Supporting film and manufacturing method thereof, display module and manufacturing method thereof

Abstract

The application discloses a supporting film and a manufacturing method thereof, a display module and a manufacturing method thereof. The supporting film comprises a supporting film body and a first light shielding part. The supporting film body comprises a first surface and a second surface arranged oppositely along a first direction. The supporting film body is provided with an opening hole penetrating through the supporting film body along the first direction. The first direction is parallel to the thickness direction of the supporting film body. The opening hole comprises a first side wall connected with the first surface and the second surface. The first light shielding part is arranged on the supporting film body and exposes at least part of the opening hole. The first light shielding part is overlapped with the first side wall in the orthographic projection of the first surface. The supporting film provided by the application has higher fitting precision with the display panel.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display, and particularly relates to a support film and a manufacturing method thereof, and a display module and a manufacturing method thereof. BACKGROUND

[0002] With the development of display technology, the screen-to-body ratio requirement of display devices is higher and higher. Flexible display panels have the advantages of bendability, good flexibility, light and thin volume, low power consumption, etc., and are used more and more widely. The back of the flexible display panel is provided with a support film. The existing bonding technology has the problem that the bonding precision of the support film and the flexible display panel cannot meet the requirements. SUMMARY

[0003] The embodiments of the present application provide a support film and a manufacturing method thereof, and a display module and a manufacturing method thereof, which improve the bonding precision of the support film and the display panel.

[0004] The embodiments of the first aspect of the present application provide a support film, comprising:

[0005] A support film body, the support film body comprising a first surface and a second surface oppositely arranged along a first direction, the support film body being provided with an opening hole penetrating through the support film body along the first direction, the first direction being parallel to a thickness direction of the support film body, the opening hole comprising a first side wall connected with the first surface and the second surface,

[0006] A first light shielding part, arranged in the support film body and exposing at least part of the opening hole, a projection of the first light shielding part on the first surface overlapping a projection of the first side wall on the first surface.

[0007] According to the embodiments of the first aspect of the present application, the first side wall is arranged obliquely relative to the first surface and the second surface; an included angle between the first side wall and the first surface is an acute angle, an intersection line between the first side wall and the first surface is a first intersection line, and an intersection line between the first side wall and the second surface is a second intersection line;

[0008] The projection of the first light shielding part on the first surface comprises a first boundary and a second boundary arranged in sequence along a second direction, a distance between the first boundary and the first intersection line along the second direction is less than a distance between the projection of the second intersection line on the first surface and the first intersection line along the second direction, wherein the second direction is a direction from the first intersection line to the projection of the second intersection line on the first surface;

[0009] Preferably, the projection of the first side wall on the first surface is located in the projection of the first light shielding part on the first surface, and an area of the projection of the first side wall on the first surface is less than an area of the projection of the first light shielding part on the first surface;

[0010] Preferably, the first boundary coincides with the first intersection line; and the second boundary is located on a side of the orthographic projection of the second intersection line on the first surface, which is away from the first intersection line.

[0011] Preferably, at least part of the first light shielding part is arranged on at least one of the first surface, the first side wall and the second surface.

[0012] According to any one of the foregoing embodiments of the first aspect of the present application, the support film body is transparent, and the first light shielding part comprises one or more of a colored coating and a colored adhesive tape.

[0013] According to any one of the foregoing embodiments of the first aspect of the present application, the opening further comprises a second side wall connected with the first surface and the second surface, the first side wall and the second side wall are arranged oppositely and parallel to each other in an extending direction;

[0014] The support film further comprises a second light shielding part arranged on the support film body and exposed in at least part of the opening, and an orthographic projection of the second light shielding part on the first surface overlaps with an orthographic projection of the second side wall on the first surface.

[0015] Preferably, the second side wall is arranged obliquely relative to the first surface and the second surface; an included angle between the second side wall and the first surface is an acute angle; the orthographic projection of the second light shielding part on the first surface comprises a third boundary and a fourth boundary arranged in sequence along a second direction, a distance between the fourth boundary and a third intersection line along the second direction is less than a distance between an orthographic projection of the fourth intersection line on the first surface and the third intersection line along the second direction, the third intersection line is an intersection line between the second side wall and the first surface, the fourth intersection line is an intersection line between the second side wall and the second surface, and the second direction is a direction from the orthographic projection of the fourth intersection line on the first surface to the third intersection line;

[0016] Preferably, the orthographic projection of the second side wall on the first surface is located within the orthographic projection of the second light shielding part on the first surface, and an area of the orthographic projection of the second side wall on the first surface is less than an area of the orthographic projection of the second light shielding part on the first surface.

[0017] Preferably, the fourth boundary coincides with the third intersection line, and the third boundary is located on a side of the orthographic projection of the fourth intersection line on the first surface, which is away from the third intersection line.

[0018] Preferably, at least part of the second light shielding part is arranged on at least one of the first surface, the second side wall and the second surface.

[0019] Preferably, the second light shielding part comprises one or more of a colored coating and a colored adhesive tape.

[0020] The embodiments of the second aspect of the present application also provide a display module, comprising a flexible display panel and any one of the support films provided by the first aspect of the present application.

[0021] The flexible display panel comprises a first non-bending portion, a second non-bending portion, and a bendable portion between the first non-bending portion and the second non-bending portion.

[0022] The support film is located on one side of the flexible display panel, the opening is arranged opposite to the bendable portion, the portions of the support film body located on both sides of the opening are bonded with the first non-bending portion and the second non-bending portion respectively, and the extension direction of the first side wall is parallel to the junction line of the first non-bending portion and the bendable portion.

[0023] The embodiment of the third aspect of the present application further provides a manufacturing method of a support film, comprising:

[0024] The first light shielding portion and the opening are formed on the support film body, wherein, in the orthographic projection of the first surface, the opening penetrates through the support film body along the first direction, the first direction is parallel to the thickness direction of the support film body, the opening comprises a first side wall connected with the first surface and the second surface, the first light shielding portion is arranged on the support film body and exposes at least part of the opening, and the orthographic projection of the first light shielding portion on the first surface overlaps the orthographic projection of the first side wall on the first surface.

[0025] According to the embodiment of the third aspect of the present application, before or after the first light shielding portion is formed on the support film body, the opening is punched out on the support film body by a cutter,

[0026] The first light shielding portion is formed on the support film body, comprising: coating a light shielding material for forming the first light shielding portion on the support film body.

[0027] According to any one of the foregoing embodiments of the third aspect of the present application, the first light shielding portion and the opening are formed on the support film body, comprising:

[0028] The opening is punched out on the support film body by a cutter, and the cutter is coated with a light shielding material for forming the first light shielding portion.

[0029] The embodiment of the fourth aspect of the present application further provides a manufacturing method of a display module, comprising:

[0030] The flexible display panel comprises a first non-bending portion, a second non-bending portion, and a bendable portion between the first non-bending portion and the second non-bending portion.

