A display device, a manufacturing method thereof, and an electronic device

Abstract

The present application discloses a display device, a manufacturing method thereof, and an electronic device. By providing a bubble release area with a relatively low curing rate in the adhesive layer for bonding the display panel and the cover plate, the adhesive located in the bubble release area can maintain good fluidity. This enables the bubbles generated after the display device undergoes a waterproof performance test to be released through the adhesive in the bubble release area, improving the problem that bubbles appear in the display device and cannot be released. At the same time, the adhesive outside the bubble release area in the adhesive layer maintains a relatively high curing rate, ensuring the bonding performance of the adhesive layer. A recessed area is provided on the side of the cover plate facing the adhesive layer, so that the adhesive with relatively high fluidity can fill into the recessed area to release the bubbles outward, increasing the release space for the bubbles and improving the problem that the bubbles cannot be released.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and more particularly, to a display device, a manufacturing method thereof, and an electronic device. Background Art

[0002] With the continuous improvement of living standards, users have higher and higher requirements for the sealing performance of various display devices. Currently, various display devices will undergo different types of waterproof performance tests before leaving the factory. During the test process, due to the high-pressure and high-humidity test environment, bubbles are likely to appear in the display device and are not easily dissipated, resulting in defective display devices. Summary of the Invention

[0003] To solve the above technical problems, the present application provides a display device, a manufacturing method thereof, and an electronic device to improve the problem that bubbles appear in the display device and are not easily dissipated during the waterproof performance test.

[0004] To achieve the above technical purpose, the embodiments of the present application provide the following technical solutions:

[0005] In a first aspect, a display device is provided, including:

[0006] a display panel and a cover plate located on one side of the display panel in the light-emitting direction;

[0007] an adhesive layer located between the cover plate and the display panel, the adhesive layer including a bubble release area; in the adhesive layer, the curing rate of the adhesive in the bubble release area is less than the curing rate of the adhesive in other areas, and the bubble release area extends from the inside of the adhesive layer to the edge of the adhesive layer.

[0008] Optionally, at least one concave area is included on one side of the cover plate facing the adhesive layer.

[0009] By providing at least one concave area on one side of the cover plate facing the adhesive layer, the concave area expands the flow space of the adhesive with a lower curing rate and higher fluidity, increases the bubble release space, and improves the problem that bubbles appearing in the display device cannot be released during the waterproof performance test.

[0010] Optionally, the positive projection of the bubble release area on the cover plate covers the concave area.

[0011] When the positive projection of the bubble release area on the cover plate covers the concave area, the setting of the concave area can be made more purposeful, ensuring that the adhesive in the high-fluidity area can make full use of the concave area for bubble release.

[0012] Optionally, the cover plate includes a plurality of the recessed areas. When there are multiple recessed areas, the flow requirements of the adhesive with high fluidity at each position of the display device can be met, and the problem of air bubbles accumulating in the display device can be improved.

[0013] Optionally, the adhesive layer is disposed within the recessed area. In this embodiment, when the adhesive layer is disposed within the recessed area, the adhesive in the high-fluidity area can be completely disposed within the recessed area, ensuring that the adhesive in the high-fluidity area can fully utilize the recessed area for air bubble release.

[0014] Optionally, the recessed area is a blind hole, and a plurality of the blind holes are uniformly arranged in the air bubble release area;

[0015] Or,

[0016] the recessed area is a groove, and the groove extends from the center of the adhesive layer to the edge of the adhesive layer.

[0017] The recessed area arranged in this way can provide an increased flow space for the adhesive at each position of the air bubble release area.

[0018] Optionally, the depth of the recessed area ranges from 30 ± 5 μm.

[0019] Through experimental simulation, it is found that when the depth of the recessed area is within the above range, the strength of the cover plate can be ensured, and a better flow space can be provided for the adhesive layer, improving the problem that air bubbles are not easily discharged.

[0020] Optionally, the air bubble release area includes a plurality of strip-shaped areas, and the strip-shaped areas extend from the center of the adhesive layer to the edge of the adhesive layer.

[0021] The strip-shaped areas can provide regular channels for the release of air bubbles, ensuring the smooth release of air bubbles.

[0022] Optionally, the plurality of strip-shaped areas are uniformly distributed in the adhesive layer.

