Display module, display device and preparation method

Abstract

The application discloses a display module, a display device and a preparation method. The display module comprises a functional film layer, a cover plate arranged on the display side of the functional film layer, and a side wall protection film located between a positioning film and the side wall of the functional film layer and covering the side wall of the functional film layer. The positioning film is arranged on the cover plate and located on the same side of the functional film layer as the cover plate, and surrounds the side wall of the functional film layer and is arranged at intervals from the side wall of the functional film layer. When the protective glue is applied to the side wall of the functional film layer to form a side wall protection layer through self-flowing of the protective glue, the positioning film can limit the self-flowing range of the protective glue on the cover plate, control the morphology of the side wall protection film, reduce the size fluctuation of the width of the side wall protection film on the cover plate, and make the middle frame design and the frame width of the whole machine not affected by the morphology of the side wall protection film.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a display module, display device, and manufacturing method. Background Technology

[0002] Given the sidewall protection requirements for flexible OLED display modules from end customers, such as Figure 1 and Figure 2 As shown, sidewall protective film needs to be sprayed on the sidewalls of each functional film layer in the display module. However, the width L' of the formed sidewall protective film on the cover plate fluctuates greatly, which not only affects the design of the middle frame of the whole machine, but also requires a large space to be reserved at the edge of the cover plate, resulting in a larger bezel width of the whole machine, which contradicts the end customer's demand for a narrow bezel.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] This application aims to at least partially solve the technical problem of large fluctuations in the width of the sidewall protective film on the cover plate side, which affects the overall frame design and bezel width of the device. To this end, this application provides a display module, a display device, and a manufacturing method.

[0005] This application provides a display module comprising: a functional film layer; a cover plate disposed on the display side of the functional film layer; and a sidewall protective film located on the sidewall of the functional film layer between a positioning film and a positioning film, and covering the sidewall of the functional film layer; wherein the positioning film is disposed on the cover plate and on the same side of the cover plate as the functional film layer, and the positioning film surrounds the sidewall of the functional film layer and is spaced apart from the sidewall of the functional film layer.

[0006] In some embodiments, the positioning film is a separable positioning film or a fixed positioning film.

[0007] In some embodiments, the thickness of the separable positioning film is 20 μm to 100 μm, and the width of the separable positioning film is greater than or equal to 1.0 cm.

[0008] In some embodiments, the side of the separable positioning film away from the functional film layer extends beyond the edge of the cover plate; or, the side of the separable positioning film away from the functional film layer is flush with the edge of the cover plate; or, the side of the separable positioning film away from the functional film layer is recessed relative to the edge of the cover plate.

[0009] In some embodiments, the separable positioning film includes a positioning base film layer and a positioning adhesive film layer stacked together, the positioning adhesive film layer being used to adhere to the cover plate.

[0010] In some embodiments, the material of the positioning base film layer is selected from any one or more of plastics, silicone and foam, and the positioning base film layer is a single layer or a multi-layer structure.

[0011] In some embodiments, the positioning adhesive film layer is an anti-adhesive adhesive film.

[0012] In some embodiments, the positioning film is a printed positioning film or an adhesive positioning film.

[0013] In some embodiments, the thickness of the printed positioning film is greater than or equal to 20 μm; the material of the printed positioning film is selected from any one or more of adhesives, inks, and coatings.

[0014] In some embodiments, the adhesive positioning film includes a first adhesive layer, a buffer base film layer, and a second adhesive layer stacked together. The first adhesive layer is used to adhere to the cover plate, and the second adhesive layer is used to adhere to the middle frame. The thickness of the adhesive positioning film is 0.20 mm to 0.30 mm.

[0015] In some embodiments, the side of the positioning film adjacent to the functional membrane layer is any one or a combination of curved surfaces, planes, and inclined surfaces.

[0016] In some embodiments, the positioning film is provided with a clearance portion, which is used to allow the sidewall protective film to form a clearance opening to avoid the constituent structures of the display module.

[0017] This application also proposes a display device, which includes the above-described display module.

[0018] This application also proposes a method for preparing the above-mentioned display module, the method comprising the following steps: a positioning film setting step, wherein the positioning film is set on one side of the cover plate where the functional film layer is provided; and a sidewall protective film setting step, wherein the protective adhesive is applied to the sidewall of the functional film layer to form the sidewall protective film.

[0019] In some embodiments, when the positioning film is a separable positioning film, after the sidewall protective film setting step, the method further includes a separable positioning film removal step, in which the separable positioning film is peeled off from the cover plate.

[0020] This application also proposes a method for manufacturing the aforementioned display device. When the positioning film is a fixed positioning film, the method for manufacturing the display device includes the following steps: a middle frame setting step, in which the middle frame is attached to the fixed positioning film.

[0021] The embodiments of this application have at least the following beneficial effects:

[0022] The aforementioned display module, by setting a positioning film around the sidewall of the functional film layer on the side of the cover plate adjacent to the functional film layer, with a gap between the positioning film and the sidewall of the functional film layer, allows the positioning film to restrict the self-flowing range of the protective adhesive on the cover plate when protective adhesive is applied to the sidewall of the functional film layer and forms a sidewall protective layer. This restricts the adhesive within the gap between the positioning film and the sidewall of the functional film layer, controlling the morphology of the sidewall protective film and improving its dimensional accuracy. This, to a certain extent, improves the accuracy, stability, and uniformity of the width of the sidewall protective film on the cover plate, reducing dimensional fluctuations in the width of the sidewall protective film on the cover plate. This ensures that the overall frame design and bezel width are not affected by the morphology of the sidewall protective film. Simultaneously, the positioning film also protects the display module, reducing the risk of ink contamination and ink flaking on the cover plate, and also mitigating the risk of damage or breakage of the functional display film layer due to external impacts. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A top view of a display module in the related art is shown;