[0031] The support film comprises: a support film body and a first light shielding portion; the support film body comprises a first surface and a second surface arranged opposite along a first direction, the support film body is provided with an opening penetrating through the support film body along the first direction, the first direction is parallel to the thickness direction of the support film body, the opening comprises a first side wall connected with the first surface and the second surface, the first light shielding portion is arranged on the support film body and exposes at least part of the opening, and the orthographic projection of the first light shielding portion on the first surface overlaps the orthographic projection of the first side wall on the first surface.

[0032] determining a boundary position of the first light shielding portion,

[0033] aligning the flexible display panel and the support film according to the boundary position of the first light shielding portion;

[0034] adhering portions of the support film body located on both sides of the opening to the first non-bending portion and the second non-bending portion respectively.

[0035] According to the embodiment of the fourth aspect of the present application, after adhering the portions of the support film body located on both sides of the opening to the first non-bending portion and the second non-bending portion respectively, further comprising:

[0036] removing the first light shielding portion.

[0037] The support film provided by the present application comprises a support film body and a first light shielding portion arranged on the support film body. The support film body comprises a first surface and a second surface arranged oppositely along a first direction, and the support film body is provided with an opening penetrating through the thickness direction of the support film body. In the process of adhering the support film to the display panel, the opening needs to be aligned with the bendable portion of the display panel. At this time, the first light shielding portion can be used to define a positioning edge line for aligning with the positioning mark line on the display panel by limiting the side edge of the opening close to the first light shielding portion, so that the alignment of the positioning edge line and the positioning mark line can be used to realize the alignment of the opening and the bendable portion. Specifically, under the irradiation of light, the first light shielding portion forms a light shielding area, and the opening forms a light transmitting area. There is a clear boundary line between the light shielding area and the light transmitting area, which can define the positioning edge line. The opening comprises a first side wall connected to the first surface and the second surface. The first light shielding portion is overlapped with the first side wall in the first surface, so that at least part of the edge line in the first side wall is blocked by the first light shielding portion, which is a non-light transmitting area in identification. This can prevent the identification of the positioning edge line from being interfered by the edge line in the first side wall blocked by the first light shielding portion. The image acquisition device can only identify one edge, and only one boundary is presented, so as to prevent the identification of the positioning edge line from being interfered. This solves the problem that when no light shielding portion is arranged, the side wall of the opening is not perpendicular but inclined, which causes the image acquisition device to identify two edges of the same side wall, the image acquisition device abnormally captures the edge at the position of the first side wall, and the adhering precision of the support film and the display panel is poor. This makes the identification of the positioning edge line more accurate, so that the alignment of the positioning edge line and the positioning mark line on the display panel is more accurate, and the adhering effect of the support film and the display panel is better. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0039] Figure 1 is a bottom view structural schematic diagram of a support film provided by the embodiments of the present application;

[0040] Figure 2 is Figure 1 is a sectional structural schematic diagram of the A'-A' region in FIG. 8;

[0041] Figure 3 is a top view structural schematic diagram of a support film provided by the embodiments of the present application;

[0042] Figure 4 is Figure 3 is a sectional structural schematic diagram along B-B' in FIG. 9;

[0043] Figure 5 is a top view structural schematic diagram of a display panel provided by the embodiments of the present application;

[0044] Figure 6 is a sectional structural schematic diagram of a support film provided by the embodiments of the present application;

[0045] Figure 7 is a sectional structural schematic diagram of another support film provided by the embodiments of the present application;

[0046] Figure 8 is a sectional structural schematic diagram of another support film provided by the embodiments of the present application;

[0047] Figure 9 is a top view structural schematic diagram of another support film provided by the embodiments of the present application;

[0048] Figure 10 is Figure 9 is a sectional structural schematic diagram along C-C' in FIG. 11;

[0049] Figure 11 is a sectional structural schematic diagram of another support film provided by the embodiments of the present application;

[0050] Figure 12 is a sectional structural schematic diagram of another support film provided by the embodiments of the present application;

[0051] Figure 13 is a sectional structural schematic diagram of another support film provided by the embodiments of the present application;

[0052] Figure 14is a cross-sectional structure schematic diagram of a display module provided by an embodiment of the present application;

[0053] Figure 15 is another cross-sectional structure schematic diagram of a display module provided by an embodiment of the present application;

[0054] Figure 16 is a flow chart of a manufacturing method of a display module provided by an embodiment of the present application. DETAILED DESCRIPTION

[0055] Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.

[0056] It should be noted that, in this document, relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0057] A flexible display panel (hereinafter referred to as a display panel) includes a first planar region, a second planar region, and a bendable portion between the first planar region and the second planar region. The side of the display panel away from the light-emitting surface is attached with a support film 1', and the support film 1' is provided with an opening hole 10' in the region opposite to the bendable portion, so as to reduce the bending stress of the bendable portion. In the process of attaching the support film 1' to the display panel, the opening edge of the opening hole 10' needs to be grabbed for the positioning of the attachment of the support film to the flexible display panel, such as Figure 1 and Figure 2As shown, the support film 1' adopts a light-transmitting material, and the side wall of the opening 10' is inclined after the opening 10' is formed. When the opening edge of the opening 10' is grabbed in a direction perpendicular to the support film 1', there are two edges L1' and L2'. The edge that should be grabbed is the edge L2', and the distance between the edge L1' and the edge L2' is too close. The edge L1' will interfere with the edge L2', causing inaccurate grabbing, so that the fitting accuracy is difficult to meet the requirements. Based on the research on the above problems, the inventors provide a support film and a manufacturing method thereof, and a display module and a manufacturing method thereof, to improve the fitting accuracy of the support film and the display panel.

[0058] In order to better understand the present application, the following will be combined with Figures 3 to 16 The support film and the manufacturing method thereof, and the display module and the manufacturing method thereof according to the embodiments of the present application are described in detail.

[0059] Please refer to Figure 3 and Figure 4 The embodiments of the present application provide a support film 1 for fitting with a display panel 2 to provide support for the display panel 2.

[0060] The support film 1 includes a support film body 11 and a first light shielding portion 12. The support film body 11 includes a first surface 113 and a second surface 114 oppositely arranged along a first direction x. The support film body 11 is provided with an opening 111 penetrating through the support film body 11 along the first direction x. The first direction x is parallel to the thickness direction of the support film body 11. The opening 111 includes a first side wall 112 connected with the first surface 113 and the second surface 114. The first light shielding portion 12 is arranged on the support film body 11 and exposes at least part of the opening 111. The projection of the first light shielding portion 12 on the first surface 113 overlaps with the projection of the first side wall 112 on the first surface 113.