[0023] The uniformly distributed plurality of strip-shaped areas can ensure the smooth release of air bubbles at each position in the adhesive layer.

[0024] Optionally, the curing rate of the adhesive located in the air bubble release area is less than the curing critical value of the adhesive, and the adhesive is completely cured when the curing rate of the adhesive is greater than the curing critical value;

[0025] Optionally, the difference between the curing rate of the adhesive located in the air bubble release area and the curing critical value of the adhesive is less than 5%.

[0026] When the difference between the curing rate of the adhesive in the bubble release area and the curing critical value is within the above range, it can not only ensure that the adhesive in the bubble release area has a certain fluidity to avoid complete curing, but also ensure that the adhesive in the bubble release area has a certain adhesiveness to ensure the adhesion strength between the cover plate and the display panel.

[0027] In a second aspect, an electronic device is provided, including the display device described in any one of the above.

[0028] In a third aspect, a method for manufacturing a display device is provided, including:

[0029] Providing a display panel;

[0030] Forming an adhesive layer on one side of the display panel in the light-emitting direction;

[0031] Providing a cover plate on the side of the adhesive layer facing away from the display panel;

[0032] Performing zoned curing on the adhesive layer so that the curing rate of the adhesive in the bubble release area is less than that of the adhesive in other areas, and the bubble release area extends from the inside of the adhesive layer to the edge of the adhesive layer.

[0033] Optionally, the providing a cover plate on the side of the adhesive layer facing away from the display panel includes:

[0034] Forming at least one recessed area on the side of the cover plate facing the display panel, and the positive projection of the bubble release area on the cover plate covers the recessed area.

[0035] Optionally, the performing zoned curing on the adhesive layer includes:

[0036] Providing a grating on one side of the adhesive layer, and the light-blocking area of the grating coincides with the positive projection of the bubble release area on the cover plate;

[0037] Using the grating as a mask and irradiating the adhesive layer from the side of the grating away from the adhesive layer with ultraviolet light to perform zoned curing on the adhesive layer;

[0038] Or,

[0039] Providing a halftone mask on one side of the adhesive layer, and the low-transmission area of the halftone mask coincides with the positive projection of the bubble release area on the cover plate;

[0040] Using the halftone mask as a mask and irradiating the adhesive layer from the side of the halftone mask away from the adhesive layer with ultraviolet light to perform zoned curing on the adhesive layer.

[0041] As can be seen from the above technical solution, the embodiments of the present application provide a display device, a manufacturing method thereof, and an electronic device. Among them, by providing a bubble release area with a relatively low curing rate in the adhesive layer, the bubbles generated during the waterproof performance test of the display device can diffuse outward through the adhesive located in the bubble release area, reducing the problem that the bubbles generated during the waterproof performance test are not easily dissipated. Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0043] Figure 1 Schematic diagram of bubbles appearing in the display device during the waterproof performance test;

[0044] Figure 2 Schematic cross-sectional structure diagram of the display device;

[0045] Figure 3 Schematic cross-sectional structure diagram of a display device provided by an embodiment of the present application;

[0046] Figure 4 Top view structure diagram of an adhesive layer provided by an embodiment of the present application;

[0047] Figure 5 Another top view structure diagram of an adhesive layer provided by an embodiment of the present application;

[0048] Figure 6 Another schematic cross-sectional structure diagram of a display device provided by an embodiment of the present application;

[0049] Figure 7 Top view structure diagram of a cover plate provided by an embodiment of the present application;

[0050] Figure 8 Schematic structure diagram of an electronic device provided by an embodiment of the present application;

[0051] Figure 9 Schematic flowchart of a manufacturing method of a display device provided by an embodiment of the present application. Detailed Embodiments

[0052] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of this specification shall have the ordinary meanings understood by those of ordinary skill in the art to which this specification pertains. The terms "first", "second" and similar terms used in the embodiments of this specification do not denote any order, quantity or importance, but are only used to avoid confusion of components.

[0053] Unless otherwise required by the context, throughout this specification, "a plurality of" means "at least two", and "comprising" is interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples" or "some examples", etc. are intended to indicate that specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of this specification. The schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0054] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this specification without creative efforts shall fall within the scope of protection of this specification.

