between the lower iron frame 1 and the upper iron frame 2, and the side of the liquid crystal panel 3 close to the lower iron frame 1 is connected with a light guide plate 5.

[0041] Among them, two groups of inner positioning holes 11 are arranged in the lower iron frame 1, and six groups of bosses 12 are arranged on both sides of the top of the front surface of the lower iron frame 1. A light bar 13 is pasted on the inner side of the front surface of the lower iron frame 1, and the light bar 13 is connected with the inner side of the retaining wall close to the inner positioning hole 11 of the lower iron frame 1. An upper light enhancement film 52, a lower light enhancement film 53 and a diffusion film 51 are sequentially attached above the light guide plate 5 from top to bottom, and a reflective film 54 is arranged below the light guide plate 5.

[0042] As a preferred embodiment, a precise assembly process of a liquid crystal display screen based on frame structure optimization comprises the following steps:

[0043] S1, material preparation: taking a lower iron frame 1, an upper iron frame 2, a glue frame 4, a liquid crystal panel 3, a light guide plate 5, a light bar 13, an optical film layer, an adhesive material and a packaging material;

[0044] S2. Frame pretreatment: attach silicone pads to the protrusions 12 of the lower iron frame 1, attach silicone pads to the outside of the plastic frame 4, attach foam adhesive to the inner edges of the front and back sides of the plastic frame 4, attach double-sided tape to the edge of the upper iron frame 2, attach black PVC adhesive to the outer edge of the back of the lower iron frame 1, and attach light strip 13 to the inner side of one side of the lower iron frame 1.

[0045] S3. Assemble the backlight module: Install the reflective film 54, light guide plate 5 and optical film layer into the lower iron frame 1 in sequence, and fix them with the glue frame 4.

[0046] S4. Integrated LCD panel: Place the LCD panel 3 inside the frame 4, fasten the iron frame 2, and fix it with conductive adhesive and encapsulate the signal terminals.

[0047] S5. Testing and Packaging: The illuminated modules are tested for functionality, labeled, and then packed into boxes, with a stacking height limited to no more than four layers.

[0048] Reference Figure 4 and Figure 5 as well as Figure 6The adhesive materials include silicone pads, conductive adhesive, foam adhesive, double-sided tape, black adhesive tape, and black single-sided tape. The silicone pads attached to the lower iron frame 1 have dimensions of 15*2*2mm, while the silicone pads attached to the long side of the frame 4 have dimensions of 15*2*2mm, and the silicone pads attached to the short side of the frame 4 have dimensions of 15*1.5*2mm. The foam adhesive attached to the long side of the frame 4 has dimensions of 484*2mm, and the foam adhesive attached to the short side of the frame 4 has dimensions of... 272*2mm; and the process of preparing the silicone pad for the lower iron frame 1 is as follows: take a piece of lower iron frame 1, place the lower iron frame 1 vertically with the frame face up, first find the long side where the silicone pad is to be attached according to the inner positioning hole 11 of the iron frame, then find the positions of the first and sixth protrusions 12 from left to right, and vertically attach the silicone pad to the middle position of the protrusion 12 along the long side wall of the lower iron frame 1. The process of preparing the silicone pad for the rubber frame 4 is as follows: take a piece of rubber frame 4, and place the rubber frame 4 with the shallower side of the front wall facing up. Using tweezers, place four silicone pads vertically along the two long sides of the frame 4, close to the retaining wall. After confirming the correct position, press them firmly with your hand. Then, in the same way, place two more silicone pads on the inside of the left short retaining wall. After confirming that the position, size, and quantity of the silicone pads are correct, stack the frames 4 neatly and move them to the next process. After placing the silicone pads, you must use tweezers to tighten them firmly. After confirming that the position of the silicone pads is correct, use the tip of the tweezers to tighten them firmly. After the silicone pads are attached, check for any missing, misaligned, or incorrectly placed pads. After stacking, the process of preparing black adhesive for the lower iron frame 1 is as follows: take one piece of lower iron frame 1 and place it on the table with the back facing up; tear off one piece of adhesive from the release paper, starting from the first fastener of the lower iron frame 1, and apply the adhesive along the outer edge of the lower iron frame 1 from the near to the front, with the notched edge facing left and the pre-cut line aligned with the edge of the lower iron frame 1. After confirming that there is no skewing or wrinkling, smooth it with your hand. Then, fold the excess adhesive to the side of the lower iron frame 1 and smooth it with your hand. After inspecting the adhesive for wrinkles and misalignment, place the iron frames neatly and let them flow into the next work station.