[0061] Optionally, the size of the projection of the first light shielding portion 12 on the first surface 113 along the second direction y is equal to the size of the projection of the first side wall 112 on the first surface 113 along the second direction y. The size of the projection of the first light shielding portion 12 on the first surface 113 along the second direction y is greater than the size of the projection of the first side wall 112 on the first surface 113 along the second direction y. The second direction can be perpendicular to the extension direction of the first side wall 112 (can be parallel to the first intersection line 115 between the first surface 113 and the first side wall 112, and can be parallel to the second intersection line 116 between the first side wall 112 and the second surface 114), and the second direction can be perpendicular to the first direction x.

[0062] Optionally, the orthographic projection of the first sidewall 112 on the first surface 113 is located within the orthographic projection of the first light-shielding part 12 on the first surface 113, and the area of ​​the orthographic projection of the first sidewall 112 on the first surface 113 is smaller than the area of ​​the orthographic projection of the first light-shielding part 12 on the first surface 113.

[0063] like Figure 5 As shown, the display panel 2 is a flexible display panel 2, which includes a first non-bending portion A1, a second non-bending portion A2, and a bendable portion W located between the first non-bending portion A1 and the second non-bending portion A2. A support film 1 is used to adhere to the side of the flexible display panel 2 opposite to the light-emitting surface to provide support for the flexible display panel 2. The bendable portion W of the flexible display panel 2 has positioning marks Mark for alignment with the support film 1. The size of the opening 111 along the second direction y can be greater than or equal to the size of the bendable portion W along the second direction y.

[0064] The support film 1 provided in this application includes a support film body 11 and a first light-shielding portion 12 disposed on the support film body 11. The support film body 11 includes a first surface 113 and a second surface 114 disposed opposite to each other along a first direction x. The support film body 11 includes an opening 111 penetrating the thickness of the support film body 11. During the process of bonding the support film 1 to the display panel 2, it is necessary to align the opening 111 with the bendable portion W of the display panel 2. At this time, a positioning edge line L for aligning with the positioning mark Mark on the display panel 2 can be defined by the edge of the first light-shielding portion 12 near the opening 111. Thus, the alignment of the opening 111 with the bendable portion W can be achieved by aligning the positioning edge line L with the positioning mark Mark. Specifically, under the illumination of light, the first light-shielding portion 12 blocks light to form a light-shielding area, and the opening 111 transmits light to form a light-transmitting area. There is a clear dividing line between the light-shielding area and the light-transmitting area, which defines the positioning edge line L. The opening 111 includes a first sidewall 112 connected to the first surface 113 and the second surface 114. The orthographic projection of the first light-shielding part 12 on the first surface 113 overlaps with the orthographic projection of the first sidewall 112 on the first surface 113, thereby blocking at least a portion of the edge line in the first sidewall 112. During recognition, it is an opaque area, which can prevent the edge line 116 blocked by the first light-shielding part 12 in the first sidewall 112 from interfering with the recognition of the positioning edge line L. This achieves the effect of preventing interference with the recognition of the positioning edge line L, and solves the problem that when the light-shielding part is not set, the image acquisition device has abnormal edge gripping at the first sidewall position, resulting in poor adhesion accuracy between the support film and the display panel. This makes the recognition of the positioning edge line L more accurate, thereby making the alignment of the positioning edge line L with the positioning mark of the display panel 2 more accurate, and thus making the adhesion effect between the support film 1 and the display panel 2 better.

[0065] The thickness of the display panel 2 is relatively thin, generally 0.03 mm. The display panel 2 is attached to the support film 1 on the side away from the light-emitting surface, so as to support the display panel 2 and prevent the display panel 2 from wrinkling. The thickness of the support film 1 is 0.075-0.125 mm. The support film body 11 is transparent and can be made of polyimide (PI) or polyethylene terephthalate (PET).

[0066] In an embodiment, the first light-shielding part 12 comprises one or more of a colored coating and a colored adhesive tape. The colored coating can be a black ink layer, and the colored adhesive tape can be a black adhesive tape. As an example, the color of the first boundary line 115 and the second boundary line 116 of the image acquisition device is changed to the color of the colored coating under the action of the colored coating, i.e., the first boundary line 115 and the second boundary line 116 are invisible.

[0067] The alignment of the opening 111 of the support film 1 and the bendable part W of the display panel 2 comprises: aligning the positioning edge line L of the support film 1 with the positioning mark Mark of the display panel 2 to be considered as successful alignment, or detecting the distance between the positioning edge line L and the positioning mark Mark and comparing it with a set distance, and aligning the positioning edge line L of the support film 1 with the positioning mark Mark of the display panel 2 in parallel and less than or equal to the set distance to be considered as successful alignment. The specific alignment method can be set according to actual conditions, and the present application does not make special limitations.

[0068] In an embodiment, as shown in FIG. 1, the first side wall 112 is arranged obliquely relative to the first surface 113 and the second surface 114. Figure 4 As an example, the angle a between the first side wall 112 and the first surface 113 is an acute angle. As an example, the angle between the first side wall 112 and the second surface 114 is an obtuse angle. The intersection line of the first side wall 112 and the first surface 113 is the first boundary line 115, and the intersection line of the first side wall 112 and the second surface 114 is the second boundary line 116. The orthogonal projection of the first light-shielding part 12 on the first surface 113 comprises the first boundary 121 and the second boundary 122 arranged in sequence along the second direction y. The distance d between the first boundary 121 and the first boundary line 115 along the second direction y is less than the distance D between the orthogonal projection of the second boundary line 116 on the first surface 113 and the first boundary line 115 along the second direction y. The second direction y is the direction from the first boundary line 115 to the orthogonal projection of the second boundary line 116 on the first surface 113.

[0069] In the above embodiments, the first side wall 112 of the opening 111 is obliquely arranged relative to the first surface 113 and the second surface 114, and is caused by the preparation process. Since the first side wall 112 is obliquely arranged, there is a first boundary line 115 intersecting the first surface 113 and a second boundary line 116 intersecting the second surface 114, and the first boundary line 115 and the second boundary line 116 are close to each other. Therefore, in the prior art, when the opening 111 is aligned with the bendable part of the display panel 2, and the first boundary line 115 is taken as the positioning edge line L, the first boundary line 115 and the second boundary line 116 are easily recognized in the alignment recognition process. The second boundary line 116 will interfere with the recognition of the first boundary line 115, thereby easily causing alignment deviation. Optionally, the first boundary 121 can be parallel to the first boundary line 115.

[0070] Due to the effect of the first light shielding part 12, the first boundary line 115 and the second boundary line 116 are shielded or hidden by the first light shielding part 12, so that the first boundary line 115 and the second boundary line 116 cannot be recognized by the image acquisition device. The second boundary 122 is far away from the first boundary 121, so that the second boundary 122 cannot be recognized by the image acquisition device, and only the first boundary 121 can be recognized by the image acquisition device. Therefore, the image acquisition device can only recognize one edge (i.e., the first boundary 121) at the first side wall 112, avoiding abnormal edge grabbing during attachment, and improving the attachment precision.