[0055] The waterproof performance tests of display devices and electronic devices are divided into different test levels such as 3ATM and 5ATM. Among them, ATM refers to atmospheric pressure, 3ATM refers to 3 atmospheres, the test pressure is 300KPA, and products that pass the waterproof performance test of the 3ATM test level can meet 30-meter waterproofing. 5ATM refers to 5 atmospheres, the test pressure is 500KPA, and products that pass the waterproof performance test of the 5ATM test level can meet 50-meter waterproofing.

[0056] However, during the waterproof performance test, since the product is placed in a high-pressure and high-humidity environment, bubbles such as those shown in Figure 1 are likely to appear in the display device due to extrusion and other reasons. And after the test is completed, these generated bubbles are not easy to disperse. Through long-term analysis of the structure of the display device, the inventor found that as shown in Figure 2 during the waterproof performance test of the display device, most of the bubbles appear in the optically clear adhesive (OCA) 2 between the display panel 1 and the cover plate 3. Since the fluidity of the optically clear adhesive 2 becomes poor after curing, the bubbles cannot be released, resulting in the situation that bubbles remain in the display device after the waterproof performance test.

[0057] To solve this problem, the inventor has provided a bubble release area with a relatively low curing rate in the adhesive layer for bonding the display panel and the cover plate, so that the adhesive located in the bubble release area can maintain good fluidity. This enables the bubbles generated after the waterproof performance test of the display device to be released through the adhesive in the bubble release area, improving the problem that bubbles appear in the display device and cannot be released. At the same time, the adhesive outside the bubble release area in the adhesive layer maintains a relatively high curing rate, ensuring the bonding performance of the adhesive layer.

[0058] In addition, the inventor further found through research that a recessed area can be provided on the side of the cover plate facing the adhesive layer, so that the adhesive with relatively high fluidity can fill into the recessed area to release the bubbles outward, increasing the release space for the bubbles and improving the problem that the bubbles cannot be released.

[0059] Based on the above concept, the display device provided by the embodiments of the present application will be described exemplarily below with reference to the accompanying drawings.

[0060] Embodiments of the present application provide a display device, as Figure 3 and Figure 4 shown, including:

[0061] a display panel 10 and a cover plate 30 located on one side of the display panel 10 in the light-emitting direction;

[0062] an adhesive layer 20 located between the cover plate 30 and the display panel 10, and the adhesive layer 20 includes a bubble release area 21; in the adhesive layer 20, the curing rate of the adhesive located in the bubble release area 21 is less than that of the adhesive located in other areas 22, and the bubble release area 21 extends from the inside of the adhesive layer 20 to the edge of the adhesive layer 20.

[0063] Referring to Figure 4 , Figure 4 shows a top view schematic diagram of the adhesive layer 20. The inside of the adhesive layer 20 may refer to the area closer to the inside compared to the edge area of the adhesive layer 20 in the plane where the adhesive layer 20 is located. The edge of the adhesive layer 20 may refer to the area where the four sides of the adhesive layer 20 are in contact with the outside. The bubble release area 21 arranged in this way can provide a bubble release channel from the inside to the outside after bubbles are generated in the adhesive layer 20. In addition to the rectangular bubble release area 21 as Figure 4 shown, the shape of the bubble release area 21 in the top view may also be an irregular shape as Figure 5 shown. The number of the bubble release areas 21 may be one as Figure 5 shown, or may be multiple as Figure 4 shown. This specification does not make any limitations in this regard.

[0064] A smaller curing rate in the bubble release area 21 means a higher fluidity of the adhesive in the bubble release area 21, providing a release channel for the bubbles generated in the adhesive layer 20 and improving the problem that bubbles are generated and not easily released during the waterproof performance test of the display device. Specifically, during the waterproof performance test of the display device, due to the high-temperature and high-humidity environment, bubbles will be generated inside the display device and overflow into the adhesive layer 20. As the amount of gas in the bubbles increases, the pressure inside the bubbles gradually increases to a level greater than the external pressure. Driven by the force brought by the pressure difference, the bubbles will be transmitted to the outside along the area where the fluid adhesive is located in the adhesive layer 20 and finally released from the edge, achieving the purpose of improving the above phenomenon.