[0025] Figure 2 It shows Figure 1 A cross-sectional view of the display module in the image;

[0026] Figure 3 A top view of the display module in an embodiment of this application is shown;

[0027] Figure 4 It shows Figure 3 A cross-sectional view of the display module in the image;

[0028] Figure 5 A cross-sectional view of a display module according to another embodiment of this application is shown;

[0029] Figure 6A cross-sectional view of a display module according to yet another embodiment of this application is shown;

[0030] Figure 7 A cross-sectional view of a display module according to yet another embodiment of this application is shown;

[0031] Figure 8 A cross-sectional view of a display module according to yet another embodiment of this application is shown;

[0032] Figure 9 A top view of the separable positioning membrane in an embodiment of this application is shown;

[0033] Figure 10 It shows Figure 9 A cross-sectional view of the separable positioning membrane in the image;

[0034] Figure 11 A top view of the fixing and positioning membrane in an embodiment of this application is shown;

[0035] Figure 12 It shows Figure 11 A cross-sectional view of the fixed positioning membrane in the middle;

[0036] Figure 13 This shows a top view of the method for preparing the display module in an embodiment of this application after the positioning film setting step;

[0037] Figure 14 It shows Figure 13 A cross-sectional view of the display module in the image;

[0038] Figure 15 This is a top view of the sidewall protective film setting step in the method for preparing the display module in an embodiment of this application;

[0039] Figure 16 It shows Figure 15 A cross-sectional view of the display module in the image;

[0040] Figure 17 A top view of the method for preparing the display module in an embodiment of this application is shown during the step of removing the separable positioning membrane.

[0041] Figure 18 It shows Figure 17 A cross-sectional view of the display module in the image;

[0042] Figure 19 This paper shows a top view of the method for preparing the display module in an embodiment of this application after the step of removing the separable positioning membrane;

[0043] Figure 20 It shows Figure 19 A cross-sectional view of the display module.

[0044] Figure label:

[0045] 100. Functional film layer; 110. Optical adhesive layer; 120. Polarizing film; 130. Display panel; 140. Back buffer protective layer; 200. Cover plate; 300. Side wall protective film; 310. Clearance opening; 400. Positioning film; 410. Separable positioning film; 411. Positioning base film layer; 412. Positioning adhesive film layer; 413. Positioning protective layer; 420. Fixed positioning film; 421. Adhesive positioning film; 4211. First adhesive layer; 4212. Buffer base film layer; 4213. Second adhesive layer; 4214. First protective layer; 4215. Second protective layer; 430. Clearance part; 10. Dotted adhesive valve; 20. UV light irradiation. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0047] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0048] This application is described below with reference to the accompanying drawings and specific embodiments:

[0049] Given the sidewall protection requirements from end customers for flexible OLED display modules, a sidewall protective film 300' needs to be sprayed onto the sidewalls of each functional film layer 100' in the display module. In related technologies, such as... Figure 1 and Figure 2As shown, the sidewall protective film 300' is implemented by adding a dispensing process after the final processing step of the display module. Protective adhesive is applied to the sidewalls of each functional film layer 100', forming a sidewall protective film 300'. Because the sidewall protective film 300' has a maximum thickness limit, the protective adhesive needs to have low viscosity and high fluidity. The self-flowing nature of the adhesive allows it to flow along the sidewalls of each functional film layer 100', forming the final shape of the sidewall protective film 300'. However, due to the high fluidity of the adhesive, the width L' of the formed sidewall protective film 300' on the cover plate 200' fluctuates significantly. This not only affects the overall frame design but also requires a large space to be reserved at the edge of the cover plate 200', resulting in a wider overall bezel, which contradicts the end-customer's demand for a narrow bezel.

[0050] In the embodiments of this application, such as Figures 3 to 20 As shown, in order to match the specifications of the sidewall protective film 300 of the display module with the end customer and improve the dimensional accuracy of the sidewall protective film 300, this application embodiment proposes a display module, which includes: a functional film layer 100; a cover plate 200 disposed on the display side of the functional film layer 100; and a sidewall protective film 300, which is located on the sidewall of the functional film layer 100 and between it and a positioning film 400, and the sidewall protective film 300 covers the sidewall of the functional film layer 100; wherein, the positioning film 400 is disposed on the cover plate 200 and is located on the same side of the cover plate 200 as the functional film layer 100, and the positioning film 400 surrounds the sidewall of the functional film layer 100 and is spaced apart from the sidewall of the functional film layer 100.

[0051] The display module proposed in this application embodiment, by providing a positioning film 400 around the sidewall of the functional film layer 100 on the side of the cover plate 200 adjacent to the functional film layer 100, and having a gap between the positioning film 400 and the sidewall of the functional film layer 100, allows the positioning film 400 to limit the self-flow range of the protective adhesive on the cover plate 200 when protective adhesive is applied to the sidewall of the functional film layer 100 to form a sidewall protective layer. This restricts the protective adhesive within the gap between the positioning film 400 and the sidewall of the functional film layer 100, controlling the morphology of the sidewall protective film 300 and improving... The dimensional accuracy of the sidewall protective film 300 improves the accuracy, stability, and uniformity of its width on the cover plate 200, reducing dimensional fluctuations in the width L of the sidewall protective film 300 on the cover plate 200. This allows the overall frame design and bezel width to be unaffected by the shape of the sidewall protective film 300, thus accommodating different frame designs. Simultaneously, the positioning film 400 limits the width L of the sidewall protective film 300 on the cover plate 200 within a certain range, enabling the display module to match more extreme bezel designs and achieving the narrow bezel design requirements of the entire device. Furthermore, the positioning film 400 also protects the display module, reducing the risk of surface contamination such as ink stains on the cover plate 200, reducing the risk of ink peeling, and mitigating the risk of damage or breakage of the functional display film layer due to external impacts.

