A method of manufacturing a display screen

Abstract

The application relates to a display screen manufacturing method, which comprises the following steps: providing a bonding film; the bonding film comprises a first bonding area in the middle and a second bonding area in the periphery of the first bonding area; the second bonding area of the bonding film is pre-solidified; the pre-solidified bonding film is attached to the inner surface of a cover plate; the cover plate comprises a cover plate light transmission area in the middle and a black vision area in the periphery of the cover plate light transmission area, the first bonding area is attached to the cover plate light transmission area, and the second bonding area is attached to the black vision area; the bonding film is solidified by using light; the light source is located on the side of the outer surface of the cover plate. The second bonding area of the bonding film is pre-solidified, so that when the bonding film is solidified by using light in the subsequent process, the second bonding area is prevented from being insufficiently solidified due to the shielding of the black vision area of the cover plate, the solidification rate of the whole bonding film is kept consistent, and the stability of the bonding film is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a manufacturing method of display screen. BACKGROUND

[0002] At present, display screens (such as display screens of mobile phones) mostly adopt full bonding technology, and the cover plate and the display module are bonded together through optical glue. After bonding, the optical glue can be more stably bonded between the cover plate and the display module by curing the optical glue. The curing of the optical glue is affected by many factors such as light intensity and cover plate light transmission, and the curing result is not ideal. SUMMARY

[0003] The present application provides a manufacturing method of display screen, which comprises:

[0004] providing a bonding film; the bonding film comprises a first bonding area in the middle and a second bonding area in the periphery of the first bonding area;

[0005] pre-curing the second bonding area of the bonding film;

[0006] attaching the pre-cured bonding film to the inner surface of the cover plate; wherein the cover plate comprises a cover plate light transmission area in the middle and a black vision area in the periphery of the cover plate light transmission area, the first bonding area is attached to the cover plate light transmission area, and the second bonding area is attached to the black vision area;

[0007] curing the bonding film by light; wherein the light source is located on the side where the outer surface of the cover plate is located.

[0008] In some embodiments, the second bonding area of the bonding film is pre-cured by light.

[0009] In some embodiments, the bonding film is pre-cured by ultraviolet light with a wavelength of 340 nm or 360 nm, and the pre-curing time is 4 s to 6 s.

[0010] In some embodiments, the curing rate of the pre-curing of the second bonding area of the bonding film is 15% to 20%.

[0011] In some embodiments, the material of the bonding film is OCA bonding glue.

[0012] In some embodiments, the pre-curing of the second bonding area of the bonding film comprises:

[0013] providing a curing shielding piece; the middle part of the curing shielding piece comprises a light shielding area and a curing light transmission area in the periphery of the light shielding area;

[0014] The adhesive film is correspondingly pasted with the curing shielding sheet; wherein the light shielding area corresponds to the first adhesive area;

[0015] The adhesive film pasted on the curing shielding sheet is pre-cured by light; wherein the light source is located on the side of the curing shielding sheet away from the adhesive film.

[0016] In an embodiment, the curing light transmission area includes a first light transmission part located at the periphery of the light shielding area and a second light transmission part located at the periphery of the first light transmission part; wherein the first light transmission part is consistent in size with the second adhesive area, and the second light transmission part is provided with a first alignment mark; the adhesive film has a protective film outside its two opposite surfaces, the protective film includes a pasting part attached to the surface of the adhesive film and an extension part located at the periphery of the pasting part, and the extension part is provided with a second alignment mark corresponding to the first alignment mark;

[0017] Before the adhesive film is correspondingly pasted with the curing shielding sheet, the method includes:

[0018] The first alignment mark is aligned with the second alignment mark.

[0019] In some embodiments, before the adhesive film is correspondingly pasted with the curing shielding sheet, the method includes:

[0020] A release adhesive is pasted at the first alignment mark; the release adhesive includes an adhesive part and a handle, the adhesive part is pasted on the first alignment mark, and the handle extends out of the curing shielding sheet.

[0021] In some embodiments, the pre-curing of the second adhesive area of the adhesive film includes:

[0022] A curing shielding sheet is provided; the middle part of the curing shielding sheet includes a light shielding area and a curing light transmission area located at the periphery of the light shielding area;

[0023] The curing shielding sheet is pasted on a first light transmission sheet, and the adhesive film is placed on a carrier; wherein the adhesive film is located between the first light transmission sheet and the carrier, and the light shielding area corresponds to the first adhesive area;

[0024] The adhesive film is pre-cured by light; wherein the light source is located on the side of the curing shielding sheet away from the adhesive film.

