A protective film, a display module, and a display device.

Abstract

This application discloses a protective film, a display module, and a display device, belonging to the field of display technology. It ensures that the protective film adheres smoothly to the cover plate body, reducing the generation of air bubbles. The protective film is applied to a cover plate body with a spherical curved convex surface. When the protective film is in a curved state, its curved shape matches the curved shape of the convex surface of the cover plate body. When the protective film is in a planar state, it has at least one adjustment part for adjusting the curved shape of the protective film to match the curved shape of the convex surface of the cover plate body.

Description

Technical Field

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

[0002] Currently, spherical curved surface CG (Cover Glass) is widely used in smart wearable products. Spherical curved surface CG can enhance the appearance design of smart wearable products.

[0003] However, due to the spherical surface of the CG structure, the overall thickness of the CG is uneven, making it impossible for the protective film to adhere smoothly to the CG surface. When the protective film is applied to the CG surface, air bubbles are easily formed. In subsequent manufacturing processes, a suction nozzle is needed to pick up the CG surface after the protective film has been applied. If the nozzle picks up air bubbles in the protective film, the entire display module may fall off, causing damage and affecting the yield rate. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a protective film, a display module, and a display device that can ensure the protective film adheres smoothly to the cover plate body and reduce the generation of air bubbles.

[0005] A first aspect of this application provides a protective film applied to a cover plate body having a spherical curved convex surface. The protective film has a planar state and a curved state, and the protective film changes from a planar state to a curved state during the process of being attached to the convex surface of the cover plate body.

[0006] When the protective film is in a curved state, the curved shape of the protective film is adapted to the curved shape of the convex surface of the cover plate body;

[0007] When the protective film is in a planar state, the protective film has at least one adjustment part, which is used to adjust the curved shape of the protective film when the protective film is transformed from a planar state to a curved state, so that the curved shape of the protective film is adapted to the curved shape of the convex surface of the cover plate body.

[0008] In some embodiments, at least two of the adjustment parts are arranged in a circular array on the protective film with the central axis of the protective film as the array axis.

[0009] In some embodiments, the adjustment part has a central through hole and an adhesive through hole, wherein the central through hole is a cylindrical hole and the adhesive through hole is a fan-shaped hole;

[0010] The central axis of the central through hole coincides with the central axis of the protective film, the adhesive through hole has a first symmetry plane in the thickness direction of the protective film, and the central axis of the central through hole is located within the first symmetry plane.

[0011] In some embodiments, the central through hole has a bottom diameter R, wherein 1 mm ≤ R ≤ 2 mm.

[0012] In some embodiments, the adhesive through-hole has a central angle β, wherein 2°≤β≤4°.

[0013] In some embodiments, the cover plate further includes a tearing tool extending from the protective film, the tearing tool having a second plane of symmetry in the thickness direction of the protective film, the second plane of symmetry having an angle α with the first plane of symmetry, wherein 30°≤α≤180°.

[0014] In some embodiments, the tearing assembly includes a connecting portion connected to the protective film and a clamping portion connected to the connecting portion for clamping the protective film.

[0015] In some embodiments, the tearing hand assembly further includes a deformable portion located between the connecting portion and the clamping portion, the deformable portion being extensible to allow for changes in the distance between the connecting portion and the clamping portion.

[0016] In some embodiments, the projection of the deformable portion onto the horizontal plane is Z-shaped.

[0017] A second aspect of this application provides a display module, including a cover plate body and a display panel, and a protective film as described in the first aspect, wherein the protective film is attached to the convex surface of the cover plate body, and the cover plate body is located on the light-emitting side of the display panel.

[0018] A third aspect of this application provides a display device, including a display module as described in the second aspect.

[0019] This application provides an adjustment part on the protective film. During the process of the protective film being attached to the cover plate body, that is, during the process of the protective film changing from a planar state to a curved state, the curved shape of the protective film can be adjusted based on the adjustment part so that the curved shape of the protective film matches the curved shape of the convex surface of the cover plate body, thereby reducing the generation of air bubbles. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1This is a schematic diagram of the process of the protective film being applied to the convex surface of the cover plate body;

[0022] Figure 2 It is a schematic cross-sectional view after the protective film and the cover plate body are attached;

[0023] Figure 3 This is a schematic top view of a protective film in related technologies;

[0024] Figure 4 This is a schematic top view illustrating the uneven adhesion between the protective film and the cover plate body in related technologies.