[0065] The adhesive in the adhesive layer 20 can be an optical adhesive or other types of adhesives. As an adhesive, the optical adhesive has characteristics such as high light transmittance (≥90%) and a wide applicable temperature range, and is widely used in the bonding of optical devices. The curing rate of the adhesive can be calculated using: curing rate = (enthalpy value of the original adhesive - enthalpy value after curing) / enthalpy value of the original adhesive × 100%, or the curing rate can be detected using infrared spectroscopy.

[0066] Optionally, the curing rate of the adhesive located in the bubble release area 21 is less than the curing critical value of the adhesive. When the curing rate of the adhesive is greater than the curing critical value, it is completely cured. Specifically, the difference between the curing rate of the adhesive located in the bubble release area 21 and the curing critical value of the adhesive is less than 5%. Taking the optical adhesive as an example, when the type of adhesive used in the adhesive layer 20 is 3M's 2806 optical adhesive or Mitsubishi's G6.2 optical adhesive, the curing critical value of these adhesives can be 70%. That is, when the curing rate of the adhesive is greater than 70%, the adhesive is completely cured. Therefore, the curing rate of the adhesive located in the bubble release area 21 should be less than 70% to ensure that this part of the adhesive has a certain fluidity. Optionally, the curing rate of the adhesive located in the bubble release area 21 can be less than 70% by within 5%, that is, 65% ≤ G < 70%. In this way, it can not only ensure that the adhesive located in the bubble release area 21 has a certain fluidity and avoids complete curing, but also ensure that the adhesive located in the bubble release area 21 has a certain adhesiveness and ensures the bonding strength between the cover plate 30 and the display panel 10. When the type of adhesive used in the adhesive layer 20 is 3M's 7106 optical adhesive, the curing critical value of this type of optical adhesive can be 82%. That is, when the curing rate of the adhesive is greater than 82%, it can be considered that the adhesive is completely cured. Therefore, the curing rate of the adhesive located in the bubble release area 21 should be less than 82% to ensure that this part of the adhesive has a certain fluidity. Optionally, the curing rate of the adhesive located in the bubble release area 21 can be less than 82% by within 5%, that is, 77% ≤ G < 82%.

[0067] In some embodiments, in order to increase the release space of air bubbles and improve the problem that air bubbles cannot be released, referring to Figure 6 , one side of the cover plate 30 facing the adhesive layer 20 includes at least one recessed area 31. By providing at least one recessed area on the side of the cover plate facing the adhesive layer, this recessed area expands the flow space of the adhesive with a lower curing rate and higher fluidity, increases the release space of air bubbles, and improves the problem that air bubbles cannot be released in the display device during the waterproof performance test.

[0068] In some embodiments, optionally, the adhesive layer 20 is disposed within the recessed area 31. In this embodiment, when the adhesive layer 20 is disposed within the recessed area 31, the adhesive in the high-fluidity area can be completely disposed within the recessed area 31, ensuring that the adhesive in the high-fluidity area can make full use of the recessed area 31 for air bubble release.

[0069] In another embodiment, the orthographic projection of the air bubble release area 21 on the cover plate 30 covers the recessed area 31.

[0070] In this embodiment, since the recessed areas 31 are provided on one side of the cover plate 30 facing the adhesive layer 20, these recessed areas 31 enhance the flow space of the adhesive with higher fluidity, increase the release space of air bubbles, and improve the problem that air bubbles cannot be released in the display device during the waterproof performance test.

[0071] In order to provide more flow space for the adhesive layer 20, still referring to Figure 6 , the number of recessed areas 31 included in the cover plate 30 can be multiple. When there are multiple recessed areas 31, the flow requirements of the adhesive with higher fluidity at various positions of the display device can be met, and the problem of air bubble accumulation in the display device can be improved.

[0072] Optionally, the adhesive layer 20 is disposed within the recessed area 31. In this embodiment, when the adhesive layer 20 is disposed within the recessed area 31, the adhesive in the high-fluidity area can be completely disposed within the recessed area 31, ensuring that the adhesive in the high-fluidity area can make full use of the recessed area 31 for air bubble release.

[0073] Optionally, for the specific shape of the recessed area 31, still referring to Figure 6 , the recessed area 31 can be a blind hole, and multiple such blind holes are uniformly arranged in the air bubble release area 21. The recessed area 31 arranged in this way can provide an increased flow space for the adhesive at various positions of the air bubble release area 21.