[0049] The steps for applying transparent PET are as follows: Take one piece of the previous process product, and under a green light, use a blade to peel off the four strips of double-sided adhesive release paper from the edge of the upper iron frame 2. Check the surface of the LCD panel 3 for foreign objects, dirt, and defects, and clean it promptly. Take one piece of PET film, and under a green light, use a lint-free cloth dampened with alcohol to clean the surface of foreign objects. Using the long side closest to the body as a reference, apply the PET to the surface of the upper iron frame 2 along the two short sides. After confirming that the PET does not extend beyond the edge and that there are no foreign objects inside the film, press the prepared adhesive area firmly by hand, and put the product into the production line to flow into the next process. The process of wrapping terminal wires and fixing T-CON is as follows: Take one piece of product and place it under the iron frame 1. Place the product face up on the workbench. Then, take a piece of adhesive foam and wrap it around the terminal wire connection. Finally, tear off a 3-4cm long piece of high-temperature adhesive and wrap it around the surface of the adhesive foam. Place one piece of the product on the workbench. Take another roll of double-sided tape and, starting from the left end of the T-CON, stick two strips of double-sided tape from left to right. Then, peel off the release paper from two strips of double-sided tape. Gently pull the T-CON and fold it to the back of the iron frame. Take conductive adhesive and stick three strips of conductive adhesive to the three grounding points of the T-CON. Smooth the conductive adhesive and stick half of it to the copper surface of the T-CON and the other half to the iron frame. The process of applying adhesive to the T-CON and the metal frame is as follows: Take one piece of product and place it on the workbench. Then take another piece of black PET. Starting from the left side of the upper metal frame 2, align the edge of the PET with the edge of the upper metal frame 2 and apply it from left to right. After confirming that the PET is not misaligned, smooth it firmly by hand. Then, stand the product upright and fold the excess part of the PET to the lower metal frame 1 of the product. After confirming that there is no misalignment, smooth it firmly by hand. Then, place the product flat on the workbench. Take one piece of black single-sided tape and place it vertically. Using the 1 / 2 width of the single-sided tape as the boundary, apply the left 1 / 2 of the single-sided tape. On the surface of the lower iron frame 1, fold the excess part and attach it to the side of the upper iron frame 2. In this way, the two single-sided adhesive strips are attached. After checking that the single-sided adhesive strips are not peeling or loose, the product flows into the next process. The process of fixing the terminal wire is as follows: take one piece of product, place it with the lower iron frame 1 side facing up and the wire end facing the upper right corner; take one piece of black adhesive, hold the adhesive strip in your left hand, and gently pull the terminal wire to the left with your right hand, and attach the adhesive strip to the terminal wire. After confirming that the adhesive strip does not exceed the edge of the lower iron frame 1 and is not obviously offset, press the adhesive strip firmly with your fingers and flow into the next process.

[0050] Reference Figure 4 and Figure 5Foam adhesive is applied to the inner edge of the frame 4, maintaining a 1mm gap from the edge. The foam adhesive is applied starting 2mm from the wall of the frame 4 and 1mm from the inner edge, along the inner edge of the frame. Four strips of double-sided adhesive are applied in groups of four, with the four strips connected end-to-end and applied 1mm from the outer edge of the upper iron frame 2. Half of the conductive adhesive is applied to the T-CON copper foil, and the other half to the lower iron frame 1. The process of preparing the foam adhesive for the frame 4 is as follows: Take one piece of frame 4... With the shallower side of the front retaining wall facing up on the table, use tweezers to pick up a long strip of foam adhesive. Starting about 2mm from the retaining wall and about 1mm from the inner edge of the frame 4, apply the adhesive strip from the near side to the front, ensuring it is straight and wrinkle-free. Smooth it with your fingers. Then, rotate the frame 4 90°. Take another strip of foam adhesive, align it with the side of the first strip, and apply it from the near side to the front, maintaining a distance of about 1mm from the inner edge of the frame 4. Repeat the same process. After applying the foam adhesive to the front of the frame 4, apply four more strips of foam adhesive to the back of the frame 4 in the same manner. When applying the foam adhesive, ensure that the strips are straight and wrinkled, and smooth them with your fingers. The joints between the foam adhesive strips in S4 must be tightly closed to prevent foreign objects from entering through gaps. There should be four strips of foam adhesive on both the front and back of the frame; there should be no missed areas. The foam adhesive should not extend beyond the inner edge of the frame. The process of preparing double-sided tape for the upper iron frame 2 is as follows: Take one piece of upper iron frame 2 and... Place the frame with the open side facing up. Tear off a piece of double-sided tape from the roll of double-sided tape. Using the outer edge of the iron frame as a reference, attach the tape from the near side to the front, about 1 mm from the outer edge of the upper iron frame 2, until you reach the outer edge of the other side. After confirming that the double-sided tape is not crooked or wrinkled, cut it with a blade. Then, rotate the upper iron frame 2 90° and attach another piece of double-sided tape from the near side to the front, about 1 mm from the outer edge of the long side. Attach four pieces of double-sided tape to the upper iron frame 2 in this way, with the joints of the double-sided tape tightly pressed together.