[0025] Figure 5 This is a schematic top view of a cover plate provided in an embodiment of this application;

[0026] Figure 6 This is a schematic top view of a protective film provided in an embodiment of this application;

[0027] Figure 7 yes Figure 6 Schematic sectional view of AA in the diagram;

[0028] Figure 8 This is a schematic diagram illustrating the principle of the protective film being adhered to the cover plate body according to an embodiment of this application;

[0029] Figure 9 This is a schematic top view of yet another protective film provided in an embodiment of this application;

[0030] Figure 10 This is a schematic top view of another cover plate provided in the embodiments of this application;

[0031] Figure 11 This is a schematic diagram illustrating another method of applying a protective film to a cover plate body, as provided in an embodiment of this application.

[0032] Figure 12 This is a schematic top view of another cover plate provided in the embodiments of this application;

[0033] Figure 13 This is a schematic diagram illustrating another method of applying a protective film to a cover plate body, as provided in an embodiment of this application.

[0034] Figure 14 This is a schematic top view of another cover plate provided in the embodiments of this application;

[0035] Figure 15 This is a schematic top view of yet another protective film provided in an embodiment of this application;

[0036] Figure 16 This is a schematic top view of yet another protective film provided in an embodiment of this application;

[0037] Figure 17 This is a schematic top view of another protective film provided in the embodiments of this application. Detailed Implementation

[0038] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0039] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the requirement defined by the phrase "comprising one..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0040] The CG surface of smart wearable products has an AF (Anti-Finger) film. Scratches to the AF film can easily reduce its anti-fingerprint performance. The CG surface also has a reinforcement layer to reduce damage from impacts and scratches. Therefore, a protective film is needed to cover the CG surface, forming a physical protective layer that effectively protects against damage to the AF film and reinforcement layer. When the CG surface uses a spherical curved structure, the overall thickness of the CG is uneven, making it impossible for the protective film to adhere smoothly to the CG surface.

[0041] In related technologies, when the protective film 2 is applied to the CG surface, air bubbles are easily generated on the CG surface. In subsequent processes, if the nozzle adheres to the air bubbles, the entire display module may fall off, causing damage to the display module and affecting the product yield.

[0042] See Figure 1 The diagram illustrates the process of attaching the protective film 2 to the convex surface of the cover body 100. The prepared protective film 200 is placed above the convex surface of the cover body 100. After the position is determined, the protective film 2 is moved in the moving direction 10 toward the convex surface of the cover body 100, and an appropriate tool, such as a scraper or roller, is used to attach the protective film 2 to the surface of the cover body 100. Figure 2 This is a schematic cross-sectional view showing the protective film 2 after it has been attached to the cover plate body 100.

[0043] See Figure 3 The diagram shows a schematic top view of a protective film in the related art. Figure 3 The protective film 2 is planar and cylindrical. (See also...) Figure 4 This diagram illustrates an uneven bonding between the protective film 2 and the cover plate body 100 in the related art. During the bonding process, because the cover plate body 100 has a spherical curved surface structure, uneven bonding can easily occur on the surface of the cover plate body 100. Figure 4 As shown in bubble 3. In subsequent processes, if the nozzle adheres to bubble 3, it can easily cause the protective film 2 to separate from the cover plate body 100. This results in the protective film 2 separating from the entire display module, causing the entire display module to fall off, thereby damaging the display module and affecting its yield rate.

[0044] In view of this, the present application provides a protective film, a display module, and a display device, which can ensure that the protective film 200 is flatly attached to the cover plate body 100, reduce the generation of air bubbles, avoid the display module falling off and being damaged due to the suction nozzle adsorbing on the air bubbles, and improve the yield of the display module.

[0045] In a first aspect, embodiments of this application provide a protective film, Figure 5 A schematic top view of a cover plate provided for an embodiment of this application is shown below. Figure 5 As shown, the cover plate body 100 has a spherical curved surface structure.

[0046] It should be noted that the cover body 100 of the smart wearable device is usually made of glass. However, the material of the cover body 100 in this embodiment is not limited to glass. It can also be made of plastic, wood, etc.

[0047] Figure 6 A schematic top view of the protective film 200 provided in the embodiments of this application in a planar state.