[0071] Optionally, the second boundary 122 and the second boundary line 116 have a first gap z between the orthographic projections on the first surface 113. Along the second direction y, the greater the distance between the first boundary 121 and the second boundary 122, the smaller the interference of the second boundary 122 on the first boundary 121.

[0072] In the embodiments of the present application, the first light shielding part 12 formed on the support film 1 achieves the effect of accurate positioning. Specifically, the first light shielding part 12 has a first boundary 121 and a second boundary 122 arranged in sequence along the second direction y in the orthographic projection of the first surface 113, and the second direction y is the direction from the first boundary line 115 to the second boundary line 116 in the orthographic projection of the first surface 113. In the process of identification and alignment, the support film 1 is provided with light, and under the irradiation of the light, the first light shielding part 12 forms a light shielding area and a light transmission area, and there is a clear boundary between the light shielding area and the light transmission area, which is the defined positioning edge line L, and the boundary is located at the first boundary 121, that is, the positioning edge line L can be defined by the first boundary 121 of the first light shielding part 12. Since the second boundary 122 has a first gap z with the second boundary line 116, and the orthographic projection of the first side wall 112 on the first surface 113 is located in the orthographic projection of the first light shielding part 12 on the first surface 113, the second boundary line 116 is shielded by the first light shielding part 12 and thus cannot be identified. Since the distance d between the first boundary 121 and the first boundary line 115 along the second direction y is less than the distance D between the orthographic projection of the second boundary line 116 on the first surface 113 and the first boundary line 115, the distance error of identification by the defined positioning edge line L is smaller than that by the second boundary line 116, thereby improving the alignment accuracy.

[0073] In the above embodiments, the second boundary 122 has a first gap z with the second boundary line 116, and the orthographic projection of the first side wall 112 on the first surface 113 is located in the orthographic projection of the first light shielding part 12 on the first surface 113, that is, the second boundary 122 is located on the side of the orthographic projection of the second boundary line 116 on the first surface 113 away from the first boundary line 115, and the width value of the first gap z along the second direction y can be set to be greater than a preset value, so that the second boundary 122 does not affect the identification of alignment. The preset value is greater than 1 mm, that is, z is greater than 1 mm. The preset value can be adjusted to adjust the light shielding range, so as to prevent the side of the first light shielding part 12 away from the opening from interfering with the identification of the positioning edge line L defined by the first light shielding part 12. Specifically, the orthographic projection of the first light shielding part 12 on the support film 1 can cover only part of the support film 1 or cover the entire support film 1.

[0074] In a feasible embodiment, as shown in FIG. 1B, Figure 4 The first boundary 121 coincides with the first boundary line 115. The lengths of the first boundary 121 and the first boundary line 115 can be equal or unequal. Alternatively, the first boundary 121 is located on the side of the orthographic projection of the first boundary line 115 on the first surface 113 away from the second boundary line 116. The closer the distance between the first boundary 121 and the first boundary line 115, the more accurate the alignment.

[0075] In the above embodiment, by setting the first boundary 121 to coincide with the first junction line 115, the accuracy of the alignment recognition can be further improved without changing the previous alignment standard (by aligning the first junction line 115 in the first side wall 112 with the positioning mark line on the display panel 2), so that the alignment of the support film 1 and the display panel 2 is better.

[0076] In a possible implementation, at least part of the first light shielding portion 12 is arranged on at least one of the first surface 113, the first side wall 112, and the second surface 114.

[0077] In a possible implementation, as shown in FIG. 1, the first light shielding portion 12 is arranged on the first surface 113, and the first boundary 121 coincides with the first junction line 115. At this time, the positioning edge line L defined by the first light shielding portion 12 coincides with the first boundary 121 and the first junction line 115. The coincidence of the positioning edge line L and the first junction line 115 can greatly reduce the deviation during recognition, further improve the accuracy of the alignment recognition, and make the alignment of the support film 1 and the display panel 2 better. Figure 4

[0078] In another possible implementation, as shown in FIG. 2, the first light shielding portion 12 is arranged on the second surface 114, and the orthographic projection of the first boundary 121 on the first surface 113 coincides with the orthographic projection of the first junction line 115 on the first surface 113. At this time, the orthographic projection of the positioning edge line L on the first surface 113 coincides with the orthographic projection of the first junction line 115 on the first surface 113. The coincidence can greatly reduce the deviation during recognition, further improve the accuracy of the alignment recognition, and make the alignment of the support film 1 and the display panel 2 better. Figure 6 In another possible implementation, as shown in FIG. 3 and FIG. 4, the first light shielding portion 12 includes a first portion 123 arranged on the first side wall 112 and a second portion 124 arranged on the second surface 114. The orthographic projection of the first portion 123 on the plane of the first surface 113 has a first preset distance between the edge of the first portion 123 toward the side of the opening 111 and the first junction line 115. The first preset distance can be 0, in which case the deviation during recognition can be greatly reduced, the accuracy of the alignment recognition can be further improved, and the alignment of the support film 1 and the display panel 2 is better. Alternatively, the first preset distance is d, 0 < d < D, where D is the distance between the orthographic projection of the second junction line 116 on the first surface 113 and the first junction line 115. At this time, the positioning edge line L defined by the first light shielding portion 12 has a smaller distance error than the distance error of the second junction line 116 after the recognition error, so that the alignment accuracy can be improved.

[0079] Figure 7 Figure 8 In another possible implementation, as shown in FIG. 3 and FIG. 4, the first light shielding portion 12 includes a first portion 123 arranged on the first side wall 112 and a second portion 124 arranged on the second surface 114. The orthographic projection of the first portion 123 on the plane of the first surface 113 has a first preset distance between the edge of the first portion 123 toward the side of the opening 111 and the first junction line 115. The first preset distance can be 0, in which case the deviation during recognition can be greatly reduced, the accuracy of the alignment recognition can be further improved, and the alignment of the support film 1 and the display panel 2 is better. Alternatively, the first preset distance is d, 0 < d < D, where D is the distance between the orthographic projection of the second junction line 116 on the first surface 113 and the first junction line 115. At this time, the positioning edge line L defined by the first light shielding portion 12 has a smaller distance error than the distance error of the second junction line 116 after the recognition error, so that the alignment accuracy can be improved.

[0080] ​​​In an embodiment, the opening 111 can include a first opening on the first surface 113 and a second opening on the second surface 114, both of which can be rectangular, and the area of the first opening in the projection of the first surface 113 can be smaller than the area of the second opening in the projection of the second surface 114. Alternatively, the opening 111 can also have other shapes, which are not particularly limited in the present application.