[0074] In other embodiments, referring to Figure 7 , Figure 7It is a schematic top view structure diagram of the cover plate 30. The concave area 31 is a groove, and the groove extends from the center of the adhesive layer 20 to the edge of the adhesive layer 20.

[0075] When the concave area 31 is in the form of a groove, the number of concave areas 31 required in the cover plate 30 can be reduced. Figure 7 The groove in [reference] extends from the center of the adhesive layer 20 to the two side edges of the adhesive layer 20. In some embodiments, the groove can also extend from the center of the adhesive layer 20 to one side edge of the adhesive layer 20. The groove can also extend from the center of the adhesive layer 20 to the edges of the four sides of the adhesive layer 20. Even the groove can be a "rice" - shaped groove. The present specification does not limit the top - view shape of the groove, as long as it can provide a bubble evacuation channel from the inside to the outside of the adhesive layer.

[0076] Optionally, the depth of the concave area 31 ranges from 30 ± 5 μm. For example, in one embodiment of the present specification, the depth of the concave area 31 can be 25 μm, 30 μm, or 35 μm. Through experimental simulation, it is found that when the depth of the concave area 31 is within the above range, it can not only ensure the strength of the cover plate 30 but also provide a better flow space for the adhesive layer 20, improving the problem that bubbles are not easily discharged.

[0077] Optionally, referring to Figure 4 , the bubble release area 21 includes a plurality of strip - shaped areas, and the strip - shaped areas extend from the center of the adhesive layer 20 to the edge of the adhesive layer 20.

[0078] Specifically, the strip - shaped areas can provide regular channels for the release of bubbles, ensuring the smooth release of bubbles.

[0079] In other embodiments, the plurality of strip - shaped areas are evenly distributed in the adhesive layer 20.

[0080] The evenly distributed plurality of strip - shaped areas can ensure the smooth release of bubbles at each position in the adhesive layer.

[0081] Correspondingly, as Figure 8 shown, the embodiment of the present specification also provides an electronic device 100, including: a display device as described in any of the above embodiments.

[0082] The embodiment of the present specification also provides a manufacturing method for manufacturing the above - mentioned display device. As Figure 9 shown, it includes:

[0083] S101: Provide a display panel;

[0084] S102: Form an adhesive layer on one side of the display panel in the light-emitting direction;

[0085] S103: Set a cover plate on the side of the adhesive layer facing away from the display panel;

[0086] S104: Cure the adhesive layer in zones, so that the curing rate of the adhesive in the bubble release area is less than that of the adhesive in other areas, and the bubble release area extends from the inside of the adhesive layer to the edge of the adhesive layer.

[0087] For the structure of the obtained display device, reference can be made to the relevant descriptions in the foregoing text, and details are not repeated herein.

[0088] Optionally, in order to increase the bubble release space and improve the problem that bubbles cannot be released, step S103: Setting a cover plate on the side of the adhesive layer facing away from the display panel includes:

[0089] Form at least one concave area on the side of the cover plate facing the display panel, and the positive projection of the bubble release area on the cover plate covers the concave area.

[0090] Optionally, forming at least one concave area on the side of the cover plate facing the display panel includes:

[0091] Form a plurality of concave areas on the side of the cover plate facing the display panel, the concave areas are blind holes, and the plurality of blind holes are uniformly arranged in the bubble release area;

[0092] Or,

[0093] The concave area is a groove, and the groove extends from the center of the adhesive layer to the edge of the adhesive layer.

[0094] For the relevant limitations of the cover plate, reference can be made to the relevant descriptions in the foregoing text, and details are not repeated herein.

[0095] Regarding the method of curing the adhesive layer in zones, optionally, curing the adhesive layer in zones includes:

[0096] Set a grating on one side of the adhesive layer, and the light-blocking area of the grating coincides with the positive projection of the bubble release area on the cover plate;

[0097] Using the grating as a mask, irradiate the adhesive layer from the side of the grating away from the adhesive layer with ultraviolet light to cure the adhesive layer in zones.

[0098] Optionally, curing the adhesive layer in zones can also be performed in the following manner:

[0099] A halftone mask is provided on one side of the adhesive layer, and the low light-transmitting area of the halftone mask coincides with the orthographic projection of the bubble release area on the cover plate.

