A method for secondary magnetic bubble relief

Abstract

The application provides a secondary magnetic bubble elimination method, which comprises the following steps: preparing a product to be bubble-eliminated, the product to be bubble-eliminated comprising a display panel, a cover plate and an optical adhesive film attached to the display panel and the cover plate, the optical adhesive film having bubbles to be eliminated; mounting a magnet on the upper surface and the lower surface of the product to be bubble-eliminated at positions corresponding to the bubbles, respectively, the two magnets each having a flat magnetic surface, and the positive and negative poles of the two magnets attracting each other, the bubbles, the optical adhesive film and the cover plate being clamped between the magnetic surfaces of the two magnets; and placing the product to be bubble-eliminated with the mounted magnets into a bubble-removing machine for automatic bubble removal, and converting the product to be bubble-eliminated into a bubble-eliminated product after the bubbles are eliminated. The secondary magnetic bubble elimination method provided by the application can improve the bubble elimination yield and reduce the risk of bubble removal.

Description

Technical Field

[0001] This application belongs to the field of full lamination technology for touch display screens, and more specifically, it relates to a method for secondary magnetic defoaming relief. Background Technology

[0002] In the manufacturing process of touch displays, such as mobile phone touch displays, one of the commonly used materials is OCA (Optical Clear Adhesive). OCA offers numerous advantages, including simple manufacturing processes, high automation, stable quality, high yield, mature and stable material supply with comprehensive functions, uniform adhesive layer thickness, high flatness, a complete and segmented industrial chain, mature production equipment, abundant engineering personnel, and widespread engineering technology; it can be used for soft-to-soft, soft-to-hard, and hard-to-hard bonding, making it widely applicable in engineering; and it boasts high production efficiency, making it suitable for mass production. Therefore, OCA is widely used in full-lamination of screens.

[0003] However, the problem of air bubbles in the optical adhesive film during the manufacturing process has become a persistent issue in the industry. Moreover, as screen sizes increase, the probability of air bubbles forming on the optical adhesive film during full lamination also increases. For example, in the module industry, the defect rate of air bubbles during the first full lamination of the optical adhesive film is approximately 0.6%, and the defect rate after a second high-temperature treatment is approximately 0.35%. This defect rate is relatively high and requires further improvement and remediation. Currently, the industry standard for handling air bubble defects after the second treatment is to use metal clips to clamp the bubbles. However, because clamping bubbles with metal clips involves linear force, meaning the pressure is concentrated along a single line, it easily leads to uneven force distribution, making it difficult to eliminate the bubbles. During the high-temperature debubbling process in the debubbling machine, after the optical adhesive film softens, adhesive overflow can occur at the linear force points. Furthermore, existing defoaming processes using metal clips introduce new problems and adverse conditions. For example, to reduce the stress on the clips, lint-free cloths are placed on top and bottom of the product for cushioning, which introduces new risks, leading to uneven stress and poor defoaming results. When the pressure on the clips is too high, defoaming under high temperature and pressure conditions can easily damage the optical film, causing it to yellow. In summary, existing defoaming methods using metal clips not only have low yield rates but also introduce other adverse risks. Summary of the Invention

[0004] The purpose of this application is to provide a secondary magnetic defoaming method to solve the technical problem that the secondary defoaming rate of bubbles in the display screen is low and easily causes other adverse risks in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a method for secondary magnetic defoaming relief, comprising the following steps:

[0006] Prepare the defoaming and relief products, which include the display panel, cover plate, and optical adhesive film that adheres to the display panel and cover plate, with air bubbles to be eliminated on the optical adhesive film;

[0007] Magnets are installed on the upper and lower surfaces of the product to be defoamed, at the corresponding positions of the bubbles. Both magnets have flat magnetic surfaces and their positive and negative poles attract each other. The bubbles are located between the magnetic surfaces of the two magnets.