[0081] In an embodiment, as shown in FIG. 1, the opening 111 further includes a second side wall 117, and the extending direction of the first side wall 112 and the second side wall 117 (parallel to the third direction) are parallel and oppositely arranged. The support film 1 further includes a second light shielding portion 13 arranged on the support film body 11 and exposed in at least part of the opening 111. The projection of the second light shielding portion 13 on the first surface 113 overlaps with the projection of the second side wall 117 on the first surface 113. Figure 9 Figure 10 In an embodiment, as shown in FIG. 1, the opening 111 further includes a second side wall 117, and the extending direction of the first side wall 112 and the second side wall 117 (parallel to the third direction) are parallel and oppositely arranged. The support film 1 further includes a second light shielding portion 13 arranged on the support film body 11 and exposed in at least part of the opening 111. The projection of the second light shielding portion 13 on the first surface 113 overlaps with the projection of the second side wall 117 on the first surface 113.

[0082] Optionally, the dimension of the overlapping area of the projection of the second light shielding portion 13 on the first surface 113 and the projection of the second side wall 117 on the first surface 113 along the second direction y is equal to the dimension of the projection of the second side wall 117 on the first surface 113 along the second direction y. The dimension of the projection of the second light shielding portion 13 on the first surface 113 along the second direction y is greater than the dimension of the projection of the second side wall 117 on the first surface 113 along the second direction y.

[0083] Optionally, the projection of the second side wall 117 on the first surface 113 is located within the projection of the second light shielding portion 13 on the first surface 113, and the area of the projection of the second side wall 117 on the first surface 113 is smaller than the area of the projection of the second light shielding portion 13 on the first surface 113.

[0084] In an embodiment, the second side wall 117 is arranged obliquely relative to the first surface 113 and the second surface 114. Optionally, the angle a' between the second side wall 117 and the first surface 113 is an acute angle, and the angle between the second side wall 117 and the second surface 114 is an obtuse angle. The projection of the second light shielding portion 13 on the first surface 113 includes a third boundary 131 and a fourth boundary 132 arranged in sequence along the second direction y, and the distance between the fourth boundary 132 and the third boundary 118 along the second direction y is smaller than the distance between the fourth boundary 119 and the third boundary 118 along the second direction y in the projection of the first surface 113, the third boundary 118 is the boundary between the second side wall 117 and the first surface 113, the fourth boundary 119 is the boundary between the second side wall 117 and the second surface 114, and the second direction y is the direction from the projection of the fourth boundary 119 on the first surface 113 to the third boundary 118.

[0085] ​In one possible implementation, the fourth boundary 132 coincides with the third boundary line 118. The lengths of the fourth boundary 132 and the third boundary line 118 may be equal or unequal. Optionally, the fourth boundary 132 may be located on the side of the third boundary line 118 away from the orthographic projection of the fourth boundary line 119 onto the first surface 113.

[0086] Due to the function of the second light-shielding part 13, the third boundary line 118 and the fourth boundary line 119 are blocked or hidden by the second light-shielding part 13, resulting in the third boundary line 118 and the fourth boundary line 119 not being recognized by the image acquisition device. The distance between the third boundary 131 and the fourth boundary 132 is relatively large, resulting in the third boundary 131 not being recognized by the image acquisition device. Only the fourth boundary 132 is recognized by the image acquisition device, so that the image acquisition device can only recognize one edge (i.e., the fourth boundary 132) at the second sidewall 117, avoiding abnormal edge gripping during attachment, thereby improving attachment accuracy. Optionally, the fourth boundary 132 can be parallel to the third boundary line 118.

[0087] In one possible implementation, the third boundary 131 is located on the side of the first surface 113 from which the orthographic projection of the fourth boundary line 119 is away from the third boundary line 18.

[0088] Optionally, the distance between the orthographic projection of the fourth boundary line 119 on the first surface 113 and the third boundary 131 along the second direction is greater than 1mm, so as to avoid the third boundary 131 interfering with the fourth boundary 132, so that the image acquisition device can only identify one edge (i.e. the fourth boundary 132) at the second side wall 117, avoiding the identification of two edges during attachment, which would lead to abnormal edge gripping, thereby improving the attachment accuracy.

[0089] In one possible implementation, at least a portion of the second light-shielding portion 13 is disposed on at least one of the first surface 113, the second sidewall 117, and the second surface 114.

[0090] In one feasible implementation, such as Figure 10 As shown, the second light-shielding part 13 is disposed on the first surface 113, and the fourth boundary 132 coincides with the third boundary line 118.

[0091] In another feasible implementation, such as Figure 11 As shown, the second light-shielding part 13 is located on the second surface 114, and the orthographic projection of the fourth boundary 132 on the first surface 113 coincides with the orthographic projection of the third boundary line 118 on the first surface 113.

[0092] In another feasible implementation, such as Figure 12 and Figure 13As shown, the second light-shielding portion 13 includes a third portion 133 located on the third part of the second sidewall 117 and a fourth portion 134 located on the second surface 114. Among them, in the orthographic projection of the third portion 133 on the plane where the first surface 113 is located, there is a first preset distance between the edge facing the opening 111 and the third intersection line 118. This first preset distance can be 0. At this time, the deviation can be greatly reduced during recognition, further improving the accuracy of alignment recognition, and making the alignment effect between the support film 1 and the display panel 2 better. Or the first preset distance is d', 0 < d' < D', where D' is the distance between the orthographic projection of the fourth intersection line 119 on the first surface 113 and the third intersection line 118. At this time, alignment recognition is performed through the defined positioning edge line L', and the distance error is smaller than that when recognition is performed through the fourth intersection line 119 after recognition error, thereby improving the alignment accuracy.

[0093] In a feasible implementation, the second light-shielding portion 13 includes one or more of a colored coating and a colored tape. Among them, the colored coating can be a black ink layer, and the colored tape can be a black tape.

[0094] In the above implementation, the opening 111 includes a second sidewall 117 opposite to the first sidewall 112, and the support film for flexible display 1 further includes a second light-shielding portion 13. The second light-shielding portion 13 can be selected to define a positioning edge line L for aligning the opening 111 with the bendable portion of the display panel 2. Or, on the basis of using the first light-shielding portion 12 to define the positioning edge line L, another positioning edge line L is defined through the second light-shielding portion 13, which can correspond to another positioning marking line in the flexible display panel 2 to achieve auxiliary positioning.

[0095] In the above implementation, the positional relationship between the second light-shielding portion 13 and the second sidewall 117 and the alignment process are the same as or similar to the positional relationship between the first light-shielding portion 12 and the first sidewall and the alignment process, and will not be elaborated in this application.

[0096] This application also provides a display module 3, as Figure 14 and Figure 15 shown, including a flexible display panel 2 and any one of the support films 1 provided in the above implementation.

[0097] The flexible display panel 2 includes a first non-bendable portion A1, a second non-bendable portion A2, and a bendable portion W located between the first non-bendable portion A1 and the second non-bendable portion A2.