[0051] Reference Figure 4 and Figure 7The optical film application sequence is: diffuser film 51, lower brightness enhancement film 53, and upper brightness enhancement film 52, with the frosted surface of diffuser film 51 facing upwards. Before assembling the backlight module, use a dust-removing roller to clean the lower iron frame 1 in both directions, and clean the roller on the dust-removing pad approximately every hour, replacing the dust-removing pad every 2 hours. The film application process involves using a special jig to apply current to the semi-finished product, removing the protective film from the surface of the light guide plate 5, and using a lint-free cloth dampened with alcohol to remove foreign matter, residual adhesive, dirt, and other defects. Then, take one diffuser film 51, with the large tab on the short side facing right, align the tab with the slot in the iron frame, and place it flat, ensuring the frosted surface of diffuser film 51 faces upwards. Then, apply the lower brightness enhancement film 53 and the upper brightness enhancement film 52 in the same manner. After checking that the semi-finished product is free of foreign matter, scratches, film overlap, displacement, and other defects, take a foam adhesive frame 4 with the lower left corner as the reference point. Based on the standard, insert the plastic frame 4 into the lower iron frame 1 along the edge of the iron frame. After confirming that the plastic frame 4 and the lower iron frame 1 are properly engaged and that there are no bright edges on the two short sides when viewed at an angle, place the product on the assembly line into the next work station. The dust removal process of the lower iron frame 1 is as follows: place the lower iron frame 1 on the table, turn on the green light, take one good product from the previous process, place the lower iron frame 1 flat on the table with the frame surface facing up, gently press the lower iron frame 1 with your left hand, and use your right hand to hold the dust roller and roll it 2-3 times along the long side of the lower iron frame 1 from near to front. Rotate the dust roller and remove dust horizontally along the short side of the lower iron frame 1 from near to front. After checking that there are no foreign objects on the inside of the lower iron frame 1, let the lower iron frame 1 flow into the next work station. During the operation, one piece should be processed at a time. Do not stack multiple iron frames together for dust removal. During the operation, be careful not to pull the terminal wires. After cleaning, check that there are no foreign objects on the inside of the lower iron frame and let the lower iron frame flow into the next process.

[0052] Reference Figure 4 and Figure 5 The light strip 13 is installed at a horizontal position on the long side that is farthest from the bottom inner positioning hole 11. The light guide plate 5 is installed with the light-emitting surface facing upwards, and the notch aligned with the lower right corner. The large clip end on the short side of the light guide plate 5 is facing right. Align the clip of the film material with the iron frame slot and place it flat. The process of installing the light strip 13 is as follows: Take one piece of lower iron frame 1, place it horizontally with the frame surface of lower iron frame 1 facing upwards and the long side farthest from the bottom inner positioning hole 11 facing you. Then take one piece of light strip 13, peel off the thermal conductive adhesive release paper, and then... Starting from the broken edge of the left side wall of the iron frame 1, attach the light strip 13 from left to right along the bottom of the lower iron frame 1. After confirming that the light strip 13 is close to the bottom of the lower iron frame 1, press it firmly by hand. After bending the wire of the light strip 13 outside the iron frame, arrange the iron frames neatly. Each stack of 5 pieces flows into the next process. During operation, it is strictly forbidden to bend the light strip at an angle of more than 30°. The light strip must be assembled close to the bottom of the lower iron frame. When stacking products, be careful that the terminal wire of the light strip is not cut or pressed by the cross section of the lower iron frame to avoid damage to the insulation.