[0048] In the embodiments of this application, the protective film 200 includes both planar and curved states. For example... Figure 6 As shown, before the protective film 200 is attached to the cover plate body 100, the protective film 200 is in a flat state. Figure 1As shown, the protective film 200 is placed above the convex surface of the cover plate body 100. After positioning, the protective film 200 is moved in the moving direction 10 towards the convex surface of the cover plate body 100, and an appropriate tool such as a scraper or roller is used to attach the protective film 200 to the surface of the cover plate body 100. After the protective film 200 is attached to the cover plate body 100, the protective film 200 is in a curved state. That is, the protective film 200 changes from a planar state to a curved state during the process of attaching to the convex surface of the cover plate body 100.

[0049] The protective film application process includes surface treatment, cutting the protective film, film application, bubble removal, and curing the protective film. In this embodiment, the protective film 200 can be applied to the convex surface of the cover plate body 100 using an application process from related technologies. This embodiment does not limit the specific application process.

[0050] In this embodiment, when the protective film 200 is in a planar state, the protective film 200 has at least one adjustment part 300. The adjustment part 300 is used to adjust the curved shape of the protective film 200 when the protective film 200 changes from a planar state to a curved state, so that the curved shape of the protective film 200 matches the curved shape of the convex surface of the cover plate body 100. That is to say, the adjustment part can make the protective film 200 fit more closely to the convex surface of the cover plate body 100, thereby reducing the generation of air bubbles between the protective film 200 and the cover plate body 100.

[0051] The adjustment part 300 of the protective film 200 includes various different forms, such as Figure 6 As shown, the protective film 200 is cylindrical, and the adjustment part 300 includes a central through hole 301 and an adhesive through hole 302. The central through hole 301 is a cylindrical through hole. Figure 7 for Figure 6 A cross-sectional view of the protective film 200 (AA section). Figure 6 As shown, the central through hole 301 has a central axis 3011, and the protective film 200 has a central axis (not shown in the figure), wherein the central axis 3011 of the central through hole 301 coincides with the central axis of the protective film 200.

[0052] See also Figure 6 and Figure 7 The adjustment part 300 also includes an adhesive through hole 302, which is a fan-shaped body hole. The adhesive through hole 302 has a first symmetry plane 3021 in the thickness direction of the protective film 200. The central axis 3011 of the central through hole 301 is located within the first symmetry plane 3021. That is, the central through hole 301 and the adhesive through hole 302 are not only connected together, but also share a central axis.

[0053] Figure 8 for Figure 6 The diagram shows the bonding principle when the protective film 200 is adhered to the cover plate body 100. Figure 8 As shown, when the protective film 200 is attached to the convex surface of the cover plate body 100, the two sides of the fan-shaped body of the adhesive through hole 302 approach each other in the first direction 20 and the second direction 30 respectively, until the two sides are completely attached together, resulting in the following: Figure 5 The cover plate shown.

[0054] It should be noted that, Figure 5 The cover plate shown includes dashed lines. These dashed lines are not actual lines, but rather represent the positions where the two sides of the fan-shaped part of the adhesive through-hole 302 approach each other to their contact point. It can be seen that the protective film 200 adheres to the cover plate body 100, and after the curved surface shape is adjusted by the adjustment part 300, the adjustment part 300 disappears.

[0055] Figure 5 The cover plate shown includes a cover plate body 100 and a protective film 200. With the adhesive through-hole 302, the protective film 200 ensures complete coverage of the convex surface of the cover plate body 100, thereby reducing the generation of air bubbles on the surface of the cover plate body 100. Furthermore, the central through-hole 301 prevents tearing at the connection edge between the adhesive through-hole 302 and the central through-hole 301, enhancing the protective effect of the protective film 200. In application, because there are no air bubbles on the cover plate surface, the suction nozzle will not cause the display module to fall off due to air bubbles, nor will it damage the display module, thus improving the yield rate of the display module.

[0056] The adjustment part 300 in the above embodiment includes a fan-shaped body hole with adhesive through hole. The adjustment part 300 can also be a through hole of other shapes. Figure 9 A schematic top view of another protective film 200 provided in an embodiment of this application in a planar state. (See attached image.) Figure 9 As shown, the protective film 200 has an adjustment part 300, which has a central through hole 301 and an adhesive through hole 302.