[0008] The product to be defoamed and treated with magnets installed is placed in a defoaming machine for automatic defoaming. After the bubbles are eliminated, the product is transformed into a defoamed product.

[0009] Optionally, the step of attaching magnets to the upper and lower surfaces of the product to be defoamed at the corresponding positions of the air bubbles includes:

[0010] On the lower surface of the product to be defoamed, place a magnet next to the corresponding position of the bubble on the side of the lower surface of the product to be defoamed, with the magnetic side of the magnet facing upward and in contact with the lower surface of the product to be defoamed.

[0011] On the upper surface of the product to be defoamed, place another magnet next to the corresponding position of the bubble. The magnetic side of the magnet faces down and is attached to the lower surface of the product to be defoamed. The two magnets are staggered vertically.

[0012] Slowly bring the two magnets closer together from the corresponding edges of the bubble until the positive and negative poles of the two magnets attract each other, and the attraction between the two magnets acts on the bubble.

[0013] Optionally, on the product to be defoamed and relieved, with the magnets installed, the two magnets are coaxial, with the bubble located at the center of the magnets.

[0014] Optionally, the magnet is in the shape of a flat cylinder with a diameter of 15 mm and a height of 5 mm.

[0015] Optionally, the magnet is a neodymium iron boron high-power magnet with a three-layer electroplated nickel-copper-nickel coating.

[0016] Optionally, before the step of attaching magnets to the upper and lower surfaces of the product to be defoamed at the corresponding positions of the bubbles, the method further includes the step of placing a protective film on the upper surface of the cover plate and placing the magnets on the protective film at the corresponding positions of the bubbles.

[0017] Optionally, the process of automatically defoaming the product to be defoamed, with the magnet installed, in a defoaming machine includes the following steps:

[0018] The parameters of the defoaming machine should be selected according to the model of the product to be defoamed;

[0019] Confirm that the magnets are installed in the corresponding positions of the bubbles in the product to be defoamed, and place the product flat on the steel plate of the defoaming machine cavity;

[0020] Close the safety door of the degassing machine and confirm that there is no abnormality in the safety latch. Press the start button to start the automatic degassing mode.

[0021] Optionally, after the step of placing the product to be defoamed with the magnet installed into the defoaming machine for automatic defoaming, the following steps are also included: inspecting and curing the defoamed product.

[0022] Optionally, the steps for inspecting and curing the defoamed product include the following sub-steps:

[0023] Perform a visual inspection on the defoamed product to confirm whether the bubbles have been eliminated. If the bubbles have been eliminated, the product is considered a qualified defoamed product.

[0024] The qualified defoaming products are cured with ultraviolet light using an ultraviolet curing machine.

[0025] Optionally, before the secondary magnetic defoaming method is implemented in formal production, the following tests are also required:

[0026] After the qualified defoaming product has been left to stand for 72 hours, check for any bubble rebound.

[0027] Electrical testing was performed on qualified defoaming products to confirm that no defects were detected.

[0028] Disassemble qualified defoaming products to confirm that the optical adhesive film has no deformation or abnormality at the corresponding positions of the bubbles;

[0029] The qualified defoamed products were subjected to yellowing defect testing to verify that there was no risk of yellowing.

[0030] The qualified defoaming products were subjected to high-temperature storage test, high-temperature and high-humidity test, and thermal shock test to confirm that there were no abnormalities in electrical tests and appearance, and the material performance test was confirmed to be qualified.

