Large-size display screen cell repairing method

Abstract

The invention provides a large-size display screen cell repairing method, which comprises the following steps of: acquiring the position of a defective cell on a display screen, and sealing and curing a terminal area of the defective cell by using UV (Ultraviolet) glue to form a protective film; selecting a demolding liquid according to the UV glue, soaking and stripping the display screen subjected to glue sealing, and cleaning and drying the soaked display screen after a film layer on the surface of the defective cell is removed; the polishing slurry is evenly smeared on the surface of the defective cell, and the surface of the defective cell is polished and repaired through a polishing cloth wheel; and cleaning the defective cell by using absolute ethyl alcohol. According to the large-size display screen Cell repairing method, high feasibility and effectiveness are achieved when related problems of Ce11 defects are processed, cost increase caused by waste of defective products can be effectively reduced on the premise that the quality of the display screen is guaranteed, and production benefits are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of display screens, and in particular relates to a cell repair method for a large-size display screen. Background Art

[0002] In the production process of large-size display screens, various defects are inevitable due to the complex manufacturing process. For example, in the Cell (liquid crystal box) process, problems such as liquid crystal leakage, bright spots, dark spots, and Mura (uneven brightness) may occur. The causes of these defects are varied. It may be that during the manufacturing process of the glass substrate, there are particulate impurities on the surface, which leads to problems with the encapsulation of the liquid crystal layer, which in turn causes liquid crystal leakage; or during the manufacturing process of thin-film transistors (TFTs), due to deviations in processes such as photolithography and etching, the display of pixels is abnormal, forming bright spots or dark spots. Among them, the Ce11 of some large-size display products will have problems such as surface oxidation and slight scratches, resulting in poor welding and unstable signal transmission, and repair processing is required to meet product quality standards and reduce cost losses. Summary of the invention

[0003] In view of this, the present invention aims to provide a large-size display screen cell repair method to solve the repair problem when Ce11 of some large-size display screen products has surface oxidation and slight scratches and other defects.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A large-size display cell repair method, comprising:

[0006] Obtaining the position of the defective cell on the display screen, and using UV glue to seal and cure the terminal area of ​​the defective cell to form a protective film;

[0007] Selecting a stripping liquid according to the UV glue, soaking the sealed display screen to remove the film layer, removing the film layer on the surface of the defective cell, and then cleaning and drying the soaked display screen;

[0008] Apply the polishing slurry evenly on the defective cell surface, and use the polishing cloth wheel to polish and repair the defective cell surface;

[0009] Use anhydrous ethanol to clean the defective cells, remove the polishing slurry and UV glue, and then dry;

[0010] Re-coat the display.

[0011] Further, the obtaining of the position of the defective cell on the display screen and using UV glue to seal and cure the terminal area of ​​the defective cell to form a protective film includes:

[0012] Use optical inspection equipment to scan the display screen to identify and locate the defective cells;

[0013] The terminal area of ​​the defective cell is sealed and cured by using UV glue to form a protective film.

[0014] Furthermore, the step of sealing and curing the terminal area of ​​the defective cell with UV glue to form a protective film includes:

[0015] Use a dispensing machine, adjust the dispensing needle to 0.2 mm, set the dispensing pressure to 0.3 MPa, and the dispensing speed to 5 mm / s, and dispense glue on the terminal area of ​​the defective cell to obtain a UV glue layer that evenly covers the terminal area of ​​the defective cell;

[0016] The glue-dispensed display screen is placed in a UV curing device to cure the UV glue layer in the defective cell terminal area to form a protective film.

[0017] Furthermore, the thickness of the UV adhesive layer is 0.5 mm.

[0018] Further, the stripping liquid is selected according to the UV glue, the sealed display screen is immersed in the film, the film layer on the surface of the defective cell is removed, and the immersed display screen is cleaned and dried, including:

[0019] Selecting a stripping liquid according to the UV glue, and placing the sealed display screen into a soaking tank containing the stripping liquid for soaking; wherein the soaking tank is shaken once every 2 minutes;

[0020] Rinse the soaked display screen with deionized water to remove the residual stripping liquid;

[0021] Place the cleaned display screen in a dust-free drying oven and blow dry it with nitrogen.

[0022] Furthermore, the step of evenly applying the polishing slurry on the defective cell surface and polishing and repairing the defective cell surface using a polishing cloth wheel includes:

[0023] Apply alumina polishing slurry with a particle size of 5 μm evenly on the surface of the defective cell;

[0024] The display screen was fixed on the workbench of the automatic polishing machine, the polishing pressure was set to 80g, the polishing speed was set to 800 rpm, and the defective cell surface was polished and repaired using a polishing cloth wheel; the polishing effect was checked using a microscope every 30 seconds.

[0025] Furthermore, the method of cleaning the defective cells with anhydrous ethanol, removing the polishing slurry and UV glue, and then drying includes:

[0026] Use a non-woven cloth dipped in anhydrous ethanol to wipe the surface of the defective cell, remove the polishing slurry and UV glue, put the display screen in a dust-free drying box, and blow dry it with nitrogen.