[0052] In the embodiments of this application, such as Figure 3 and Figure 4 As shown, the display side of the functional film layer 100 is the side of the functional film layer 100 closest to the cover plate 200, and the display content of the display module can be observed from the display side of the functional film layer 100; the sidewall of the functional film layer 100 is the side that surrounds the display side of the functional film layer 100 and is perpendicular to the display side.

[0053] In some embodiments of this application, the functional film layer 100 is a film layer with different functions in the display module. Optionally, such as Figure 4As shown, the functional film layer 100 may include an optical adhesive layer 110, a polarizer 120, a display panel 130, and a back buffer protective layer 140, which are stacked sequentially. The optical adhesive layer 110 is made of optically transparent adhesive, which has high light transmittance to meet the display requirements of the display module; optionally, the optically transparent adhesive may be selected from any one of optically clear adhesive tape (OCA), optically clear resin (OCR), and optically clear film (OCF). The polarizer 120 (POL) is used to modulate at least a portion of the light from the display module to achieve the design purpose; optionally, the polarizer 120 may be a single-layer polarizer 120 structure or a multi-layer polarizer 120 structure with different absorption axes. The display panel 130 (PNL) may be a flexible display panel 130; for example, in some embodiments, the display panel 130 may be a flexible organic light-emitting diode (OLED) display panel 130. The back buffer protective layer 140 can be a superclean foam (SCF) composite film, which is used to buffer the display panel 130 and dissipate the heat generated by the display panel 130 during operation, thus providing a certain degree of protection for the display panel 130.

[0054] In some embodiments of this application, the cover plate 200 can be a rigid cover plate 200, such as a glass cover plate 200 (Cover Glass, CG); the cover plate 200 can also be a flexible cover plate 200, such as ultra-foldable glass (UFG) or ultra-thin glass (UTG). Furthermore, the cover plate 200 can be coated with appropriate surface coatings as needed, for example, the surface of the cover plate 200 can be provided with anti-reflective coatings, reinforcing coatings, or other surface coating structures.

[0055] In some embodiments of this application, before preparing the sidewall protective film 300 of the display module, a positioning film 400 needs to be placed on the side of the cover plate 200 adjacent to the functional film layer 100, so that the positioning film 400 surrounds the sidewall of the functional film layer 100, and there is a certain gap between the positioning film 400 and the functional film layer 100. The width of the gap needs to be set according to the design width of the sidewall protective film 300 on the cover plate 200, and the width of the gap needs to be less than the maximum width of the sidewall protective film 300 on the cover plate 200. The positioning film 400 can "intercept" the protective adhesive to ensure that the adhesive does not flow arbitrarily, thereby confining the protective adhesive within the gap space and preventing the gap space from flowing uncontrollably to the edge of the cover plate 200. In the embodiments of this application, the positioning accuracy of the positioning film 400 determines the dimensional accuracy of the width of the sidewall protective film 300 on the cover plate 200, that is, the dimensional accuracy of the width of the sidewall protective film 300 on the cover plate 200 = the adhesion accuracy of the positioning film 400 + the dimensional accuracy of the positioning film 400. In some embodiments of this application, the dimensional accuracy of the width of the sidewall protective film 300 on the cover plate 200 can reach 0.10mm to 0.15mm. Compared with the completely free flow of the protective adhesive on the cover plate 200, the dimensional fluctuation of the width of the sidewall protective film 300 on the cover plate 200 can be greatly reduced.

[0056] In some embodiments of this application, the protective adhesive of the sidewall protective film 300 can be an optically transparent adhesive with high fluidity, such as optically clear resin (OCR). Furthermore, when the sidewall does not require light transmission, the protective adhesive of the sidewall protective film 300 can be a non-transparent adhesive with high fluidity. For example... Figure 16 As shown, the protective adhesive can be applied by spraying or dotting the optically transparent resin onto the end of the back buffer protective layer 140. The optically transparent resin overflows to the sidewall of the functional film layer 100 through its self-flowing nature. During the self-flowing process of the optically transparent resin, the positioning film 400 can act as a barrier to prevent the optically transparent resin from flowing to the edge of the cover plate 200, thus confining the optically transparent resin within the space between the positioning film 400 and the sidewall of the functional film layer 100. This restricts the width L of the sidewall protective film 300 on the cover plate 200. After the protective adhesive is sprayed or dotted, it can be cured to form the sidewall protective film 300, thereby controlling the dimensional fluctuation of the width L of the sidewall protective film 300 on the cover plate 200 within the allowable range.

[0057] In some embodiments of this application, the cover plate 200 has an ink area on the side adjacent to the functional film layer 100, corresponding to the sidewall position of the functional film layer 100. The ink area can cover the edge area of ​​the functional film layer 100 to prevent light leakage or exposed signal lines in the edge area of ​​the functional film layer 100. In embodiments of this application, the distance between the positioning film 400 and the ink area can be determined according to design requirements.

[0058] As an alternative implementation method, such as Figures 3 to 19 As shown, the positioning film 400 is either a separable positioning film 410 or a fixed positioning film 420.

[0059] In the embodiments of this application, the separable positioning film 410 means that during the manufacturing process of the display module, the separable positioning film 410 can be removed as a process film after the sidewall protective film 300 is prepared, and the final display module no longer contains the separable positioning film 410. The fixed positioning film 420 means that during the manufacturing process of the display module, the fixed positioning film 420 is fixed on the cover plate 200, and the fixed positioning film 420 remains on the cover plate 200 after the sidewall protective film 300 is prepared. The fixed positioning film 420 is a part of the final display module.