[0031] The beneficial effects of the secondary magnetic defoaming and relief method provided in this application are as follows: This secondary magnetic defoaming and relief method utilizes the principle of attraction between opposite poles of magnets on a flat magnetic surface to apply uniform pressure to the air bubbles on the product to be defoamed and relieved, and then uses a defoaming machine to remove the air bubbles from the optical film. Therefore, compared with the currently common secondary defoaming and relief method of clamping air bubbles with iron clips, this method can avoid problems such as poor defoaming effect, deformation and overflow of optical film, and damage to optical film caused by linear force. At the same time, it does not require a lint-free cloth to pad, so that the air bubbles under uniform magnetic pressure can be smoothly discharged, thereby improving the air bubble relief yield and reducing other risks. In other words, this method increases the air bubble pressure through magnetic attraction for defoaming, and because the magnetic surface is flat, the corresponding position of the air bubble is in a uniform pressure state with a single point surface force, which can greatly improve the air bubble relief rate, reduce product disassembly costs and material scrap costs, and thus help break through industry bottlenecks, greatly alleviate the defoaming dilemma of full lamination in the module industry, strive for greater profit margins, and better meet customer needs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A flowchart illustrating the secondary magnetic defoaming relief method provided in this application embodiment;

[0034] Figure 2 A cross-sectional view of the product to be defoamed and relieved, with the magnet installed, provided in an embodiment of this application;

[0035] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0036] Explanation of icon numbers:

[0037] 110 Display panel 120 cover plate 130 Optical film 131 bubble 200 magnet 300 Protective film Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0039] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0040] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of this application are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0045] This application provides a method for secondary magnetic defoaming relief.

[0046] Please see Figures 1 to 3In one embodiment, the secondary magnetic defoaming relief method includes the following steps:

[0047] S10. Prepare the product to be defoamed and removed. The product to be defoamed and removed includes a display panel 110, a cover plate 120, and an optical adhesive film 130 that adheres to the display panel 110 and the cover plate 120. The optical adhesive film 130 has air bubbles 131 to be removed.

[0048] S20. On the upper and lower surfaces of the product to be defoamed, magnets 200 are respectively installed at the corresponding positions of the bubbles 131. Both magnets 200 have flat magnetic attraction surfaces, and the positive and negative poles attract each other. The bubbles 131 are located between the magnetic attraction surfaces of the two magnets 200.

[0049] S30. Place the product to be defoamed and treated with magnet 200 installed into the defoaming machine for automatic defoaming. After the bubbles 131 are eliminated, the product to be defoamed and treated is transformed into a defoamed product.

[0050] Based on this design, in this embodiment, the secondary magnetic defoaming and relief method utilizes the principle of attraction between opposite poles of the flat magnetic surface and the magnet 200 to apply uniform pressure to the air bubbles 131 on the product to be defoamed and relieved. Then, a defoaming machine is used to remove the air bubbles 131 from the optical film 130. Therefore, compared with the currently common secondary defoaming and relief method of clamping air bubbles with iron clips, this method can avoid problems such as poor defoaming effect, deformation and overflow of the optical film 130, and damage to the optical film 130 caused by linear force. At the same time, it does not require a lint-free cloth to pad, so that the air bubbles 131 under uniform magnetic pressure can be smoothly discharged, thereby improving the yield of air bubble 131 relief and reducing other risks. In other words, this method uses magnets 200 to attract and increase the pressure of bubbles 131 for degassing. Because the magnetic attraction surface is flat, the corresponding position of bubble 131 is in a uniform pressure state with single-point surface force, which can greatly improve the relief rate of bubble 131, reduce product disassembly costs and material scrap costs, and thus help break through industry bottlenecks, greatly alleviate the full-lamination defoaming dilemma in the module industry, strive for greater profit margins, and better meet customer needs.

[0051] It should be further explained that the display panel 110 in this embodiment is specifically the display panel 110 of a mobile phone touch screen. In the product to be defoamed, the display panel 110 and the cover plate 120 are stacked one on top of the other, and the optical adhesive film 130 is disposed between the display panel 110 and the cover plate 120. The optical adhesive film 130 is first bonded to the side of the cover plate 120 facing the display panel 110, and then the display panel 110 is bonded to the optical adhesive film 130. In this way, the display panel 110 and the cover plate 120 can be connected together through the optical adhesive film 130. Here, the reduction in material scrap costs is mainly due to the cost savings of the optical adhesive film 130 and the cover plate 120.