[0057] Unlike the embodiments described above, Figure 9 In the example, the adhesive through-hole 302 is an irregularly shaped through-hole. The thickness direction of the protective film of the adhesive through-hole 302 also has a first symmetry plane 3021. The central axis of the central through-hole 301 is also located within the first symmetry plane 3021. Figure 9 When the protective film 200 shown is attached to the convex surface of the cover plate body 100, the curved shape of the protective film 200 can also be adjusted by the adjustment part 300 so that the curved shape of the protective film 200 matches the curved shape of the convex surface of the cover plate body 100.

[0058] Specifically, the two sides of the adhesive through hole 302 are brought closer together in the first direction 20 and the second direction 30, respectively, until the two sides are completely adhered together, resulting in the following: Figure 10 The cover plate shown. It can be seen that... Figure 9 When the protective film 200 is attached to the cover plate body 100, the curved shape of the protective film can be adjusted based on the adjustment part 300 so that the curved shape of the protective film 200 matches the curved shape of the convex surface of the cover plate body 100, thereby reducing the generation of air bubbles.

[0059] It should be noted that the shape of the adjustment part 300 in this application embodiment is not limited to the shape described in the above two embodiments, but can be arbitrarily deformed, as long as it has the function of adjusting the curved shape of the protective film 200 so that the curved shape of the protective film 200 is adapted to the curved shape of the convex surface of the cover plate body 100.

[0060] In some embodiments, the protective film 200 may also have at least two adjustment portions. The following description uses an example where the adhesive through-hole 302 included in the adjustment portion 300 is a fan-shaped body hole, illustrating a scheme where the protective film 200 has multiple adjustment portions 300.

[0061] Figure 6 The protective film 200 has a central through hole 301 and an adhesive through hole 302. The central axis of the central through hole 301 is located within the first symmetry plane 3021 of the adhesive through hole 302. Figure 6 When the protective film 200 with an adhesive through-hole 302 is attached to the cover plate body 100, the two sides of the fan-shaped body of the adhesive through-hole 302 approach each other in a first direction 20 and a second direction 30, respectively, until the two sides are completely attached together, resulting in the following: Figure 5 The cover plate shown. It can be seen that the protective film 200 with an adhesive through hole 302 can achieve full coverage of the convex surface of the cover plate body 100, thereby reducing the generation of air bubbles on the surface of the cover plate body 100.

[0062] Figure 11 A schematic top view of another protective film 200 provided in an embodiment of this application in a planar state. (See attached image.) Figure 11 As shown, the protective film 200 has two adjustment portions 300. Since the two adjustment portions 300 share a central through-hole 301, therefore... Figure 11 The protective film 200 can be considered to have a central through hole 301 and two adhesive through holes 302. The first symmetry planes 3021 of the two adhesive through holes 302 coincide, that is, the central axis of the central through hole 301 is located within the first symmetry planes 3021 of the two adhesive through holes 302.

[0063] Figure 11The protective film 200 shown, which has two adhesive through holes 302, is actually divided into two parts by the two adhesive through holes 302. Figure 10 When the protective film 200 with two adhesive through holes 302 shown is attached to the cover plate body 100, it is necessary to attach the two sides of the fan-shaped body with the two adhesive through holes 302 respectively.

[0064] Specifically, the two sides of the fan-shaped portion of the first adhesive through-hole 302 approach each other along a first direction 20 and a second direction 30, respectively, until the two sides are completely fitted together. The two sides of the fan-shaped portion of the second adhesive through-hole 302 approach each other along a third direction 40 and a fourth direction 50, respectively, until the two sides are completely fitted together. The final result is... Figure 12 The cover plate shown.

[0065] The protective film 200 with two adhesive through holes 302 covers a smaller area on the convex surface of the cover plate body compared to the protective film 200 with only one adhesive through hole 302. Furthermore, during the application process, the two sides of the two adhesive through holes 302 need to be bonded separately, which makes the protective film 200 adhere more closely to the cover plate body 100, thereby further reducing the generation of air bubbles.

[0066] For example, see Figure 13 , Figure 13 The protective film 200 has a central through hole 301 and three adhesive through holes 302. The first symmetry planes of the three adhesive through holes 302 intersect, and the central axis of the central through hole 301 is located within the first symmetry plane of the three adhesive through holes 302.

[0067] Figure 13 The protective film 200 shown, which has three adhesive through-holes 302, is actually divided into three parts by the three adhesive through-holes 302. Figure 13 When the protective film 200 with three adhesive through holes 302 shown is attached to the cover plate body 100, it is necessary to attach the two sides of the fan-shaped body with the three adhesive through holes 302 respectively.