[0025] In some embodiments, the provision of the curing shielding sheet includes:

[0026] A second light transmission sheet is provided;

[0027] The second light-transmitting sheet is printed with ink in the middle part to form a cured shielding sheet with a light-shielding area in the middle part.

[0028] In some embodiments, the size of the light-shielding area is less than or equal to the size of the first bonding area.

[0029] In some embodiments, after the pre-cured bonding sheet is attached to the inner surface of the cover plate, before the bonding sheet is cured by light irradiation, the method comprises:

[0030] The cover plate with the attached bonding sheet is arranged on the side of the polarizing sheet away from the display panel, and the bonding sheet is located between the cover plate and the polarizing sheet.

[0031] The curing of the bonding sheet by light irradiation comprises:

[0032] The curing of the bonding sheet by light irradiation comprises:

[0033] The above-mentioned manufacturing method of the display screen provided by the present application, before the bonding sheet is attached to the cover plate, the second bonding area of the bonding sheet is pre-cured, so that when the bonding sheet is cured by light irradiation later, the problem of insufficient curing of the second bonding area caused by the blocking of the black vision area of the cover plate is avoided, and the stability of the bonding sheet is improved. Compared with the embodiment of increasing the light intensity, the damage to other modules caused by the excessive temperature in the light irradiation furnace due to the increase of the light intensity is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed in the embodiment or related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0035] Figure 1 is a method flow chart of a manufacturing method of a display screen according to an exemplary embodiment;

[0036] Figure 2 is a top view of a cured shielding sheet according to an exemplary embodiment;

[0037] Figure 3 is a schematic diagram of pre-curing a bonding sheet according to an exemplary embodiment;

[0038] Figure 4is a top view of a cured barrier sheet bonded with a fixing adhesive according to an exemplary embodiment;

[0039] Figure 5 is Figure 4 is a side view of a cured barrier sheet bonded with a fixing adhesive;

[0040] Figure 6 is a schematic view of another pre-cured adhesive sheet according to an exemplary embodiment;

[0041] Figure 7 is a side view of a cover sheet adhered to an adhesive sheet according to an exemplary embodiment. DETAILED DESCRIPTION

[0042] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals refer to like elements, unless the context clearly shows otherwise. The following description of exemplary embodiments is not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.

[0043] The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used in the present disclosure and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0044] It will be understood that, although the terms first, second, third, etc. can be used herein to describe various information, these terms are not intended to denote a temporal or chronological order. Rather, these terms are used only to distinguish one type of information from another.

[0045] Figure 1 is a method flow chart of a manufacturing method of a display screen according to an exemplary embodiment. Please refer to Figure 1 The present application provides a manufacturing method of a display screen, which comprises the following steps 101-107:

[0046] Step 101: providing an adhesive sheet; the adhesive sheet comprises a first adhesive area in the middle and a second adhesive area in the periphery of the first adhesive area.

[0047] Step 103: pre-curing the second adhesive area of the adhesive sheet.

[0048] Step 105: paste the pre-cured adhesive sheet on the inner surface of the cover plate; wherein the cover plate comprises a cover plate light transmission area in the middle and a black vision area in the periphery of the cover plate light transmission area, the first adhesive area is pasted on the cover plate light transmission area, and the second adhesive area is pasted on the black vision area.

[0049] Step 107: curing the adhesive sheet by light irradiation; wherein the light source is located on the side of the outer surface of the cover plate.

[0050] In combination with Figures 2 to 7 As shown in the drawings, the manufacturing method of the display screen is described.

[0051] In step 101, an adhesive sheet 10 is provided.

[0052] In some embodiments, the adhesive sheet 10 can be provided first, and then cut to form the adhesive sheet 10. The adhesive sheet 10 comprises a first adhesive area 11 and a second adhesive area 12.

[0053] Specifically, the size of the provided adhesive sheet may not be consistent with the size of the required adhesive sheet, and the adhesive sheet can be cut according to the size of the required adhesive sheet to form the required adhesive sheet.

[0054] In some embodiments, the material of the adhesive sheet 10 is OCA adhesive.

[0055] In step 103, the second adhesive area 12 of the adhesive sheet 10 is pre-cured by light irradiation to form a pre-cured adhesive sheet 10'.