[0053] Reference Figure 4 and Figure 7The LCD panel 3 needs to be fixed using a negative pressure suction fixture with a negative pressure value of not less than -40Kp. When assembling the backlight module, the fixture's output current is 220mA, and its voltage power is between 42V and 48V. The test fixture's parameters are set to 5.0. Defective products must be marked and isolated after testing. When attaching the diffusion film 51, the frosted side of the diffusion film 51 should face upwards. The assembly process for the semi-finished product is as follows: turn on the green light, then take one piece of the lower iron frame 1 from the previous process, with the frame surface of the lower iron frame 1 facing upwards, and install... Place the light strip 13 flat on the table with its side facing you. Take a piece of reflective film 54, with its reflective surface facing up and the short side of the small ear facing left. Align it with the short side of the left side of the lower iron frame 1 and the adjacent long side, and place the reflective film 54 flat inside the lower iron frame 1. Then, take a light guide plate 5, with its light-emitting surface facing up and the notched corner facing the lower right corner. Peel off about half of the protective film on the long side of the bottom surface. Align the long side of the light guide plate 5 near you with the lamp opening inside the lower iron frame 1, and peel off the protective film on the bottom surface as you lower it. After confirming that the light guide plate 5 is completely placed, position the light guide plate 5 towards the lamp opening. The semi-finished products are brought together, and then stacked in groups of five to flow into the next process. The process of covering the LCD panel 3 and the upper iron frame 2 is as follows: the semi-finished products are lit up with a special jig, and the backlight surface is checked for foreign objects, scratches, dirt and defects. Then, the suction jig is placed on the upper surface of the LCD panel 3 with the right hand, ensuring that all four suction cups are on the upper polarizer. The hand slide valve is pushed to the left. When the negative pressure gauge shows a negative pressure above -40Kpa, the LCD panel 3 is rotated so that the lower polarizer side is facing up. The lower polarizer protective film of the LCD panel 3 is peeled off from the upper right corner with the left hand. Then, with the T-CON end of the LCD panel 3 facing forward, place the LCD panel 3 flat inside the backlight frame 4 with the lower left corner as the reference. After observing that the four sides of the LCD panel 3 are completely inside the frame 4, slide the suction fixture hand valve backward to remove the fixture. Then peel off the upper polarizer protective film of the LCD panel 3. Take a piece of the pre-processed upper iron frame 2, with its long and wide sides facing forward. Starting from the two corners near the body, snap it forward along the two short sides to complete the snap-fit. After checking that the four sides of the module are completely snapped in place, put the product into the production line and let it flow into the next station.

[0054] The testing steps are as follows: The fixture input voltage is DC12V, and the current is 1-3A. After powering on the fixture and turning on the switch, adjust the parameters using "+" or "-" keys. Once the parameter is adjusted to 5.0, press the confirmation button. Take one module with its lower iron frame 1 facing upwards and the T-CON end of the LCD panel 3 facing forward. Hold the T-CON of the LCD panel 3 with your left hand, and use your right thumb and forefinger to hold the test wire end and insert it into the T-CON connector interface of the LCD panel 3. After confirming there is no misalignment, connect the backlight power terminal to the fixture's boost board interface. Then press the fixture power button and the fixture screen switch button to switch to a white screen. Check the backlight from all angles for defects such as white spots, white marks, black spots, film scratches, film arching, interference lines, bright edges, lamp holes, and light leakage. Then switch to other screens and check the module glass from any angle for defects such as black spots, bright spots, colored spots, bright lines, dark lines, snowflake patterns, murmurs, and pressure marks. Apply masking tape to the defective areas. Defective items are marked, and good products are transferred to the next workstation. The appearance inspection process is as follows: Take one product and place it flat on the workbench with the front side facing up. Check the product surface for dirt, pen marks, fingerprints, foreign objects, etc. If any are found, clean them with a lint-free cloth dampened with alcohol. Then, take another product and check the module surface for dirt, pen marks, scratches, markings, fingerprints; check that the easy-tear sticker is not missing; check that the PET is not over-edge or damaged; check that the iron frame is not deformed; check the back of the product: the adhesive strip is not wrinkled, damaged, or rebounded; check that the glass connector port is not deformed; check that the barcode is not missing, wrinkled, reversed, or blurry; check that the terminal wires are not damaged and the terminals are not deformed; check that the iron frame is not rusted, scratched, or deformed. After the product passes the inspection, take a bag, rub the bag opening open, hold the bag with your right hand and the product with your left hand, making sure the T-CON end is at the bag opening, and put the product into the bag. After the operation, place two screens face to face, and fold the bag opening to the side.