[0098] The support film 1 is located on one side of the flexible display panel 2, the opening 111 is disposed opposite to the bendable portion W, the portions of the support film body 11 on both sides of the opening 111 are respectively bonded to the first non-bendable portion A1 and the second non-bendable portion A2, and the extending direction of the first sidewall 112 is parallel to the intersection line between the first non-bendable portion A1 and the bendable portion W.

[0099] In the above embodiments, as shown in Figure 14 the second surface 114 of the support film 1 is attached to the side of the flexible display panel 2 away from the light-out surface, or, as shown in Figure 15 the first surface 113 of the support film 1 is attached to the side of the flexible display panel 2 away from the light-out surface.

[0100] The positioning mark Mark in the flexible display panel 2 is arranged in parallel with the intersection line of the first non-bending portion A1 and the bendable portion W, and the positioning edge line L defined by the first light-shielding portion 12 of the support film 1 is aligned with the positioning mark Mark, so that the opening 111 of the support film 1 is aligned with the bendable portion, and the support film 1 is well attached to the flexible display panel 2, that is, the yield of the display module 3 provided by the present application is higher, and the product quality is better.

[0101] In the above display module 3, the attachment precision of the flexible display panel 2 and the support film 1 is improved, so that the stress of the support film 1 on the bendable portion W of the display panel 2 is avoided, the bending performance of the bendable portion W of the display panel 2 is ensured, the bendable portion W of the display panel 2 is easy to bend and not easy to rebound after bending, and the stability of the display module 3 is ensured.

[0102] The display module 3 further includes an adhesive layer 4 for bonding and fixing the display panel 2 and the support film 1, a bending protection layer 5 formed on the side of the flexible display panel 2 away from the support film 1, a polarizing plate 6 formed on the side of the bending protection layer away from the first non-bending portion A1, and a buffer layer 7 formed on the side of the support film 1 away from the flexible display panel 2, wherein the bending protection layer (BPL) is a glue layer, and the material of the buffer layer is foam or the like, which plays a cushioning role and also plays a cushioning role, so that the first non-bending portion A1 and the second non-bending portion A2 are arranged in parallel after bending.

[0103] The present application also provides a manufacturing method of the support film 1, which can be used to manufacture the support film 1 in the above embodiments. The manufacturing method of the support film includes:

[0104] The first light shielding part 12 is formed on the support film body 11, and exposes at least part of the opening hole 111. A projection of the first light shielding part 12 on the first surface 113 overlaps with a projection of the first side wall 112 on the first surface 113. Optionally, a projection of the first side wall 112 on the first direction x is located within a projection of the first light shielding part 12 on the first direction x, and an area of the projection of the first side wall 112 on the first direction x is smaller than an area of the projection of the first light shielding part 12 on the first direction x.

[0105] In the above embodiments, the first light shielding part 12 is formed on the support film 1, so that the positioning edge line L can be defined by the first light shielding part 12, and the edge of the opening hole 111 can not interfere with the identification of the positioning edge line L, so that the positioning edge line L can be more accurately aligned with the positioning mark line of the display panel 2 when the support film 1 is attached to the flexible display panel 2, and the attachment effect of the support film 1 and the display panel 2 is better.

[0106] The manufacturing method of the support film can be used to manufacture the support film in the above embodiments, so the manufacturing method of the support film has the beneficial effects of the above embodiments, which will not be repeated here.

[0107] In a possible implementation, the opening hole 111 is punched on the support film body 11 by a cutter before or after the first light shielding part 12 is formed on the support film body 11.

[0108] In a possible implementation, forming the first light shielding part 12 on the support film body 11 includes applying a light shielding material for forming the first light shielding part 12 on the support film body 11.

[0109] In the above embodiments, the cutter cross section can be triangular, and the cutter tip is located at one corner of the triangle, so that the opening hole 111 formed has an inclined first side wall 112 and a second side wall 117.

[0110] In the above embodiments, the light shielding material can be a black ink layer or a black adhesive tape. When the light shielding material is a black ink layer, the first light shielding part 12 can be formed by silk printing or spraying. When the light shielding material is a black adhesive tape, the first light shielding part 12 can be formed by bonding. The light shielding material can also be selected from other materials, which are not particularly limited in the present application.

[0111] In the above embodiment, the light-shielding material for forming the first light-shielding portion 12 is coated on the support film body 11 first, and then the opening 111 is punched, so that the specific shape of the first light-shielding portion 12 can be formed at the same time of punching the opening 111, the precision control in forming the first light-shielding portion 12 is reduced, and the coincidence of the first boundary and the first junction line is easily ensured. That is, the light-shielding material is formed on the first surface 113, then the cutter contacts the preset position of the second surface 114 opposite to the light-shielding portion, and moves from the second surface 114 to the first surface 113 to punch the opening 111. At the same time of punching the opening 111, the edge of the light-shielding material is aligned with the edge of the opening 111, so that the specific shape of the first light-shielding portion 12 is formed, and there is no need to specially make the first light-shielding portion 12 after the light-shielding material is formed, thus simplifying the preparation process.

[0112] In an available embodiment, forming the first light-shielding portion 12 and the opening 111 on the support film body 11 comprises: punching the opening 111 on the support film body 11 by a cutter, and the cutter is coated with the light-shielding material for forming the first light-shielding portion 12.

[0113] In the above embodiment, the light-shielding material can be black ink, the black ink is sprayed on the cutter, or the cutter is dipped in the ink, and then the support film 1 is punched, so that the second part in the first light-shielding portion 12 is formed on the side wall of the support film 1 after punching, the precision control process of separately preparing the second part is avoided, the preparation process is simplified, the two steps of punching and coating the light-shielding material are combined into one step, and the efficiency is improved. Since the thickness d of the second part formed by the black ink is smaller than the distance D between the orthogonal projection of the second junction line 116 on the first surface 113 and the first junction line 115, the edge L of the black ink is recognized for subsequent bonding, the bonding error is reduced, and the bonding precision is improved.

[0114] In an available embodiment, the manufacturing method of the support film comprises: forming the first light-shielding portion 12, the second light-shielding portion 13 and the opening 111 on the support film body 11. The forming process of the second light-shielding portion 13 is the same as or similar to that of the first light-shielding portion 12.

[0115] The application also provides a manufacturing method of a display module, as shown in Figure 16 The manufacturing method of the display module can be used to manufacture the display module in the above embodiments, and the manufacturing method of the display module comprises:

[0116] S100, providing a flexible display panel 2, the flexible display panel 2 comprising a first non-bending portion A1, a second non-bending portion A2, and a bendable portion W between the first non-bending portion A1 and the second non-bending portion A2.

[0117] The bendable portion of the flexible display panel 2 is formed with an alignment mark line Mark.