[0060] In some embodiments of this application, such as Figures 3 to 19 As shown, the corresponding positioning film 400 type can be selected based on different application requirements. When the separable positioning film 410 is selected, the width L of the side wall protective film 300 on the cover plate 200 can be controlled during the preparation of the side wall protective film 300. The separable positioning film 410 can be removed after the side wall protective film 300 is prepared without affecting the structure of the display module, and thus without affecting the installation of the display device. When selecting the fixed positioning film 420, the width L of the side wall protective film 300 on the cover plate 200 can be controlled during the preparation of the side wall protective film 300. After the side wall protective film 300 is prepared, the fixed positioning film 420 remains on the cover plate 200. The fixed positioning film 420 can be used to replace the middle frame dispensing in the display device as a whole, avoiding the separate middle frame dispensing process, realizing "zero distance" contact between the middle frame and the module, and meeting the sealing and anti-buffering performance requirements of the entire display device. At the same time, after the side wall protective film 300 is prepared, the fixed positioning film 420 remains on the cover plate 200. The fixed positioning film 420 can be used as a protective film to protect the cover plate 200, reducing the risk of surface foreign matter such as ink contamination, reducing the risk of ink peeling off, and reducing the risk of damage and breakage of the functional display film layer caused by external impact.

[0061] In some embodiments of this application, the separable positioning film 410 can be temporarily retained after the sidewall protective film 300 is prepared. At this time, the separable positioning film 410 can serve as a protective film for the cover plate 200, reducing the risk of surface foreign matter such as ink contamination, reducing the risk of ink peeling, and reducing the risk of damage or breakage of the functional display film layer due to external impact. The separable positioning film 410 is then removed from the cover plate 200 when the display module is shipped or transported to downstream processes for the assembly of the display device.

[0062] As an alternative implementation method, such as Figure 9 and Figure 10 As shown, the thickness of the separable positioning film 410 is 20μm to 100μm, and the width of the separable positioning film 410 is greater than or equal to 1.0cm.

[0063] In some embodiments of this application, such as Figure 9 and Figure 10 As shown, by making the thickness of the separable positioning film 410 20μm to 100μm, the purpose of limiting the filling width of the protective adhesive on the cover plate 200 can be effectively achieved. If the thickness of the separable positioning film 410 is less than 20μm, the separable positioning film 410 cannot effectively block the flow of the protective adhesive; if the thickness of the separable positioning film 410 is greater than 100μm, the excessive thickness of the separable positioning film 410 will increase costs, and may also interfere with the spraying or self-flowing of the protective adhesive due to excessive thickness. The thickness of the separable positioning film 410 can be any thickness between 20μm and 100μm. For example, the thickness of the positioning film 400 can be 20μm, 25μm, 30μm, 36μm, 40μm, 43μm, 50μm, 55μm, 60μm, 70μm, 75μm, 80μm, 84μm, 90μm, 96μm, 100μm, etc.

[0064] In some embodiments of this application, such as Figure 4 As shown, the thickness of the separable positioning film 410 can be less than the thickness of the functional film layer 100. The separable positioning film 410 is disposed on the cover plate 200 and located at the bottom of the side wall protective film 300, which can also achieve the purpose of limiting the width L of the side wall protective film 300 on the cover plate 200.

[0065] In other embodiments of this application, such as Figures 5 to 8 As shown, the thickness of the separable positioning membrane 410 can be the same as or greater than the thickness of the functional membrane layer 100, thereby limiting the shape of the top of the sidewall protective membrane 300 and preventing the sidewall protective membrane 300 from overflowing from above the separable positioning membrane 410.

[0066] In some embodiments of this application, such as Figures 9 to 10 As shown, by making the width of the separable positioning film 410 greater than or equal to 1.0 cm, it is easier to position and attach the separable positioning film 410 on the cover plate 200. If the width of the separable positioning film 410 is too small, the positioning accuracy of the separable positioning film 410 on the cover plate 200 will be poor, and attachment will be more difficult. Optionally, the width of the separable positioning film 410 can be any width between 1.0 cm and 3.0 cm. For example, the width of the positioning film 400 can be 1.0 cm, 1.1 cm, 1.2 cm, 1.3 cm, 1.4 cm, 1.5 cm, 1.6 cm, 1.7 cm, 1.8 cm, 1.9 cm, 2.0 cm, 2.1 cm, 2.2 cm, 2.3 cm, 2.4 cm, 2.5 cm, 2.6 cm, 2.7 cm, 2.8 cm, 2.9 cm, 3.0 cm, etc.

[0067] As an alternative implementation method, such as Figure 9 and Figure 10 As shown, the side of the separable positioning film 410 away from the functional film layer 100 extends beyond the edge of the cover plate 200, or the side of the separable positioning film 410 away from the functional film layer 100 is flush with the edge of the cover plate 200; or the side of the separable positioning film 410 away from the functional film layer 100 is recessed relative to the edge of the cover plate 200.

[0068] In some embodiments of this application, the relative position of the side of the separable positioning membrane 410 away from the functional membrane layer 100 and the edge of the cover plate 200 can be determined according to design requirements.

[0069] Optionally, the side of the separable positioning film 410 away from the functional film layer 100 extends beyond the edge of the cover plate 200. The portion of the separable positioning film 410 extending beyond the edge of the cover plate 200 can serve as a handle for the separable positioning film 410, facilitating its later removal.