[0052] Further, please refer to Figure 2 In this embodiment, the step of attaching magnets 200 to the corresponding positions of bubbles 131 on the upper and lower surfaces of the product to be defoamed includes: First, placing a magnet 200 on the lower surface of the product to be defoamed, next to the corresponding position of bubble 131, with the magnetic attraction surface of the magnet 200 facing upwards and in contact with the lower surface of the product to be defoamed; then, placing another magnet 200 on the upper surface of the product to be defoamed, next to the corresponding position of bubble 131, with the magnetic attraction surface of the magnet 200 facing downwards and in contact with the lower surface of the product to be defoamed, and the two magnets 200 are staggered vertically; then, slowly bringing the two magnets 200 closer together from the edge of the corresponding position of bubble 131 until the positive and negative poles of the two magnets 200 attract each other, and the attraction force generated between the two magnets 200 acts on bubble 131. It is understandable that, since the magnets 200 used in this method are hard but brittle components, collisions and drops should be avoided as much as possible. Therefore, when installing the magnets 200, collisions and breakage caused by attraction from a distance should be avoided as much as possible. Thus, the two magnets 200 need to slowly approach each other from the corresponding edges of the bubble 131, eventually achieving positive and negative attraction from top to bottom. In this way, when the two magnets 200 attract each other from top to bottom, the magnetic field lines intertwine to form a magnetic field, causing the attraction between the magnets 200 to act on the bubble 131.

[0053] Please see Figure 2 and Figure 3 In this embodiment, on the product to be defoamed after the magnets 200 are installed, the two magnets 200 are coaxial vertically, and the bubble 131 is located at the center of the magnets 200. In other words, when applying this secondary magnetic defoaming method, the positions of the upper and lower magnets 200 must be consistent and fully cover the area where the bubble 131 is located. The corresponding position of the bubble 131 is preferably at the center of the magnet 200. This makes the magnetic pressure on the bubble 131 more evenly distributed, resulting in a better defoaming effect in the defoaming machine. In some special cases, such as when the bubble 131 is too large, the bubble 131 can be squeezed and concentrated in the same area by pressing with a finger for magnetic bubble clamping.

[0054] Specifically, in this embodiment, the magnet 200 is a flat cylindrical shape with a diameter of 15mm and a height of 5mm. It is understood that the magnet 200 installed at the corresponding position of the bubble 131 should be of a suitable size and magnetic force to facilitate better defoaming effect. Here, for a mobile phone touchscreen display, a flat cylindrical magnet 200 with a diameter of 15mm and a height of 5mm is a preferred and suitable size, achieving a good defoaming effect. Moreover, this structural design prevents the magnet 200 from causing punctures or scratches to the surface of the product when it comes into contact with the product to be defoamed. Of course, in other embodiments, the shape and size of the magnet 200 can be set according to actual needs, but the condition of a flat magnetic surface must still be met.

[0055] Furthermore, in this embodiment, the magnet 200 is a neodymium iron boron (NdFeB) high-strength magnet 200, and has a three-layer electroplated nickel-copper-nickel coating. This coating has rust-proof and corrosion-proof functions. Since the magnet 200 is a flat cylindrical shape, to ensure that the positive and negative poles attract each other in the vertical direction, the magnetization direction of the magnet 200 is thickness magnetization, that is, magnetization along the height direction of the magnet 200, i.e., the vertical direction. In addition, in this embodiment, the magnet 200 is a type that never demagnetizes at room temperature, and its maximum operating temperature is 80°C. Of course, in other embodiments, high-temperature magnets 200 can also be customized according to actual process requirements.

[0056] It should be noted that, in this embodiment, before the step of attaching magnets 200 to the upper and lower surfaces of the product to be defoamed at the corresponding positions of bubbles 131, the method further includes: placing a protective film 300 on the upper surface of the cover plate 120, and placing the magnets 200 on the protective film 300 at the corresponding positions of bubbles 131. Specifically, the protective film 300 can be, but is not limited to, a PET (Polyethylene terephthalate, thermoplastic polyester) film, and its thickness is preferably 0.1 mm. The protective film 300 covers the cover plate 120, mainly to prevent the magnets 200 from scratching the product to be defoamed.