[0056] Taking the material of the adhesive sheet 10 as OCA adhesive for example, the OCA adhesive has a UV photoinitiator, and the initiator works under the irradiation of corresponding UV light, so that the OCA adhesive material becomes a stable polymer structure.

[0057] Compared with the embodiment of increasing the light intensity, this scheme avoids the damage of other modules caused by the excessive temperature in the light irradiation furnace due to the increase of the light intensity.

[0058] In combination with Figure 2 and Figure 3 As shown in the drawings, in some embodiments, step 103 can be implemented by steps 1031 to 1033 as follows:

[0059] Step 1031: provide a curing shielding sheet 30. The middle part of the curing shielding sheet 30 comprises a light shielding area 31 and a curing light transmission area 32 located in the periphery of the light shielding area 31.

[0060] In some embodiments, the curing light-transmitting area 32 is provided with a first alignment mark 33 for alignment of the curing light-blocking sheet 30.

[0061] Specifically, the curing light-transmitting area 32 includes a first light-transmitting part 321 located at the periphery of the light-blocking area 31 and a second light-transmitting part 322 located at the periphery of the first light-transmitting part 321. The first light-transmitting part 321 is consistent in size with the second bonding area 12. The first alignment mark 33 can be specifically provided in the area of the second light-transmitting part 322 to avoid affecting the pre-curing effect when pre-curing the second bonding area 12.

[0062] The number of the first alignment marks 33 is multiple (two or more). For example, it can be four as shown in the figure. Figure 2 The specific positions of the four first alignment marks 33 can be set at the four corners of the second light-transmitting part 322 close to the curing light-blocking sheet 30, inside the corners. Of course, in other embodiments, other multiple first alignment marks can also be provided. The positions of the first alignment marks can also be set at other positions. The number and setting positions of the first alignment marks can be set according to specific conditions.

[0063] Step 1032: The curing light-blocking sheet 30 is attached to the first light-transmitting sheet 40 and the bonding adhesive sheet 10 is provided on the loading platform 50; the bonding adhesive sheet 10 is located between the first light-transmitting sheet 40 and the loading platform 50, and the light-blocking area 31 corresponds to the first bonding area 11.

[0064] In some embodiments, the curing light-blocking sheet 30 is consistent in shape with the bonding adhesive sheet 10, and the overall size of the curing light-blocking sheet 30 is slightly larger than that of the bonding adhesive sheet 10.

[0065] Based on the above description of the curing light-blocking sheet 30, the first alignment mark 33 is located at the second light-transmitting part 322, and when the bonding adhesive sheet 10 and the curing light-blocking sheet 30 are correspondingly provided, the first alignment mark 33 is located outside the orthographic projection of the bonding adhesive sheet 10, so as to avoid the influence of the first alignment mark 33 on the pre-curing light of the second bonding area and ensure the pre-curing effect of the second bonding area.

[0066] It should be noted that the size of the light-blocking area 31 is consistent with the size of the first bonding area 11. Specifically, the size of the light-blocking area 31 consistent with the size of the first bonding area 11 can be understood as the size of the light-blocking area 31 being equal to or slightly smaller than the size of the first bonding area 11. Preferably, the size of the light-blocking area 31 is slightly smaller than the size of the first bonding area 11, which can make the pre-curing more sufficient. For example, in some embodiments, the overall width and / or length of the light-blocking area 31 can be about 0.1 mm smaller than that of the first bonding area 11. Accordingly, the light-blocking area 31 is within the orthographic projection of the first bonding area 11, and the distance between the edge of the light-blocking area 31 and the edge of the first bonding area 11 is about 0.05 mm.

[0067] The first light-transmitting sheet 40 mentioned here can be a transparent sheet structure made of glass or other materials.

[0068] Step 1033: Pre-cur the adhesive film 10 by means of light; wherein, the light source 60 is located on the side of the curing shield 30 away from the adhesive film 10.

[0069] like Figure 3 As shown, in some embodiments, an exposure machine can be used to pre-cur the adhesive film 10. The light source 60 of the exposure machine is located on the side of the curing shield 30 away from the adhesive film 10. The exposure machine also includes a light-shielding cover so that the pre-curing of the adhesive film 10 is carried out in a sealed light-shielding space to prevent light from shining out and causing adverse effects on operators or other peripheral equipment.