[0118] S200, providing a support film 1, the support film 1 comprising: a support film body 11 and a first light shielding portion 12; the support film body 11 comprising a first surface 113 and a second surface 114 oppositely arranged along a first direction x, the support film body 11 being provided with an opening 111 penetrating through the support film body 11 along the first direction x, the first direction x being parallel to a thickness direction of the support film body 11, the opening 111 comprising a first side wall 112 connected with the first surface 113 and the second surface 114, the first light shielding portion 12 being arranged on the support film body 11 and exposing at least part of the opening 111. A projection of the first light shielding portion 12 on the first surface 113 overlaps a projection of the first side wall 112 on the first surface 113.

[0119] Optionally, a projection of the first side wall 112 on the first surface 113 is located within a projection of the first light shielding portion 12 on the first surface 113, and an area of the projection of the first side wall 112 on the first surface 113 is smaller than an area of the projection of the first light shielding portion 12 on the first surface 113.

[0120] S300, determining a boundary position of the first light shielding portion 12.

[0121] The determination of the boundary position of the first light shielding portion 12 can be achieved by identifying a position of a first boundary 121 of the first light shielding portion 12 through an image acquisition device. Specifically, a light ray perpendicular to the support film 1 is provided to the opening 111, for example, the light ray is lifted by a micro laser, the range of the light ray of the micro laser is easy to control, and then the boundary position of the first light shielding portion 12 is identified through a photosensitive element, which can be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. Optionally, the manufacturing method of the display module can further comprise: determining a boundary position of a second light shielding portion 13. The determination of the boundary position of the second light shielding portion 13 can be achieved by identifying a position of a fourth boundary 132 of the second light shielding portion 13 through an image acquisition device.

[0122] S400, aligning the flexible display panel 2 and the support film 1 according to the boundary position of the first light shielding portion 12.

[0123] Optionally, the manufacturing method of the display module can further comprise: aligning the flexible display panel 2 and the support film 1 according to the position of the fourth boundary 132 of the second light shielding portion 13.

[0124] S500, respectively bond the portions of the support film body 11 located on both sides of the opening 111 with the first non-bending portion A1 and the second non-bending portion A2.

[0125] In the manufacturing method of the display module provided in the present application, the first light shielding portion 12 is formed on the support film 1, and the positioning edge line L for alignment with the positioning mark on the display panel 2 is defined by the boundary position of the first light shielding portion 12 close to the opening 111, so that the alignment of the opening 111 with the bendable portion can be realized by aligning the positioning edge line L with the positioning mark. Specifically, under the irradiation of light, the first light shielding portion 12 forms a light shielding area by shielding light, and the opening 111 forms a light transmitting area by transmitting light, and there is a clear boundary line between the light shielding area and the light transmitting area, i.e., the positioning edge line L can be defined. The support film body 11 includes a first surface 113 and a second surface 114 arranged opposite along the first direction x. The opening 111 includes a first side wall 112 connected with the first surface 113 and the second surface 114, and the orthographic projection of the first side wall 112 on the first surface 113 is located within the orthographic projection of the first light shielding portion 12 on the first surface 113, and the orthographic projection of the first light shielding portion 12 on the first surface 113 overlaps with the orthographic projection of the first side wall 112 on the first surface 113, so that at least part of the edge line in the first side wall 112 is shielded by the first light shielding portion 12, which is a non-light transmitting area in identification, and interference caused by the edge line in the first side wall 112 shielded by the first light shielding portion 12 to the identification of the positioning edge line L can be prevented, so as to achieve the effect of preventing interference with the identification of the positioning edge line L, so that the identification of the positioning edge line L is more accurate, so that the alignment of the positioning edge line L with the positioning mark of the display panel 2 is more accurate, and thus the bonding effect of the support film 1 with the display panel 2 is better. The yield of the display module prepared by the above-mentioned manufacturing method of the display module is higher, and the quality is better.

[0126] The manufacturing method of the display module can be used to manufacture the display module in the above-mentioned embodiments, so the manufacturing method of the display module has the beneficial effects of the above-mentioned embodiments, which will not be repeated here.

[0127] In the above-mentioned embodiments, the opening 111 in the support film 1 exposes at least part of the bendable portion, and when the bendable portion of the flexible display panel 2 is bent, the opening 111 can reduce the bending stress during bending, and the bending effect is easier to maintain.

[0128] When the support film 1 and the flexible display panel 2 are attached with a deviation, part of the support film 1 will lose its function. Specifically, in the flexible display panel 2 and the support film 1 attached to each other, along the arrangement direction of the first non-bending part A1 and the second non-bending part A2, the width of the opening on the side of the opening 111 in contact with the bendable part W is the same as the width of the bendable part to expose the bendable part, or the width of the opening on the side of the opening 111 in contact with the bendable part W is greater than the width of the bendable part, at this time the opening 111 exposes the bendable part and part of the first non-bending part A1 and / or part of the second non-bending part A2. When the support film 1 and the flexible display panel 2 are attached with a deviation, it is easy to cause the part of the opening 111 that should expose the bendable part to correspond to the first non-bending part A1 or the second non-bending part A2, while increasing the area of the support film 1 covering the bendable part, thereby causing the bendable part to be supported by the support film 1, so that the bending stress of the part is increased, causing the flexible display panel 2 to be not easy to bend and easy to rebound after bending. After the deviation, the position that should be supported by the support film 1 is exposed by the opening 111, losing the support of the support film 1 on the part, so that the support of the part in the flexible display panel 2 is poor. The manufacturing method of the display module provided in the present application improves the attachment precision of the flexible display panel 2 and the support film 1, so that the opening 111 accurately exposes the bendable part, and the opening 111 accurately exposes the bendable part, so that the stress relief effect of the opening 111 is maximized, and the support effect of the support film 1 is maximized. It helps to improve the overall performance of the flexible display panel 2 and the support film 1.

[0129] In a feasible implementation, after the parts of the support film body 11 located on both sides of the opening 111 are respectively bonded with the first non-bending part A1 and the second non-bending part A2, the method further comprises:

[0130] Removing the first light shielding part 12.

[0131] In the above implementation, when the first light shielding part 12 adopts a black tape, and the first light shielding part 12 is formed on the side surface of the support film 1 that is not attached to the flexible display panel 2, the black tape can be removed after the support film 1 is attached to the flexible display panel 2 to prevent the black tape from affecting the subsequent process. For example, since the black tape has a certain thickness, when the black tape does not completely cover the side surface of the support film 1 that is not attached to the flexible display panel 2, it will cause the side surface of the support film 1 away from the flexible display panel 2 to be uneven, affecting the preparation of the subsequent film layer.

[0132] In accordance with the embodiments of the application described above, these embodiments are not meant to be exhaustive or limiting of the application. Many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the above teachings. Accordingly, the scope of the present application should be determined not with reference to the above description, but with reference to the appended claims along with their full scope of equivalents.