[0070] Optionally, such as Figure 9 and Figure 10 As shown, the side of the separable positioning film 410 away from the functional film layer 100 is flush with the edge of the cover plate 200. When the separable positioning film 410 is positioned and attached, the edge of the cover plate 200 can be used as a reference for positioning and attachment, which helps to improve the attachment accuracy of the separable positioning film 410, and thus improves the dimensional accuracy of the width of the sidewall protective film 300 on the cover plate 200.

[0071] Alternatively, the side of the separable positioning membrane 410 away from the functional membrane layer 100 may also be recessed relative to the edge of the cover plate 200.

[0072] As an alternative implementation method, such as Figure 9 and Figure 10As shown, the separable positioning film 410 includes a positioning base film layer 411 and a positioning adhesive film layer 412 stacked together, and the positioning adhesive film layer 412 is used to be pasted onto the cover plate 200.

[0073] In some embodiments of this application, such as Figure 9 and Figure 10 As shown, the separable positioning film 410 may include a positioning base film layer 411 and a positioning adhesive film layer 412 stacked together, wherein the positioning adhesive film layer 412 is used to be pasted on the cover plate 200, and the positioning base film layer 411 is used to meet the thickness and hardness requirements of the separable positioning film 410.

[0074] In some embodiments of this application, the positioning base film layer 411 can be formed by processes such as die-cutting, laser cutting, and injection molding, and then bonded to the positioning adhesive film layer 412 to form a separable positioning film 410 with an integral structure.

[0075] In some embodiments of this application, such as Figure 9 and Figure 10 As shown, the incoming material structure of the separable positioning film 410 may also include a positioning protective layer 413 stacked on the positioning adhesive film layer 412. The positioning protective layer 413 is used to protect the positioning adhesive film layer 412 and prevent contamination of the positioning adhesive film layer 412. When the separable positioning film 410 is positioned and attached to the cover plate 200, the positioning protective layer 413 is removed from the positioning adhesive film layer 412.

[0076] As an alternative implementation method, such as Figure 9 and Figure 10 As shown, the material of the positioning base film layer 411 is selected from any one or more of plastic, silicone and foam, and the positioning base film layer 411 is a single layer or a multi-layer structure.

[0077] In some embodiments of the application, such as Figure 9 and Figure 10 As shown, the material of the positioning base film layer 411 includes, but is not limited to, any one or more of plastic, silicone, and foam. Optionally, the positioning base film layer 411 has a certain degree of hardness to facilitate positioning and attachment. Optionally, the positioning base film layer 411 can be a single-layer structure or a multi-layer structure. The positioning base film layer 411 can achieve the thickness requirement of the separable positioning film 410 through a single-layer structure; the positioning base film layer 411 can also achieve the thickness requirement of the separable positioning film 410 through a multi-layer structure.

[0078] As an alternative implementation method, such as Figure 9 and Figure 10 As shown, the positioning adhesive film layer 412 is an adhesive film that can reduce tack.

[0079] In some embodiments of this application, such as Figure 9 and Figure 10As shown, the positioning adhesive film layer 412 is a non-adhesive adhesive film. For example, the positioning adhesive film layer 412 can be de-adhesive or de-adhesive by means of UV light 20, heating, etc., so as to reduce the bonding strength between the positioning adhesive film layer 412 and the cover plate 200, thereby making it easier to separate the separable positioning film 410 from the cover plate 200.

[0080] In some embodiments, the separable positioning film 410 may be provided with an easy-tear sticker, so that the separable positioning film 410 can be separated from the cover plate 200 by the easy-tear sticker.

[0081] As an alternative implementation, the positioning film 420 is either a printed positioning film 400 or an adhesive positioning film 430.

[0082] In some embodiments of this application, the fixing and positioning film 420 is used to fix it to the cover plate 200 and remains on the cover plate 200 after the sidewall protective film 300 is prepared. The fixing and positioning film 420 can be fixed to the cover plate 200 in different ways.

[0083] For example, the positioning film 420 can be a printed positioning film 400, printed on the cover plate 200 by means of screen printing or other methods, and located on the same side of the cover plate 200 as the functional film layer 100. After the printed positioning film 400 is formed on the cover plate 200, the protective adhesive of the side wall protective film 300 is sprayed. The printed positioning film 400 can limit the self-flow range of the protective adhesive, thereby limiting the width L of the formed side wall protective film 300 on the cover plate 200. At the same time, the printed positioning film 400 can also serve as a protective film to protect the cover plate 200, reducing the risk of surface foreign matter such as ink contamination, reducing the risk of ink falling off and light leakage, and reducing the risk of damage or breakage of the functional display film layer caused by external impact.

[0084] For example, such as Figure 11 and Figure 12 As shown, the fixed positioning film 420 can be an adhesive positioning film 430, which is fixed to the cover plate 200 by adhesive and located on the same side of the cover plate 200 as the functional film layer 100. After the adhesive positioning film 430 is adhered to the cover plate 200, the protective adhesive of the side wall protective film 300 is sprayed. The adhesive positioning film 430 can limit the self-flow range of the protective adhesive, thereby limiting the width L of the formed side wall protective film 300 on the cover plate 200. At the same time, the adhesive positioning film 430 can also serve as a protective film to protect the cover plate 200, reducing the risk of surface foreign matter such as ink contamination, reducing the risk of ink shedding and light leakage, and reducing the risk of damage or breakage of the functional display film layer caused by external impact.

[0085] As an optional implementation, the thickness of the printed positioning film 400 is greater than or equal to 20 μm; the material of the printed positioning film 400 is selected from any one or more of adhesives, inks and coatings.