[0070] Please refer to Figure 2 , Figures 4 to 6 As shown, in some other embodiments, step 103 can be implemented by the following steps 1034 to 1036:

[0071] Step 1034: Provide a curing masking sheet 30. Details of the curing masking sheet 30 can be found in the above description.

[0072] Step 1035: Adhesive film 10 and curing masking film 30 are attached together, wherein the light-blocking area 31 of curing masking film 30 corresponds to the first bonding area 11 of adhesive film 10.

[0073] In some embodiments, a release adhesive (such as a weakly tack pressure-sensitive adhesive) can be used, and the adhesive can be aligned and pasted with reference to the first alignment mark 33 on the cured masking sheet 30. The use of this release adhesive facilitates subsequent removal of the adhesive.

[0074] In some embodiments, before attaching the adhesive film and the cured masking sheet together, the method includes the following steps:

[0075] A release adhesive is applied to the first alignment mark. The release adhesive includes an adhesive portion and a handle; the adhesive portion is adhered to the first alignment mark, and the handle extends beyond the cured shielding sheet.

[0076] Please refer to the details. Figure 4 As shown, release adhesive 70 is affixed at the first alignment mark 33. The release adhesive 70 includes an adhesive portion 71 and a handle 72. Optionally, the adhesive portion 71 of the release adhesive 70 can be a weakly tacky pressure-sensitive adhesive. The handle 72 facilitates the removal of the adhesive portion 71.

[0077] Please combine Figure 5The handle 72 has two layers of adhesive 71 on opposite sides, one layer being attached to the cured masking sheet 30 and the other layer being attached to the adhesive film 10. The adhesive 71 attached to the cured masking sheet 30 is attached to the first alignment mark 33, and the handle 72 extends beyond the cured masking sheet 30. In some embodiments, the release force of the handle 72 is greater than the release force of the cured masking sheet 30 to ensure that when the release adhesive 70 is removed, the adhesive 71 can be torn off along with the handle 72 without sticking to the cured masking sheet 30.

[0078] Typically, the adhesive film 10 has a protective film on both opposite surfaces, and the protective film also has a second alignment mark corresponding to the first alignment mark. The size of the protective film is larger than the size of the adhesive film 10, that is, the protective film includes an adhesive portion attached to the surface of the adhesive film 10 and an extension portion located around the adhesive portion, and the second alignment mark on the protective film is specifically located on the extension portion. For example, it can also be located on the inner side of the four corners of the protective film.

[0079] Specifically, before attaching the adhesive film 10 and the curing masking sheet 30 together, the method includes the following steps: aligning the first alignment mark with the second alignment mark. That is, first aligning the respective alignment marks, then aligning the first alignment mark with the second alignment mark, and finally fixing the adhesive film 10 and the curing masking sheet 30 together using release adhesive. Correspondingly, the adhesive portion 71 attached to the adhesive film 10 is attached to the second alignment mark.

[0080] Step 1036: Pre-curing the adhesive film 10 attached to the curing masking sheet 30 by means of light; wherein, the light source is located on the side of the curing masking sheet away from the adhesive film.

[0081] like Figure 6 As shown, in some embodiments, a curing oven can be used to pre-cur the adhesive film 10. The light source 60' of the curing oven is located on the side of the curing shield 30 away from the adhesive film 10. The curing oven also includes a light shield 80 so that the pre-curing of the adhesive film 10 is carried out in a sealed, light-shielded space, preventing light from escaping and adversely affecting operators or other peripheral equipment. In addition, the curing oven also has a conveying device, which includes a conveyor belt 90. The curing shield 30 and the adhesive film 10, which are bonded together, can be conveyed into the curing oven via the conveyor belt 90, and after pre-curing, they can be conveyed out of the curing oven via the conveyor belt 90. The curing oven referred to here can be an ultraviolet curing oven.

[0082] Specifically, after step 1035, the fixed-together adhesive sheet 10 and the curing shield 30 are placed on the conveying belt 90, the adhesive sheet 10 is arranged close to one side of the conveying belt 90, the curing shield 30 is arranged away from the other side of the conveying belt 90, and the adhesive sheet 10 is conveyed to a preset position in the light curing oven through the conveying belt 90, then the light source 60' is turned on to pre-cure the adhesive sheet 10. After a preset pre-curing time, the light source 60' is turned off, the pre-cured adhesive sheet and the curing shield 30 are conveyed out of the light curing oven through the conveying belt 90, then the release adhesive 70 is pulled out from between the adhesive sheet 10 and the curing shield 30 through the handle 72, so that the adhesive sheet 10 and the curing shield 30 are separated, and the required pre-cured adhesive sheet 10' is obtained.