[0055] Reference Figure 4 and Figure 8Packaging materials include transparent PET, masking tape, barcode stickers, packaging bags, polystyrene foam, and packaging boxes. When packaging finished products, modules must be placed face-to-face, bag openings must be folded uniformly, and polystyrene foam clips must be used to secure the packaging inside the carton. The process of applying easy-tear stickers and labels is as follows: Take a product piece and place it flat on the worktable with the front side facing up. Then, take an easy-tear sticker and apply it to the upper right corner of the glass, above the polarizing film protective film. Note that after applying the easy-tear sticker, you need to gently pull it to ensure the protective film can be lifted before restoring it. Then, flip the product over and place it on the back. Take one piece of masking tape and stick it to the product's terminal wires to secure them to the back of the product. Then, take one barcode sticker and apply it to the lower right corner of the iron frame, ensuring the text on the label faces you. The outer packaging process is as follows: Take one carton, open it (with the printed text facing down), fold the two short sides inwards first, then fold the two long sides in half, and use... The sealing machine seals the bottom along the two long sides of the seam, and then seals the two short sides in the same way. Turn the box over, take two pieces of polystyrene foam and place them on the bottom of the box, close to the two sides. Take two pieces of product, with the T-CON edge of the module facing up (the opening of the packaging bag is folded towards the product side), and insert them into one of the cardboard cutters. Fill the box with the specified quantity in the same way. Then take two more polystyrene foam cutters and attach them to the side and top of the product. Seal the top of the box in the same way as described above. Place the entire box on an electronic scale to weigh it, and fill in the actual weight on the line after "gross weight". Place the weighed boxes neatly on a pallet. Have the label confirmed by OQC before attaching it to the upper right corner. After packing, the quantity of each box must be counted to ensure there are no more or fewer than the quantity.

[0056] Reference Figure 4 Except for the material preparation and outer packaging steps, all processes require the wearing of anti-static wrist straps and gloves, and the ion fan must be turned on to level 2 or above. When the operator is pre-processing the frame and assembling the backlight module and integrating the LCD panel, the distance between the operator and the product must be 30±5cm. When the products are stacked, the number of layers cannot exceed five.

[0057] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A liquid crystal display screen based on frame structure optimization, comprising a lower iron frame (1), an upper iron frame (2), and a liquid crystal panel (3), characterized in that: The lower iron frame (1) and the upper iron frame (2) are fastened together, and a plastic frame (4) is connected at the connection between the lower iron frame (1) and the upper iron frame (2). The liquid crystal panel (3) is disposed between the lower iron frame (1) and the upper iron frame (2), and a light guide plate (5) is connected to the side of the liquid crystal panel (3) near the lower iron frame (1). The lower iron frame (1) is provided with two sets of inner positioning holes (11), and six sets of protrusions (12) are provided on both sides of the top front of the lower iron frame (1). A light strip (13) is pasted on the inner side of the front of the lower iron frame (1), and a light strip (13) is connected to the inner side of the wall near the inner positioning hole (11) of the lower iron frame (1). An upper light enhancement film (52), a lower light enhancement film (53), and a diffusion film (51) are attached to the upper part of the light guide plate (5) from top to bottom. A reflective film (54) is provided below the light guide plate (5).