[0027] Compared with the prior art, the large-size display screen Cell repair method described in the present invention has the following advantages:

[0028] The large-size display screen Cell repair method described in the present invention has high feasibility and effectiveness in dealing with Ce11 defect-related issues. It can effectively reduce the cost increase caused by the discard of defective products while ensuring the quality of the display screen, improve production efficiency, and provide a useful reference and reference for the repair work in the production process of similar display screens. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 The present invention is a flowchart of a large-size display screen Cell repair method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0032] The embodiment of the present invention provides a method for repairing a cell of a large-size display screen. Figure 1 As shown, the specific steps include:

[0033] Step 101: Obtain the position of a defective cell on a display screen, and use UV glue to seal and cure the terminal area of ​​the defective cell to form a protective film.

[0034] Specifically, the display screen may be scanned by optical detection equipment to identify and locate the position of the defective cell, and then the terminal area of ​​the defective cell may be sealed and cured by UV glue to form a protective film.

[0035] In actual application, high-precision optical inspection equipment can be used to conduct a comprehensive scan of large-size display screens. This equipment can keenly capture the defect information of the display screen at the pixel level, whether it is a tiny bright spot, a dark spot, or an uneven distribution of liquid crystal. Once a defect is detected, the advanced image recognition algorithm and the precise coordinate positioning system are used to lock the cell position where the defect is located with micron-level accuracy, and record its coordinate information in detail. For example, through deep learning algorithms, the detection image can be deeply analyzed, the characteristics of abnormal pixels can be accurately identified, and then the center coordinates and boundary range of the defect area can be determined, and the positioning accuracy can be as high as micron level.

[0036] Preferably, when the terminal area of ​​the defective cell is sealed and cured with UV glue to form a protective film, a dispensing machine can be used first, and the dispensing needle is adjusted to 0.2 mm, the dispensing pressure is set to 0.3 MPa, and the dispensing speed is 5 mm / s, and dispensing is performed on the terminal area of ​​the defective cell to obtain a UV glue layer that uniformly covers the terminal area of ​​the defective cell. Then, the display screen after dispensing is placed in a UV curing device to cure the UV glue layer in the terminal area of ​​the defective cell to form a protective film.

[0037] In actual application, you can choose professional UV glue for display screens, which has good acid and alkali resistance, high transparency and good compatibility with Ce11 terminal materials. By using a high-precision dispensing machine, adjust the dispensing needle to 0.2mm, set the dispensing pressure to 0.3MPa, and the dispensing speed to 5mm / s. Dispense glue in the Ce11 terminal area to ensure that the glue evenly covers the terminal, the glue layer thickness is 0.5mm, and there are no bubbles or glue shortages. When the dispensing is completed, put the display screen into the UV curing equipment and set the light intensity to 1500mW / cm 2 The illumination time is 60s, so that the UV glue can be completely cured to form a stable protective film.

[0038] Step 102: Select a stripping liquid according to the UV glue, soak the sealed display screen to remove the film, remove the film layer on the surface of the defective cell, and then clean and dry the soaked display screen.

[0039] Specifically, firstly, a stripping liquid is selected according to the UV glue, and the sealed display screen is placed in a soaking tank containing the stripping liquid for soaking; wherein, the soaking tank is shaken once every 2 minutes. Then, the soaked display screen is rinsed with deionized water to remove the residual stripping liquid. Finally, the cleaned display screen is placed in a dust-free drying box and dried with nitrogen.

[0040] In actual application, a special stripping liquid is selected for the UV glue used. The film is stripped by immersion. The stripping liquid is poured into a glass immersion tank, and the sealed display screen is placed in the immersion tank for 10 minutes. During the immersion process, the immersion tank is gently shaken every 2 minutes to promote the full reaction between the stripping liquid and the film layer. After the immersion is completed, carefully remove the display screen and immediately rinse it with a large amount of deionized water for 3 minutes to remove the residual stripping liquid, then place it in a dust-free drying oven and blow it dry with nitrogen to ensure that the surface of the display screen is dry and free of impurities.

[0041] Step 103: evenly apply the polishing slurry on the defective cell surface, and use a polishing cloth wheel to polish and repair the defective cell surface.

[0042] Specifically, first, alumina polishing slurry with a particle size of 5 μm was evenly applied to the defective cell surface. Then, the display screen was fixed on the workbench of the automatic polishing machine, the polishing pressure was set to 80g, the polishing speed was set to 800 rpm, and the defective cell surface was polished and repaired using a polishing cloth wheel; wherein, the polishing effect was checked every 30 seconds using a microscope.

[0043] In actual application, alumina polishing slurry with a particle size of 5 μm can be used and evenly applied on the surface of Ce11 with a coating amount of 0.2 g / cm 2 The display was then fixed on the workbench of the automatic polishing machine, with the polishing pressure set to 80g and the polishing speed set to 800 rpm. The Ce11 surface was polished using a soft polishing cloth wheel for 3 minutes. During the polishing process, the polishing effect was checked under a microscope every 30 seconds, with a focus on the removal of the oxide layer and scratches, and attention was paid to whether the ITO layer of the display had any signs of damage.