[0086] In some embodiments of this application, the thickness of the printed positioning film 400 can be greater than or equal to 20 μm. When the thickness of the printed positioning film 400 is greater than 20 μm, it can effectively block the protective adhesive forming the sidewall protective film 300 from flowing to the edge of the cover plate 200. If the thickness of the printed positioning film 400 is less than 20 μm, the blocking effect of the printed positioning film 400 on the protective adhesive is poor.

[0087] In some embodiments of this application, the thickness of the printed positioning film 400 can be 20 μm to 100 μm; optionally, the thickness of the printed positioning film 400 can be 20 μm to 60 μm. For example, the thickness of the printed positioning film 400 can be any thickness between 20 μm and 100 μm, such as 20 μm, 25 μm, 30 μm, 36 μm, 40 μm, 43 μm, 50 μm, 55 μm, 60 μm, 70 μm, 75 μm, 80 μm, 84 μm, 90 μm, 96 μm, 100 μm, etc.

[0088] In some embodiments of this application, the material for printing the positioning film 400 can be any one or more of adhesives, inks, and coatings. These materials are applied to the cover plate 200 via screen printing or coating. It should be noted that the fluidity of the material used to print the positioning film 400 must be less than the fluidity of the protective adhesive forming the sidewall protective film 300. This ensures that the positional accuracy of the printing positioning film 400 on the cover plate 200 is higher than the dimensional accuracy of the width of the sidewall protective film 300 on the cover plate 200. Therefore, printing the positioning film 400 can improve the dimensional accuracy of the width of the sidewall protective film 300 on the cover plate 200.

[0089] In some embodiments of this application, the cover plate 200 has an ink area on the side adjacent to the functional film layer 100, corresponding to the sidewall position of the functional film layer 100. The ink area can cover the edge area of ​​the functional film layer 100 to prevent light leakage or exposed signal lines at the edge area of ​​the functional film layer 100. In embodiments of this application, the printing positioning film 400 can be printed on a portion of the ink area of ​​the cover plate 200, or it can be at a certain distance from the ink area of ​​the cover plate 200. This allows for a certain gap between the printing positioning film 400 and the sidewall of the functional film layer 100, as well as a certain gap between the printing positioning film 400 and the ink area of ​​the cover plate 200. The distance between the printing positioning film 400 and the ink area can be determined according to design requirements.

[0090] In some embodiments of this application, when the material of the printed positioning film 400 is ink, the printed positioning film 400 can also replace part of the ink area on the cover plate 200.

[0091] In some embodiments of this application, the width of the printed positioning film 400 on the cover plate 200 is not limited. Therefore, the printed positioning film 400 can be adapted to the design requirements of narrow frame and ultra-narrow frame cover plates 200. At the same time, the width of the printed positioning film 400 on the cover plate 200 can be adjusted according to the width of the middle frame and the distance between the side wall protective film 300 and the edge of the cover plate 200.

[0092] As an alternative implementation method, such as Figure 11 and Figure 12 As shown, the adhesive positioning film 430 includes a first adhesive layer 4211, a buffer base film layer 4212, and a second adhesive layer 4213 stacked together. The first adhesive layer 4211 is used to be adhered to the cover plate 200, and the second adhesive layer 4213 is used to be adhered to the middle frame. The thickness of the adhesive positioning film 430 is 0.20mm to 0.30mm.

[0093] In some embodiments of this application, such as Figure 11 and Figure 12 As shown, the adhesive positioning film 430 includes a first adhesive layer 4211, a buffer base film layer 4212, and a second adhesive layer 4213 stacked together.

[0094] The first adhesive layer 4211 is used to adhere to the cover plate 200, thereby allowing the adhesive positioning film 430 to be adhered to the cover plate 200 as a whole. A certain gap space is reserved between the adhesive positioning film 430 and the side wall of the functional film layer 100. The protective adhesive used to form the side wall protective film 300 flows freely within this gap space, forming the side wall protective film 300 by self-flowing. The adhesive positioning film 430 can limit the flow range of the protective adhesive, thereby confining the side wall protective film 300 within the gap space between the adhesive positioning film 430 and the side wall of the functional film layer 100. This prevents the protective adhesive from flowing too far towards the edge of the cover plate 200, thereby improving the dimensional accuracy of the width of the side wall protective adhesive on the cover plate 200.

[0095] The second adhesive layer 4213 is used to adhere to the middle frame, so that when assembling the display module with the middle frame of the whole machine, the aforementioned adhesive positioning film 430 can be used as a middle frame fixing adhesive to fix the middle frame, giving the adhesive positioning film 430 a "dual-purpose" effect: on the one hand, it is used to limit the side wall protective adhesive; on the other hand, it is used to adhere and fix the middle frame. From another perspective, the adhesive positioning film 430 can also be regarded as the middle frame fixing adhesive being pre-positioned on the cover plate 200 around the side wall of the functional film layer 100 and spaced apart from the side wall of the functional film layer 100.

[0096] In some embodiments of this application, such as Figure 11 and Figure 12As shown, the thickness of the adhesive positioning film 430 can be 0.20mm to 0.30mm. Within this range, the thickness of the adhesive positioning film 430 effectively prevents the protective adhesive forming the sidewall protective film 300 from flowing towards the edge of the cover plate 200. Furthermore, when the adhesive positioning film 430 is adhered and fixed to the middle frame, it allows for zero-distance contact between the display module and the middle frame, meeting the design requirements for overall sealing and impact resistance. Optionally, the thickness of the adhesive positioning film 430 can be any thickness between 0.20mm and 0.30mm, for example, 0.20mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm, 0.30mm, etc.