2. A precision assembly process for a liquid crystal display screen based on frame structure optimization, employing the liquid crystal display screen based on frame structure optimization as described in claim 1, characterized in that: Includes the following steps: S1. Material preparation: Take the lower iron frame (1), upper iron frame (2), glue frame (4), LCD panel (3), light guide plate (5), light strip (13), optical film, adhesive material and packaging material; S2, Frame pretreatment: attach silicone pads to the protrusions (12) of the lower iron frame (1), attach silicone pads to the outside of the plastic frame (4), attach foam adhesive to the inner edges of the front and back sides of the plastic frame (4), attach double-sided tape to the edge of the upper iron frame (2), attach black mortar to the outer edge of the back of the lower iron frame (1), and attach light strips (13) to the inner side of one side of the lower iron frame (1). S3. Assemble the backlight module: Install the reflective film (54), light guide plate (5) and optical film layer into the lower iron frame (1) in sequence, and fix them with the glue frame (4); S4. Integrated LCD panel: Place the LCD panel (3) inside the plastic frame (4), fasten the iron frame (2), and fix it with conductive glue and encapsulate the signal terminals; S5. Testing and Packaging: The illuminated modules are tested for functionality, labeled, and then packed into boxes, with a stacking height limited to no more than four layers.

3. The precision assembly process for a liquid crystal display screen based on frame structure optimization according to claim 2, characterized in that: The adhesive materials include silicone pads, conductive adhesive, foam adhesive, double-sided tape, black mortar, and black single-sided tape. The silicone pad attached to the lower iron frame (1) has a size of 15*2*2mm, while the silicone pad attached to the long side of the frame (4) has a size of 15*2*2mm, and the silicone pad attached to the short side of the frame (4) has a size of 15*1.5*2mm. The foam adhesive attached to the long side of the frame (4) has a size of 484*2mm, and the foam adhesive attached to the short side of the frame (4) has a size of 272*2mm.

4. The precision assembly process for a liquid crystal display screen based on frame structure optimization according to claim 3, characterized in that: The foam adhesive is attached to the inner edge of the frame (4) and maintains a 1mm gap from the edge. The foam adhesive is attached from the position 2mm away from the wall of the frame (4) and 1mm from the inner edge along the inner edge of the frame. The double-sided adhesive is attached in groups of four, and the four double-sided adhesives are attached end to end to the outer edge of the upper iron frame (2) at a position 1mm away. The conductive adhesive is attached half to the T-CON copper sheet and half to the lower iron frame (1).

5. The precision assembly process for a liquid crystal display screen based on frame structure optimization according to claim 2, characterized in that: The optical film layer is attached in the following order: diffusion film (51), lower brightness enhancement film (53), and upper brightness enhancement film (52). The frosted surface of the diffusion film (51) faces upward. Before assembling the backlight module, the lower iron frame (1) is cleaned in both directions using a dust roller. The roller is cleaned on the dust pad every hour, and the dust pad is replaced every 2 hours.

6. The precision assembly process for a liquid crystal display screen based on frame structure optimization according to claim 2, characterized in that: The light strip (13) is installed at a horizontal position on the long side that is far from the bottom inner positioning hole (11). The light guide plate (5) is installed with the light-emitting surface facing upwards and the notch aligned with the lower right corner. The light guide plate (5) has a large ear end on the short side facing right. The film material ear is aligned with the iron frame slot and placed flat.

7. The precision assembly process for a liquid crystal display screen based on frame structure optimization according to claim 2, characterized in that: The LCD panel (3) needs to be fixed by a negative pressure suction fixture. The negative pressure value is not lower than -40Kp. When assembling the backlight module, the output current of the fixture is 220mA, and the voltage power of the fixture is between 42V and 48V. The parameters of the test fixture are set to 5.

0. Defective products after testing need to be marked and isolated.

8. The precision assembly process for a liquid crystal display screen based on frame structure optimization according to claim 3, characterized in that: The packaging materials include transparent PET, masking tape, barcode stickers, packaging bags, polystyrene foam, and packaging boxes. When packaging the finished products, the modules must be placed face to face, the bag openings must be folded uniformly, and polystyrene foam clips must be used to secure them inside the carton.

9. The precision assembly process for a liquid crystal display screen based on frame structure optimization according to claim 3, characterized in that: Except for the material preparation and outer packaging steps, all processes require the wearing of anti-static wrist straps and gloves, and the ion fan must be turned on to level 2 or higher. When the operator is pre-processing the frame and assembling the backlight module and integrating the LCD panel, the distance between the operator and the product must be 30±5cm. When the products are stacked, the number of layers cannot exceed five.

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