[0083] Further, in some embodiments, the above-mentioned step 1031 or step 1034 can be implemented by the following steps 10310 and 10311:

[0084] Step 10310: providing a second light-transmitting sheet;

[0085] Step 10311: printing ink on the middle part of the second light-transmitting sheet to form a curing shield with a light-shielding area in the middle part.

[0086] The second light-transmitting sheet mentioned herein can be a transparent glass, plastic sheet or other transparent sheet structure.

[0087] Specifically, when forming the light-shielding area, the ink can be printed according to a preset (or required) size to form a required curing shield 30.

[0088] In some embodiments, the adhesive sheet 10 can be pre-cured by ultraviolet light with a wavelength of 340 nm or 360 nm, and the pre-curing time is 4 s to 6 s.

[0089] In some embodiments, the curing rate of the second adhesive area 12 of the adhesive sheet 10 after pre-curing is 15% to 20%, so that after the entire adhesive sheet 10 is cured in the subsequent full-lamination stage, the curing rate of the entire adhesive sheet 10 can reach more than 70%, and the curing rates of the first adhesive area 11 and the second adhesive area 12 are relatively consistent, the curing effect is good, and the bonding effect of the entire adhesive sheet 10 is improved.

[0090] In step 105, please refer to Figure 7 In some embodiments, the pre-cured adhesive sheet 10' is attached to the inner surface of the cover plate 20. The cover plate 20 includes a cover plate light-transmitting area 21 in the middle and a black vision area 22 around the cover plate light-transmitting area 21. The first adhesive area 11 of the adhesive sheet 10' corresponds to the cover plate light-transmitting area 21, and the second adhesive area 12' corresponds to the black vision area 22.

[0091] Specifically, such as Figure 7 As shown, when the adhesive film 10' is applied to the cover plate 20, the second adhesive area 12' of the adhesive film 10' is located within the orthographic projection range of the blackened area 22. Optionally, in some embodiments, the width of the second adhesive area 12' ranges from 0.5mm to 1mm.

[0092] The light-transmitting area 21 of the cover plate can be understood as a portion corresponding to the display area of ​​the screen, and the blackened area 22 is a low-transmittance area located on the periphery of the display area. In some embodiments, the blackened area may be an ink area formed by printing ink, or a low-transmittance area formed by other means.

[0093] Typically, a display screen may include a display panel, a polarizer located outside the display panel, and a cover plate located outside the polarizer. The polarizer can be bonded and fixed to the cover plate by an adhesive film 10.

[0094] Accordingly, in some embodiments, after step 105 and before step 107, the method includes the following step 106:

[0095] Step 106: Place the cover plate with the adhesive film 10 on the side of the polarizer away from the display panel; wherein, the adhesive film 10 is located between the cover plate and the polarizer, and is used to bond the cover plate and the polarizer.

[0096] The polarizer can be pre-attached to the display panel.

[0097] Accordingly, in step 107, the adhesive film located between the cover plate 20 and the polarizer can be cured by light.

[0098] Specifically, the lighting equipment used can be the same as that used in the pre-curing stage, such as a light oven or exposure machine. In practice, the stacked display panel, polarizer, adhesive film 10, and cover plate are placed in a light oven or exposure machine for light curing. During this curing process, a portion of the light from the light source can pass through the light-transmitting area 21 of the cover plate 20 to the corresponding first bonding area 11, thus curing the first bonding area 11. Because some light can pass through the low-transmittance blackened area and the refracted light from the first bonding area 11, the second bonding area 12 is also cured, thereby increasing the curing rate of the second bonding area 12 to over 70%.

[0099] For example, in some embodiments, ultraviolet light with a wavelength of 340nm or 360nm can be used to pre-cur the adhesive film 10, and the pre-curing time is 20s to 40s. After curing, the curing rate of the first adhesive area 11 and the second adhesive area 12 can both reach more than 70%.

[0100] In addition, the present application also provides a display screen. The display screen can be manufactured by the manufacturing method of the display screen.

[0101] The display screen can include a display panel, a polarizer located outside the display panel, an adhesive sheet 10 located on the side of the polarizer away from the display panel, and a cover plate 20 located on the side of the adhesive sheet 10 away from the polarizer.