[0068] Specifically, the two sides of the sector-shaped part of the first adhesive through-hole 302 approach each other along a first direction 20 and a second direction 30, respectively, until the two sides are completely adhered together. The two sides of the sector-shaped part of the second adhesive through-hole 302 approach each other along a third direction 40 and a fourth direction 50, respectively, until the two sides are completely adhered together. The two sides of the sector-shaped part of the third adhesive through-hole 302 approach each other along a fifth direction 60 and a sixth direction 70, respectively, until the two sides are completely adhered together. The final result is... Figure 14 The cover plate shown.

[0069] The protective film 200 with three adhesive through holes 302 covers a smaller area on the convex surface of the cover plate body compared to the protective film 200 with two adhesive through holes 302. Furthermore, during the application process, it is necessary to apply adhesive to two sides on both sides of the three adhesive through holes 302 respectively. The application of the protective film 200 has a wider adjustment range, making the protective film 200 adhere more closely to the cover plate body 100, thereby further reducing the generation of air bubbles.

[0070] It should be noted that the number of adjustment parts 300, that is, the number of adhesive through holes 302, can be set according to actual usage requirements, and is not limited to the number shown in the exemplary embodiments above. For example, when the cover body is large, the number of adhesive through holes 302 can be set to four or five to further ensure that the protective film 200 fully covers the cover body 100, thereby further reducing the generation of air bubbles.

[0071] In some embodiments, at least two adjustment portions 300 may be unevenly distributed or evenly distributed around the central axis of the protective film 200. Compared to uneven distribution around the central axis of the protective film 200, even distribution around the central axis simplifies the production process of the protective film 200 and is more conducive to automated production. It also makes it easier to adjust the coverage area of ​​the protective film 200 on the cover plate body 100, ensuring full coverage of the convex surface of the cover plate body 100, thereby further reducing the generation of air bubbles on the surface of the cover plate body 100.

[0072] For example, see Figure 13 , Figure 13 The protective film 200 has a central through-hole 301 and three adhesive through-holes 302. The first symmetry planes 3021 of the three adhesive through-holes 302 intersect, and the central axis of the central through-hole 301 lies within the first symmetry planes 3021 of the three adhesive through-holes 302. Furthermore, the included angle between the first symmetry planes 3021 of any two adjacent adhesive through-holes 302 is 120°, meaning the three adhesive through-holes 302 are arranged in a circular array on the protective film 200 with the central axis of the protective film 200 as the array axis. This layout is more conducive to adjusting the coverage area of ​​the protective film 200 on the cover plate body 100.

[0073] It should be noted that the protective film 200 in this embodiment of the application has a central through hole 301 and an adhesive through hole 302, which can be obtained by punching.

[0074] For example, Figure 6During processing, the protective film 200 can undergo two punching processes, including fan-shaped punching to obtain the bonding through-hole 302 and central through-hole punching to obtain the central through-hole 301. Alternatively, a specially shaped punching tool can be used to perform a single punching process on the protective film 200 to simultaneously obtain the central through-hole 301 and the bonding through-hole 302. This application embodiment does not limit the processing methods for the central through-hole 301 and the bonding through-hole 302.

[0075] In some implementations, see Figure 15 The cover plate also includes a tear handle assembly 400 extending from the protective film 200. The tear handle assembly 400 is used to facilitate the removal of the protective film 200 from the cover plate body 100, thereby avoiding damage to the cover plate body 100 when removing the protective film 200 from the cover plate body 100.

[0076] See also Figure 15 The tearing assembly 400 has a second symmetry plane 401 in the thickness direction of the protective film 200, and the second symmetry plane 401 and the first symmetry plane 3021 have an included angle α, wherein 30°≤α≤180°.

[0077] When the protective film 200 is removed from the cover plate body 100 using the tearing tool 400, if the included angle between the second symmetry plane 401 and the first symmetry plane 3021 is too small, that is, if the tearing tool 400 is too close to the adhesive through hole 302, the protective film 200 is easily torn, resulting in the protective film 200 remaining on the cover plate body 100.

[0078] To avoid the angle between the second symmetry plane 401 and the first symmetry plane 3021 being too small, that is, to avoid the tearing handle component 400 being too close to the adhesive through hole 302, it is possible to avoid tearing the protective film 200 when using the tearing handle component to remove it from the cover plate body 100, thereby preventing the protective film 200 from remaining on the cover plate body 100.