[0057] Specifically, in this embodiment, the steps of placing the product to be defoamed and repaired with the magnet 200 installed into the defoaming machine for automatic defoaming include the following sub-steps: First, set the parameters of the defoaming machine according to the model of the product to be defoamed and repaired; then, confirm that the magnet 200 is installed on the product to be defoamed and repaired at the corresponding position of the bubble 131, and place the product to be defoamed and repaired flat on the steel plate of the chamber of the defoaming machine; finally, close the safety door of the defoaming machine and confirm that there is no abnormality in the safety bolt, and press the start button to start the automatic defoaming mode. Here, the principle of the defoaming machine is to use pressure and temperature to remove the bubbles 131 on the optical film 130. The parameters of the defoaming machine include temperature, holding time, pressure setting, etc., and its defoaming process can be single-stage or multi-stage defoaming, depending on the actual situation.

[0058] Furthermore, in this embodiment, after the step of automatically defoaming the product to be defoamed with the magnet 200 installed in the defoaming machine, the following steps are also included: inspecting and curing the defoamed product. Specifically, the steps of inspecting and curing the defoamed product include the following sub-steps: First, visually inspect the defoamed product to confirm whether the bubbles 131 have been eliminated. If the bubbles 131 have been eliminated, the product is deemed a qualified defoamed product. Then, the qualified defoamed product is cured with ultraviolet light using an ultraviolet curing machine. Here, ultraviolet curing, or UV curing, can cause the optical adhesive film 130 to undergo a cross-linking reaction, thereby firmly bonding the display panel 110 and the cover plate 120 together.

[0059] It should also be noted that, in this embodiment, the secondary magnetic defoaming and relief method requires numerous tests before being implemented in formal production to assess and confirm that the method will not generate reliability risks or hidden dangers. For example, the qualified defoamed product is left to stand for 72 hours to check for the rebound of bubbles 131. Specifically, during the standing process, it is checked every 24 hours. If no bubbles 131 rebound after 72 hours, it is considered qualified. The qualified defoamed product is then subjected to electrical testing to confirm that no display-related defects occur. For example, electrical testing can be used to confirm whether there are abnormalities such as yellowing or red / blue spots at the corresponding positions of bubbles 131. The qualified defoamed product is then disassembled to confirm that the optical adhesive film 130 is not deformed at the corresponding positions of bubbles 131. This test is mainly used to determine that the secondary magnetic defoaming and relief method will not cause the risk of deformation and overflow of the optical adhesive film 130. The qualified defoamed products undergo a yellowing defect test to verify no yellowing risk. Specifically, the defoamed products are placed on a heating platform with the cover plate facing down at 120°. Under the test conditions of 60°C and a heating time of 3 minutes, if no yellowing defect is found on a white screen within 8 seconds of electrical testing, it meets customer requirements. Qualified defoamed products are then subjected to high-temperature storage tests, high-temperature and high-humidity tests, and thermal shock tests to confirm that there are no abnormalities in electrical testing and appearance, and that material performance tests are qualified. Of course, these tests are not performed during formal production. In other words, only after these tests are passed, confirming that this secondary magnetic defoaming method will not pose any reliability risks or hidden dangers to the display screen product, can this secondary magnetic defoaming method be applied to normal operation. Thus, after defoaming in the defoaming machine, if the defoamed products pass the appearance inspection, they can directly enter the UV curing machine for UV curing and subsequent good product follow-up treatment.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for secondary magnetic defoaming relief, characterized in that, Includes the following steps: Prepare the product to be defoamed and ... Magnets are installed on the upper and lower surfaces of the product to be defoamed, at the corresponding positions of the bubbles. Both magnets have flat magnetic surfaces and their positive and negative poles attract each other. The bubbles are located between the magnetic surfaces of the two magnets. The product to be defoamed and treated, with the magnet installed, is placed in a defoaming machine for automatic defoaming. After the bubbles are eliminated, the product to be defoamed and treated is transformed into a defoamed product. The step of attaching magnets to the upper and lower surfaces of the product to be defoamed at the corresponding positions of the bubbles includes: On the lower surface of the product to be defoamed and repaired, a magnet is placed next to the corresponding position of the bubble, with the magnetic attraction surface of the magnet facing upward and in contact with the lower surface of the product to be defoamed and repaired. On the upper surface of the product to be defoamed and relieved, another magnet is placed next to the corresponding position of the bubble. The magnetic attraction surface of the magnet faces down and is attached to the lower surface of the product to be defoamed and relieved. The two magnets are staggered vertically. The two magnets are slowly brought closer together from the corresponding edges of the bubble until the positive and negative poles of the two magnets attract each other, and the attraction between the two magnets acts on the bubble. On the product to be defoamed after the magnets are installed, the two magnets are coaxial, and the bubble is located at the center of the magnets. The positions of the two magnets are consistent and fully cover the area where the bubble is located.