[0097] In some embodiments of this application, such as Figure 11 and Figure 12 As shown, the incoming material structure of the adhesive positioning film 430 may further include a first protective layer 4214 stacked on the first adhesive layer 4211 and a second protective layer 4215 stacked on the second adhesive layer 4213. The first protective layer 4214 is used to protect the first adhesive layer 4211, and the second protective layer 4215 is used to protect the second adhesive layer 4213, avoiding contamination of the first adhesive layer 4211 and the second adhesive layer 4213. When the adhesive positioning film 430 is adhered to the cover plate 200 through the first adhesive layer 4211, the first protective layer 4214 is removed from the first adhesive layer 4211; when the adhesive positioning film 430 is adhered to the cover plate 200 through the second adhesive layer 4213, the second protective layer 4215 is removed from the second adhesive layer 4213.

[0098] As an alternative implementation method, such as Figures 5 to 8 As shown, the side of the positioning membrane 400 adjacent to the functional membrane layer 100 is any one or a combination of curved surfaces, planes, and inclined surfaces.

[0099] In some embodiments of this application, the side of the positioning film 400 adjacent to the functional film layer 100 can be specially shaped to achieve a special sidewall protective film 300 morphology. For example... Figures 5 to 8 As shown, by making the side of the positioning film 400 adjacent to the functional film layer 100 an arc-shaped surface, a plane, or a combination of slopes, the cross-sectional shape of the sidewall protective film 300 can be rectangular, trapezoidal, fan-shaped, or a combination of trapezoids and rectangles. Compared to when the cross-sectional shape of the sidewall protective film 300 is rectangular, when the cross-sectional shape of the sidewall protective film 300 is trapezoidal, fan-shaped, or a combination of trapezoids and rectangles, the space above the cover plate 200 can be saved, allowing for more design space during assembly to meet different assembly requirements.

[0100] In some embodiments of the application, such as Figures 5 to 8 As shown, the positioning base film layer 411 can also form different side structures through a multi-layer structure, so that the side of the separable positioning film 410 adjacent to the functional film layer 100 is any one or a combination of curved surfaces, planes, and slopes. Different side structures give the sidewall protective film 300 different shapes. Similarly, the adhesive positioning film 430 can also form different side structures through a multi-layer structure, so that the side of the adhesive positioning film 430 adjacent to the functional film layer 100 is any one or a combination of curved surfaces, planes, and slopes. Different side structures give the sidewall protective film 300 different shapes. Compared with the related art's solution of forming a special morphology through injection molding, the solution of forming a special morphology of the sidewall protective film 300 through the positioning film 400 in this application can effectively improve processing efficiency and simplify the process implementation method.

[0101] As an alternative implementation method, such as Figures 13 to 20 As shown, the positioning film 400 is provided with a clearance portion 430, which is used to make the side wall protective film 300 form a clearance opening 310 to avoid the component structure of the display module.

[0102] In some embodiments of this application, such as Figures 13 to 20 As shown, the positioning film 400 can be a complete ring structure surrounding the sidewall of the functional film layer 100; simultaneously, avoidance portions 430 can be provided at some positions of the positioning film 400 as needed, forming avoidance openings 310 on the sidewall protective film 300 through the avoidance portions 430. The avoidance openings 310 are used to avoid some components of the display module, such as the bonding structure and wiring structure of the flexible display panel 130 of the display module. The position and size of the avoidance portions 430 can be determined according to the position and size of the components of the display module. Figures 13 to 20 As shown, a clearance portion 430 is provided on the positioning film 400 at the top position of the functional module. Due to the presence of the clearance portion 430, the protective adhesive of the side wall protective film 300 cannot flow to this location, thereby forming a clearance opening 310 corresponding to the clearance portion 430.

[0103] Based on the same inventive concept, this application also proposes a display device, which includes the above-mentioned display module.

[0104] Since the display device provided by the present invention includes the display module of the above-mentioned technical solution, the display device provided by the present invention has all the beneficial effects of the above-mentioned display module, which will not be elaborated here.

[0105] Based on the same inventive concept, this application also proposes a method for manufacturing the above-mentioned display module, such as... Figures 13 to 20As shown, the method for manufacturing the display module includes the following steps:

[0106] The positioning film 400 is installed on the side of the cover plate 200 where the functional film layer 100 is located; and,

[0107] The sidewall protective film 300 is set by applying protective adhesive to the sidewall of the functional membrane layer 100 to form the sidewall protective film 300.

[0108] The method for preparing the display module proposed in this application first places a positioning film 400 on a cover plate 200, and then applies protective adhesive to the sidewall of the functional film layer 100. When the protective adhesive forms a sidewall protective layer by self-flowing, the positioning film 400 can limit the self-flow range of the protective adhesive on the cover plate 200, confining the protective adhesive within the space between the positioning film 400 and the sidewall of the functional film layer 100, controlling the morphology of the sidewall protective film 300, improving the dimensional accuracy of the sidewall protective film 300, and to a certain extent improving the accuracy, stability and uniformity of the width of the sidewall protective film 300 on the cover plate 200, reducing the dimensional fluctuation of the width L of the sidewall protective film 300 on the cover plate 200, so that the design of the middle frame and the width of the frame of the whole machine are not affected by the morphology of the sidewall protective film 300.

[0109] In some embodiments of this application, during the positioning film 400 setting step, the positioning film 400 can be positioned by the side of the positioning film 400 and the edge of the display panel 130, so as to reduce the influence of the positioning tolerance and dimensional tolerance of the positioning film 400 and further improve the dimensional accuracy of the sidewall protective film 300.

[0110] In some embodiments of this application, during the sidewall protective film 300 setting step, the dispensing valve 10 dispenses adhesive along the sidewall of the functional film layer 100 according to the required path. After the protective adhesive self-flows and is cured, a sidewall protective film 300 can be formed that adheres to the sidewall of the functional film layer 100.