[0079] For example, such as Figure 15 The angle between the second symmetry plane 401 of the tearing tool assembly 400 and the first symmetry plane 3021 of the adhesive through hole 302 is 90°. The tearing tool assembly 400 is far from the adhesive through hole 302. Therefore, when the protective film 200 is removed from the cover plate body 100 using the tearing tool assembly 400, it is not easy to tear the protective film 200, and the protective film 200 is not easy to remain on the cover plate body 100.

[0080] When the angle between the second symmetry plane 401 of the tear-handle assembly 400 and the first symmetry plane 3021 of the adhesive through hole 302 is 30°, the distance between the tear-handle assembly 400 and the adhesive through hole 302 is relatively large. Similarly, when using the tear-handle assembly 400 to remove the protective film 200 from the cover plate body 100, the protective film 200 is not easily torn. When the angle between the second symmetry plane 401 of the tear-handle assembly 400 and the first symmetry plane 3021 of the adhesive through hole 302 is 180°, the distance between the tear-handle assembly 400 and the adhesive through hole 302 is relatively large. Similarly, when using the tear-handle assembly 400 to remove the protective film 200 from the cover plate body 100, the protective film 200 is not easily torn.

[0081] Figure 15 In the cover plate shown, the central axis of the protective film 200 is located within the second symmetry plane 401 of the tear handle assembly 400. In some embodiments, the central axis of the protective film 200 may not be located within the second symmetry plane 401 of the tear handle assembly 400.

[0082] For example, such as Figure 16 The tearing handle assembly 400 shown has a second symmetry plane 401. Figure 15 The tearing hand component 400 shown is different from the one shown. Figure 16 The central axis of the protective film 200 shown is not located within the second symmetry plane 401 of the tearing hand assembly 400.

[0083] The second symmetry plane 401 and the first symmetry plane 3021 also have an included angle α. By limiting the size of the included angle to 30°≤α≤180°, the distance between the tearing handle assembly 400 and the adjustment part 300 can also be avoided from being too close. Therefore, when the protective film 200 is removed from the cover plate body 100 using the tearing handle assembly 400, it is not easy to tear the protective film 200, and the protective film 200 is not easy to remain on the cover plate body 100.

[0084] In some embodiments, the cover plate may include at least two tear handle components 400, and multiple tear handle components 400 may further prevent the protective film 200 from being left on the cover plate body 100 when it is torn.

[0085] For example, such as Figure 15 The cover plate shown includes two tear-handle components 400, each with a second plane of symmetry 401. Each of the two second planes of symmetry 401 forms an angle α with the first plane of symmetry, and both angles satisfy 30°≤α≤180°. This ensures that the two tear-handle components 400 are relatively far from the adjustment part 300, making it less likely to tear the protective film 200 when using either tear-handle component 400 to remove it from the cover plate body 100, thus minimizing the likelihood of the protective film 200 remaining on the cover plate body 100.

[0086] The cover plate, including two tear-hand components 400, also achieves the following effect: when removing the protective film 200 from the cover plate body 100 using one of the tear-hand components 400, the protective film 200 may be torn. This results in a portion of the protective film 200 being removed from the cover plate body 100, while another portion remains on the cover plate body 100. The portion of the protective film 200 remaining on the cover plate body 100 is connected to the other tear-hand component 400. At this point, only the other tear-hand component 400 needs to be used to remove the remaining protective film 200 from the cover plate body 100, thereby preventing the protective film 200 from remaining on the cover plate body 100 when torn.

[0087] It should be noted that the number of tearing handle components 400 is not limited in this embodiment. The number of tearing handle components 400 can be set according to actual needs to achieve the effect of completely removing the protective film 200 from the cover plate body 100.

[0088] In some implementations, such as Figure 15 As shown, the tearing assembly 400 includes a connecting portion 402 connected to the protective film 200, and a clamping portion 403 connected to the connecting portion 402 for clamping the protective film 200. The thickness of the connecting portion 402 can be set to be thicker than the thickness of the clamping portion 403.

[0089] For example, the thickness of the connecting portion 402 can be the same as the thickness of the protective film 200, while the thickness of the clamping portion 403 can be thinner than the thickness of the protective film 200. In this way, when the protective film 200 is removed from the cover body 100 using the tearing assembly 400, tearing of the connecting portion 402 and the protective film 200 at the connection point can be avoided, further preventing the protective film 200 from remaining on the cover body 100.