Claims

1. A support membrane, characterized in that, include: A supporting membrane body includes a first surface and a second surface disposed opposite to each other along a first direction. The supporting membrane body has an opening penetrating through it along the first direction, which is parallel to the thickness direction of the supporting membrane body. The opening includes a first sidewall connected to the first surface and the second surface. A first light-shielding portion is disposed on the supporting membrane body and exposes at least a portion of the opening, wherein the orthographic projection of the first light-shielding portion on the first surface overlaps with the orthographic projection of the first sidewall on the first surface.

2. The support membrane according to claim 1, characterized in that, The first sidewall is inclined relative to the first surface and the second surface; the angle between the first sidewall and the first surface is an acute angle, the boundary line between the first sidewall and the first surface is a first boundary line, and the boundary line between the first sidewall and the second surface is a second boundary line. The orthographic projection of the first light-shielding portion onto the first surface includes a first boundary and a second boundary arranged sequentially along a second direction. The distance between the first boundary and the first boundary line along the second direction is less than the distance between the orthographic projection of the second boundary line onto the first surface and the first boundary line along the second direction. The second direction is the direction from the first boundary line to the orthographic projection of the second boundary line onto the first surface.

3. The support membrane according to claim 2, characterized in that, The orthographic projection of the first sidewall onto the first surface lies within the orthographic projection of the first light-shielding part onto the first surface, and the area of ​​the orthographic projection of the first sidewall onto the first surface is smaller than the area of ​​the orthographic projection of the first light-shielding part onto the first surface.

4. The support membrane according to claim 2, characterized in that, The first boundary coincides with the first boundary line, and the second boundary is located on the side of the first surface where the orthographic projection of the second boundary line is away from the first boundary line.

5. The support membrane according to claim 1, characterized in that, At least a portion of the first light-shielding portion is disposed on at least one of the first surface, the first sidewall, and the second surface.

6. The support membrane according to claim 1, characterized in that, The supporting film body is transparent, and the first light-shielding part includes one or more of a colored coating and a colored tape.

7. The support membrane according to claim 1, characterized in that, The opening further includes a second sidewall connected to the first surface and the second surface, wherein the first sidewall and the second sidewall extend in parallel directions and are disposed opposite to each other; The support film further includes a second light-shielding portion disposed on the support film body and exposing at least a portion of the opening, wherein the orthographic projection of the second light-shielding portion on the first surface overlaps with the orthographic projection of the second sidewall on the first surface.

8. The support membrane according to claim 7, characterized in that, The second sidewall is inclined relative to the first surface and the second surface. The boundary line between the second sidewall and the first surface is the third boundary line, and the boundary line between the second sidewall and the second surface is the fourth boundary line. The angle between the second sidewall and the first surface is an acute angle. The orthographic projection of the second light-shielding part on the first surface includes a third boundary and a fourth boundary arranged sequentially along the second direction. The distance between the fourth boundary and the third boundary line along the second direction is less than the distance between the orthographic projection of the fourth boundary line on the first surface and the third boundary line along the second direction. The second direction is the direction from the orthographic projection of the fourth boundary line on the first surface to the third boundary line.

9. The support membrane according to claim 7, characterized in that, The orthographic projection of the second sidewall onto the first surface lies within the orthographic projection of the second light-shielding part onto the first surface, and the area of ​​the orthographic projection of the second sidewall onto the first surface is smaller than the area of ​​the orthographic projection of the second light-shielding part onto the first surface.

10. The support membrane according to claim 8, characterized in that, The fourth boundary coincides with the third boundary line, and the third boundary is located on the side of the first surface where the orthographic projection of the fourth boundary line is away from the third boundary line.

11. The support membrane according to claim 7, characterized in that, At least a portion of the second light-shielding portion is disposed on at least one of the first surface, the second sidewall, and the second surface.

12. The support membrane according to claim 7, characterized in that, The second light-shielding part includes one or more of a colored coating and a colored tape.

13. A display module, characterized in that, Includes a flexible display panel and a support film as described in any one of claims 1-12; The flexible display panel includes a first non-bending portion, a second non-bending portion, and a bendable portion located between the first non-bending portion and the second non-bending portion; The support film is located on one side of the flexible display panel, the opening is disposed opposite to the bendable portion, the portions of the support film body located on both sides of the opening are respectively bonded to the first non-bendable portion and the second non-bendable portion, and the extension direction of the first sidewall is parallel to the boundary line between the first non-bendable portion and the bendable portion.

14. A method for manufacturing a support membrane, characterized in that, include: A first light-shielding portion and an opening are formed on a supporting film body. The supporting film body includes a first surface and a second surface disposed opposite to each other along a first direction. The opening penetrates the supporting film body along the first direction, which is parallel to the thickness direction of the supporting film body. The opening includes a first sidewall connected to the first surface and the second surface. The first light-shielding portion is disposed on the supporting film body and exposes at least a portion of the opening. The orthographic projection of the first light-shielding portion on the first surface overlaps with the orthographic projection of the first sidewall on the first surface.

15. The method for manufacturing the support membrane according to claim 14, characterized in that, Before or after forming the first light-shielding portion on the support film body, an opening is punched out on the support film body using a cutting tool. Forming a first light-shielding portion on a support film body includes: coating a light-shielding material for forming the first light-shielding portion onto the support film body.

16. The method for manufacturing the support membrane according to claim 14, characterized in that, Forming the first light-shielding portion and opening on the support membrane body includes: An opening is punched into the support membrane body using a cutting tool, and the cutting tool is coated with a light-shielding material for forming the first light-shielding part.

17. A method for manufacturing a display module, characterized in that, include: A flexible display panel is provided, the flexible display panel including a first non-bending portion, a second non-bending portion, and a bendable portion located between the first non-bending portion and the second non-bending portion; A support film is provided, the support film comprising: a support film body and a first light-shielding portion; the support film body includes a first surface and a second surface disposed opposite to each other along a first direction, the support film body having an opening penetrating the support film body along the first direction, the first direction being parallel to the thickness direction of the support film body, the opening including a first sidewall connected to the first surface and the second surface, the first light-shielding portion being disposed on the support film body and exposing at least a portion of the opening, the orthographic projection of the first light-shielding portion on the first surface overlapping the orthographic projection of the first sidewall on the first surface; Determine the boundary position of the first light-shielding part. The flexible display panel and the support film are aligned according to the boundary position of the first light-shielding part; The portions of the supporting membrane body located on both sides of the opening are respectively bonded to the first non-bending portion and the second non-bending portion.

18. The method for manufacturing a display module according to claim 17, characterized in that, After bonding the portions of the support membrane body located on both sides of the opening to the first non-bending portion and the second non-bending portion respectively, the method further includes: Remove the first light-blocking part.

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