[0111] As an alternative implementation method, such as Figures 17 to 20 As shown, when the positioning film 400 is a separable positioning film 410, after the sidewall protective film 300 setting step, the following steps are also included:

[0112] The separable positioning film 410 removal step involves peeling the separable positioning film 410 off the cover plate 200.

[0113] In some embodiments of this application, when the positioning film 400 is a separable positioning film 410, the separable positioning film 410 can be removed from the cover plate 200 after the sidewall protective film 300 is set. For example, the separable positioning film 410 can be removed immediately after the sidewall protective film 300 is set. Alternatively, the separable positioning film 410 can be removed during the assembly of the complete machine after the display module is shipped. During the time period between the shipment of the display module and the assembly of the complete machine, the separable positioning film 410 can serve as a protective film to protect the cover plate 200, reducing the risk of surface foreign matter such as ink contamination on the cover plate 200, reducing the risk of ink peeling, and reducing the risk of damage or breakage of the functional display film layer due to external impact.

[0114] In some embodiments of this application, such as Figure 17 and Figure 18 As shown, the positioning adhesive film layer 412 can be a non-adhesive adhesive film. Therefore, in the step of removing the separable positioning film 410, the positioning adhesive film layer 412 can be de-adhesive or de-adhesive by means of UV light irradiation 20, heating, etc., so as to reduce the bonding strength between the positioning adhesive film layer 412 and the cover plate 200, thereby making it easier to separate the separable positioning film 410 from the cover plate 200.

[0115] Based on the same inventive concept, this application also proposes a method for manufacturing the above-mentioned display device. When the positioning film 400 is a fixed positioning film 420, the method for manufacturing the display device includes the following steps:

[0116] The middle frame setup steps involve attaching the middle frame to the fixing and positioning film 420.

[0117] In some embodiments of this application, when the positioning film 400 is a fixed positioning film 420, the fixed positioning film 420 can also be used as a middle frame fixing adhesive to fix the middle frame. Therefore, during the manufacturing process of the display device, the middle frame can be attached to the fixed positioning film 420 to fix the middle frame through the fixed positioning film 420.

[0118] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0119] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0120] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0121] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0122] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A display module, characterized in that, The display module includes: Functional membranes; A cover plate, the cover plate being disposed on the display side of the functional film layer; and, A sidewall protective film is located between the sidewall of the functional membrane layer and the positioning film, and the sidewall protective film covers the sidewall of the functional membrane layer. The positioning film is disposed on the cover plate and is located on the same side of the cover plate as the functional film layer. The positioning film surrounds the side wall of the functional film layer and is spaced apart from the side wall of the functional film layer. The positioning film does not overlap with the functional film layer, and the positioning film is a separable positioning film or a fixed positioning film.

2. The display module as described in claim 1, characterized in that, The thickness of the separable positioning membrane is 20 μm to 100 μm, and the width of the separable positioning membrane is greater than or equal to 1.0 cm.

3. The display module as described in claim 1, characterized in that, The separable positioning film extends beyond the edge of the cover plate on the side away from the functional film layer; or, the side of the separable positioning film away from the functional film layer is flush with the edge of the cover plate; or, the side of the separable positioning film away from the functional film layer is recessed relative to the edge of the cover plate.

4. The display module as described in claim 1, characterized in that, The separable positioning film includes a positioning base film layer and a positioning adhesive film layer stacked together, the positioning adhesive film layer being used to adhere to the cover plate.

5. The display module as described in claim 4, characterized in that, The material of the positioning base film layer is selected from any one or more of plastics, silicone and foam, and the positioning base film layer is a single layer or a multi-layer structure.

6. The display module as described in claim 4, characterized in that, The positioning adhesive film layer is a non-sticky adhesive film.

7. The display module as described in claim 1, characterized in that, The positioning film is either a printed positioning film or an adhesive positioning film.

8. The display module as described in claim 7, characterized in that, The thickness of the printed positioning film is greater than or equal to 20 μm; the material of the printed positioning film is selected from any one or more of adhesives, inks and coatings.

9. The display module as described in claim 7, characterized in that, The adhesive positioning film includes a first adhesive layer, a buffer base film layer, and a second adhesive layer stacked together. The first adhesive layer is used to adhere to the cover plate, and the second adhesive layer is used to adhere to the middle frame. The thickness of the adhesive positioning film is 0.20 mm to 0.30 mm.

10. The display module as described in any one of claims 1 to 9, characterized in that, The side of the positioning membrane adjacent to the functional membrane layer is any one or a combination of curved surfaces, planes, and inclined surfaces.

11. The display module as described in any one of claims 1 to 9, characterized in that, The positioning film is provided with a clearance portion, which is used to make the side wall protective film form a clearance opening to avoid the component structure of the display module.

12. A display device, characterized in that, The display device includes the display module as described in any one of claims 1 to 11.

13. A method for manufacturing a display module as described in any one of claims 1 to 11, characterized in that, The method for manufacturing the display module includes the following steps: The positioning film setting step involves setting the positioning film on the side of the cover plate where the functional film layer is located; and, The sidewall protective film installation step involves applying protective adhesive to the sidewall of the functional membrane layer to form the sidewall protective film.

14. The method for preparing the display module as described in claim 13, characterized in that, When the positioning film is a separable positioning film, after the sidewall protective film setting step, Includes the following steps, The separable positioning film removal step involves peeling the separable positioning film off the cover plate.

15. A method for manufacturing a display device as described in claim 12, characterized in that, When the positioning film is a fixed positioning film, the method for manufacturing the display device includes the following steps: The middle frame setting step involves attaching the middle frame to the fixing and positioning film.

Images