[0102] In addition, the present application also provides a terminal device. The terminal device can include the display screen described above. The terminal device can be a mobile phone, a wearable device (such as a wearable watch, etc.), a personal computer, or any other terminal device having a display screen.

[0103] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0104] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A method of manufacturing a display panel, characterized by, The manufacturing method comprises: providing a bonding sheet; the bonding sheet comprises a first bonding area in the middle and a second bonding area in the periphery of the first bonding area; pre-curing the second bonding area of the bonding sheet; attaching the pre-cured bonding sheet to the inner surface of the cover plate; wherein the cover plate comprises a cover plate light transmission area in the middle and a black vision area in the periphery of the cover plate light transmission area, the first bonding area is attached to the cover plate light transmission area, and the second bonding area is attached to the black vision area; curing the bonding sheet by light; wherein the light source for curing is located on the side where the outer surface of the cover plate is located; pre-curing the second bonding area of the bonding sheet by light; the pre-curing of the second bonding area of the bonding sheet comprises: providing a curing shielding sheet; the middle of the curing shielding sheet comprises a light shielding area and a curing light transmission area in the periphery of the light shielding area; attaching the bonding sheet and the curing shielding sheet together; wherein the light shielding area corresponds to the first bonding area; pre-curing the bonding sheet attached to the curing shielding sheet by light; wherein the light source for pre-curing is located on the side of the curing shielding sheet away from the bonding sheet; the size of the light shielding area is consistent with the size of the first bonding area.

2. The method of manufacturing a display panel according to claim 1, wherein The bonding sheet is pre-cured by ultraviolet light with a wavelength of 340 nm or 360 nm, and the pre-curing time is 4 s to 6 s.

3. The method of manufacturing a display panel according to claim 1, wherein The curing rate of the pre-curing of the second bonding area of the bonding sheet is 15% to 20%.

4. The method of manufacturing a display panel according to claim 1, wherein The material of the bonding sheet is OCA bonding glue.

5. The method of manufacturing a display panel according to claim 1, wherein The curing light transmission area comprises a first light transmission part in the periphery of the light shielding area and a second light transmission part in the periphery of the first light transmission part; wherein the first light transmission part is consistent in size with the second bonding area, the second light transmission part is provided with a first alignment mark; the bonding sheet has a protective film outside the opposite two surfaces, the protective film comprises a bonding part attached to the surface of the bonding sheet and an extension part in the periphery of the bonding part, and the extension part is provided with a second alignment mark corresponding to the first alignment mark; Before the bonding sheet and the curing shielding sheet are attached together, the method comprises: aligning the first alignment mark with the second alignment mark.

6. The method of manufacturing a display panel according to claim 5, wherein Before the bonding sheet and the curing shielding sheet are attached together, the method comprises: attaching a release bonding glue at the first alignment mark; the release bonding glue comprises a bonding part and a handle, the bonding part is attached to the first alignment mark, and the handle extends out of the curing shielding sheet.

7. The method of manufacturing a display panel according to claim 1, wherein the pre-curing of the second bonding area of the bonding sheet comprises: providing a curing shielding sheet; the middle of the curing shielding sheet comprises a light shielding area and a curing light transmission area in the periphery of the light shielding area; attaching the curing shielding sheet to the first light transmission sheet and placing the bonding sheet on the loading platform; wherein the bonding sheet is located between the first light transmission sheet and the loading platform, and the light shielding area corresponds to the first bonding area; The pre-curing of the adhesive film is performed by means of light irradiation, wherein the light source is located on the side of the curing shielding sheet away from the adhesive film.

8. The method of manufacturing a display panel according to any one of claims 1 to 7, wherein The curing shielding sheet is provided by: providing a second light-transmitting sheet; printing ink on the middle part of the second light-transmitting sheet to form a curing shielding sheet with a light-shielding area in the middle part.

9. The method of manufacturing a display panel according to claim 1, wherein After the pre-cured adhesive film is attached to the inner surface of the cover plate, the method further comprises: placing the cover plate with the adhesive film attached thereon on the side of the polarizing sheet away from the display panel, wherein the adhesive film is located between the cover plate and the polarizing sheet; the curing of the adhesive film is performed by means of light irradiation, which comprises: curing the adhesive film located between the cover plate and the polarizing sheet by means of light irradiation.

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