2. The secondary magnetic defoaming and relief method as described in claim 1, characterized in that, The magnet is a flat cylindrical shape with a diameter of 15mm and a height of 5mm.

3. The secondary magnetic defoaming and relief method as described in claim 1, characterized in that, The magnet is a neodymium iron boron high-power magnet with three layers of electroplated nickel, copper and nickel plating.

4. The secondary magnetic defoaming and relief method as described in any one of claims 1 to 3, characterized in that, Before the step of attaching magnets to the upper and lower surfaces of the product to be defoamed at the corresponding positions of the bubbles, the method further includes the step of placing a protective film on the upper surface of the cover plate, and placing the magnets on the protective film at the corresponding positions of the bubbles.

5. The secondary magnetic defoaming and relief method as described in any one of claims 1 to 3, characterized in that, The step of placing the product to be defoamed, with the magnet installed, into the defoaming machine for automatic defoaming includes the following sub-steps: The parameters of the defoaming machine are selected according to the model of the product to be defoamed; Confirm that the magnets are installed at the corresponding positions of the bubbles in the product to be defoamed and placed flat on the steel plate of the chamber of the defoaming machine; Close the safety door of the degassing machine and confirm that there is no abnormality in the safety latch, then press the start button to start the automatic degassing mode.

6. The secondary magnetic defoaming and relief method as described in claim 5, characterized in that, After the step of placing the product to be defoamed with the magnet installed into the defoaming machine for automatic defoaming, the following steps are also included: inspecting and curing the defoamed product.

7. The secondary magnetic defoaming and relief method as described in claim 6, characterized in that, The steps for inspecting and curing the defoamed product include the following sub-steps: The defoaming completed product is visually inspected to confirm whether the bubbles have been eliminated. If the bubbles are eliminated, the defoaming completed product is deemed qualified. The qualified defoaming products are cured with ultraviolet light using an ultraviolet curing machine.

8. The secondary magnetic defoaming and relief method as described in claim 6, characterized in that, Before the secondary magnetic defoaming and relief method is implemented in formal production, the following tests are required: After the qualified defoaming product has been left to stand for 72 hours, check whether there is any bubble rebound. Electrical testing was performed on the qualified defoaming products to confirm that no display defects occurred. The qualified defoaming completed product is disassembled to confirm that the optical film has no abnormal deformation at the corresponding position of the bubble; The qualified defoamed products were subjected to yellowing defect testing to verify that there was no risk of yellowing. The qualified defoaming products were subjected to high-temperature storage tests, high-temperature and high-humidity tests, and thermal shock tests to confirm that there were no abnormalities in electrical tests and appearance, and that the material performance tests were qualified.

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