[0044] Step 104: clean the defective cells with anhydrous ethanol, remove the polishing slurry and UV glue, and then dry.

[0045] Specifically, the defective cell surface can be wiped with a non-woven cloth dipped in anhydrous ethanol, and after removing the polishing slurry and UV glue, the display screen is placed in a dust-free drying box and blown dry with nitrogen.

[0046] In actual application, after polishing is completed, gently wipe the surface of the Ce11 terminal with a non-woven cloth dipped in anhydrous ethanol to remove residual polishing slurry and impurities, and then put it into the dust-free drying oven again to dry for 5 minutes.

[0047] Step 105: re-coat the display screen.

[0048] In actual application, re-coating can be performed according to design requirements. For example, tin-lead alloy coating materials can be prepared and vacuum coating equipment parameters can be set. Specifically, the evaporation rate can be set to 2nm / s, the coating time to 120s, and the coating thickness target to 200nm. Then put the display screen into the working chamber of the vacuum coating equipment, and start the coating operation after vacuuming to 5×10-3Pa. In the coating process, the coating thickness is monitored in real time by the film thickness monitoring system provided by the equipment to ensure the uniformity and thickness accuracy of the coating.

[0049] When the coating is completed, wait for the pressure in the working chamber to return to normal, and then take out the display screen. Use a professional welding performance tester and signal analyzer to test the performance of the coated Ce11 terminal to ensure good welding performance, stable signal transmission, and that all indicators can meet product quality standard requirements.

[0050] Through the above repair process, the Ce11 defect problem of large-size display screens can be repaired, and it can be ensured that the repaired display screen will not have any adverse phenomena caused by the Ce11 defect in subsequent aging tests and finished product sampling.

[0051] The large-size display screen Cell repair method described in the present invention has high feasibility and effectiveness in dealing with Ce11 defect-related issues. It can effectively reduce the cost increase caused by the discard of defective products while ensuring the quality of the display screen, improve production efficiency, and provide a useful reference and reference for the repair work in the production process of similar display screens.

[0052] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for repairing a cell of a large-size display screen, characterized in that: include: Obtaining the position of the defective cell on the display screen, and using UV glue to seal and cure the terminal area of ​​the defective cell to form a protective film; Selecting a stripping liquid according to the UV glue, soaking the sealed display screen to remove the film layer on the surface of the defective cell, and then cleaning and drying the soaked display screen; Apply the polishing slurry evenly on the defective cell surface, and use the polishing cloth wheel to polish and repair the defective cell surface; Use anhydrous ethanol to clean the defective cells, remove the polishing slurry and UV glue, and then dry; Re-coat the display.

2. A large-size display cell repair method according to claim 1, characterized in that: The method of obtaining the position of the defective cell on the display screen and using UV glue to seal and cure the terminal area of ​​the defective cell to form a protective film includes: Use optical inspection equipment to scan the display screen to identify and locate the defective cells; The terminal area of ​​the defective cell is sealed and cured by using UV glue to form a protective film.

3. A large-size display cell repair method according to claim 2, characterized in that: The step of sealing and curing the terminal area of ​​the defective cell with UV glue to form a protective film includes: Use a dispensing machine, adjust the dispensing needle to 0.2 mm, set the dispensing pressure to 0.3 MPa, and the dispensing speed to 5 mm / s, and dispense glue on the terminal area of ​​the defective cell to obtain a UV glue layer that evenly covers the terminal area of ​​the defective cell; The glue-dispensed display screen is placed in a UV curing device to cure the UV glue layer in the defective cell terminal area to form a protective film.

4. A large-size display cell repair method according to claim 3, characterized in that: The thickness of the UV adhesive layer is 0.5 mm.

5. A large-size display cell repair method according to claim 1, characterized in that: The method of selecting a stripping liquid according to the UV glue, soaking and stripping the sealed display screen, removing the film layer on the surface of the defective cell, and then cleaning and drying the soaked display screen includes: Selecting a stripping liquid according to the UV glue, and placing the sealed display screen into a soaking tank containing the stripping liquid for soaking; wherein the soaking tank is shaken once every 2 minutes; Rinse the soaked display screen with deionized water to remove the residual stripping liquid; Place the cleaned display screen in a dust-free drying oven and blow dry it with nitrogen.

6. A large-size display cell repair method according to claim 1, characterized in that: The polishing slurry is evenly applied on the defective cell surface, and the defective cell surface is polished and repaired by using a polishing cloth wheel, including: Apply alumina polishing slurry with a particle size of 5 μm evenly on the surface of the defective cell; The display screen was fixed on the workbench of the automatic polishing machine, the polishing pressure was set to 80g, the polishing speed was set to 800 rpm, and the defective cell surface was polished and repaired using a polishing cloth wheel; the polishing effect was checked using a microscope every 30 seconds.

7. A large-size display cell repair method according to claim 1, characterized in that: The method of cleaning the defective cells with anhydrous ethanol, removing the polishing slurry and UV glue, and then drying includes: Use a non-woven cloth dipped in anhydrous ethanol to wipe the surface of the defective cell, remove the polishing slurry and UV glue, put the display screen in a dust-free drying box, and blow dry it with nitrogen.

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