[0100] Using the halftone mask as a mask, irradiate the adhesive layer from the side of the halftone mask away from the adhesive layer with ultraviolet light to perform zonal curing on the adhesive layer.

[0101] In summary, the embodiments of the present application provide a display device, a manufacturing method thereof, and an electronic device. Among them, by providing a bubble release area with a relatively low curing rate in the adhesive layer, the bubbles generated during the waterproof performance test of the display device can diffuse outward through the adhesive in the bubble release area, reducing the problem that the bubbles generated during the waterproof performance test are not easily dissipated.

[0102] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0103] The above embodiments only represent several implementation manners of this specification. The description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the solution provided by the embodiments of this specification. It should be noted that for those of ordinary skill in the art, without departing from the concept of this specification, several modifications and improvements can still be made, and these all belong to the protection scope of this specification. Therefore, the protection scope of the patent of this specification should be subject to the appended claims.

Claims

1. A display device, characterized in that, Comprising: A display panel and a cover plate located on one side of the light-emitting direction of the display panel; An adhesive layer located between the cover plate and the display panel, and the adhesive layer includes a bubble release area; In the adhesive layer, the curing rate of the adhesive in the bubble release area is less than the curing rate of the adhesive in other areas, and the bubble release area extends from the inside of the adhesive layer to the edge of the adhesive layer.

2. The display device according to claim 1, wherein One side of the cover plate facing the adhesive layer includes at least one concave area.

3. The display device according to claim 2, wherein The positive projection of the bubble release area on the cover plate covers the concave area.

4. The display device according to claim 2, characterized in that, The cover plate includes a plurality of the concave areas.

5. The display device according to claim 4, wherein The adhesive layer is disposed in the concave area.

6. The display device according to claim 4, wherein The concave area is a blind hole, and a plurality of the blind holes are uniformly arranged in the bubble release area; Or, The concave area is a groove, and the groove extends from the center of the adhesive layer to the edge of the adhesive layer.

7. The display device according to claim 4, characterized in that, The depth of the concave area ranges from 30±5μm.

8. The display device according to any one of claims 1 to 7, characterized in that, The bubble release area includes a plurality of strip-shaped areas, and the strip-shaped areas extend from the center of the adhesive layer to the edge of the adhesive layer.

9. The display device according to claim 8, wherein The plurality of strip-shaped areas are uniformly distributed in the adhesive layer.

10. The display device according to any one of claims 1 to 7, characterized in that, The curing rate of the adhesive in the bubble release area is less than the curing critical value of the adhesive, and the adhesive is completely cured when the curing rate of the adhesive is greater than the curing critical value.

11. The display device according to claim 10, wherein The difference between the curing rate of the adhesive in the bubble release area and the curing critical value of the adhesive is less than 5%.

12. An electronic device, characterized in that, Comprising: The display device according to any one of claims 1 to 11.

13. A method for preparing a display device, characterized in that, Comprising: Providing a display panel; Forming an adhesive layer on one side of the light-emitting direction of the display panel; Providing a cover plate on one side of the adhesive layer facing away from the display panel; Performing partitioned curing on the adhesive layer so that the curing rate of the adhesive in the bubble release area is less than the curing rate of the adhesive in other areas, and the bubble release area extends from the inside of the adhesive layer to the edge of the adhesive layer.

14. The method according to claim 13, wherein The providing a cover plate on one side of the adhesive layer facing away from the display panel includes: Forming at least one concave area on one side of the cover plate facing the display panel, and the positive projection of the bubble release area on the cover plate covers the concave area.

15. The method according to claim 13, wherein The performing partitioned curing on the adhesive layer includes: Providing a grating on one side of the adhesive layer, and the light-blocking area of the grating coincides with the positive projection of the bubble release area on the cover plate; Using the grating as a mask and irradiating the adhesive layer with ultraviolet light from the side of the grating away from the adhesive layer to perform partitioned curing on the adhesive layer; Or, Providing a halftone mask on one side of the adhesive layer, and the low-transmission area of the halftone mask coincides with the positive projection of the bubble release area on the cover plate; Using the halftone mask as a mask and irradiating the adhesive layer with ultraviolet light from the side of the halftone mask away from the adhesive layer to perform partitioned curing on the adhesive layer.

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