[0090] In some embodiments, the tearing assembly 400 further includes a deformable portion 404 located between the connecting portion 402 and the clamping portion 403. The deformable portion 404 is malleable, allowing for changes in the distance between the connecting portion 402 and the clamping portion 403. Because the deformable portion 404 of the tearing assembly 400 is malleable, the cover plate body 100 is not pulled during the process of removing the protective film 200 from the cover plate body 100 using the tearing assembly 400, thereby reducing damage to the surface of the cover plate body 100 during the film removal process.

[0091] In some embodiments, the projection of the deformable portion 404 onto the horizontal plane is Z-shaped. The direction of the horizontal plane is as follows: Figure 1The direction shown is 80. In order to make the deformable part 404 ductile, the deformable part 404 needs to be processed using a ductile material. The deformable part 404, the connecting part 402, and the clamping part 403 need to be processed using different materials, which increases the manufacturing difficulty of the tearing hand assembly 400.

[0092] In this embodiment, the deformable part 404 is designed in a Z-shape, and the special structure of the Z-shape is used to achieve the extensibility of the deformable part 404. The deformable part 404 does not need to be made of a material with extensibility, but can be made of the same material as the connecting part 402 and the clamping part 403, which reduces the manufacturing difficulty of the tearing hand assembly 400.

[0093] In some embodiments, the tearing handle assembly 400 is also provided with a through hole, which can be provided on the clamping part 403. When the protective film 200 is removed from the cover plate body 100 using the tearing handle assembly 400, the clamping part 403 can be clamped out. The protective film 200 is usually made of a smooth material, so when force is applied, the clamped object may slip off the clamping part 403. After providing a through hole on the clamping part 403, the friction between the clamped object and the protective film 200 can be increased, thereby preventing the clamped object from slipping off the clamping part 403 when force is applied, and improving the efficiency of removing the protective film 200.

[0094] In some implementations, such as Figure 8 As shown, the central through hole 301 has a bottom diameter R, where 1mm ≤ R ≤ 2mm. In this embodiment, the central through hole 301 can avoid tearing at the connection edge between the adhesive through hole 302 and the central through hole 301. To achieve this function, the bottom diameter R of the central through hole 301 needs to be greater than 1mm. If the bottom diameter R of the central through hole 301 is too large, it will reduce the protective effect of the protective film 200 on the cover plate body 100. Therefore, the bottom diameter R of the central through hole 301 can be limited to within 2mm.

[0095] It can be seen that setting the bottom diameter R of the central through hole 301 to 1mm≤R≤2mm can avoid the tearing problem at the joint edge between the adhesive through hole 302 and the central through hole 301, and can also avoid excessively reducing the protective range of the protective film 200 on the cover plate body 100.

[0096] In some implementations, such as Figure 8As shown, the adhesive through-hole 302 has a central angle β, where 2° ≤ β ≤ 4°. In this embodiment, the adhesive through-hole 302 enables adjustment of the curved surface shape of the protective film 200. To achieve this function, the central angle β of the adhesive through-hole 302 needs to be greater than 2° to ensure sufficient range for curved surface adjustment. If the central angle β of the adhesive through-hole 302 is too large, the protective film 200 will not be able to completely cover the convex surface of the cover plate body 100 when transitioning from a planar state to a curved state. Therefore, the central angle β of the adhesive through-hole 302 can be limited to within 4°.

[0097] It can be seen that setting the central angle β of the adhesive through hole 302 to 2°≤β≤4° can ensure the adjustment range of the adjustment part 300 and avoid the situation where the protective film 200 cannot completely cover the cover plate body 100.

[0098] A second aspect of this application provides a display module, including a cover plate body and a display panel, and a protective film as described in the first aspect. The protective film is adhered to the convex surface of the cover plate body, and the cover plate body is located on the light-emitting side of the display panel. After adopting the cover plate of this application, the display module of this embodiment can effectively reduce the chip loss rate in subsequent production processes, thereby improving the yield rate of the display module.

[0099] The table below shows the chip loss rate and chip loss percentage of display modules using cover plates with relevant technology in subsequent production processes.

[0100] Each process segment Film drop ratio Drop rate Film application section → Bending section 27 / 30 pieces 90％ Bend section 23 / 25 pieces 92％

[0101] The table below shows the chip loss ratio and chip loss rate of the display module using the cover plate of the embodiment of this application in subsequent production processes.

[0102] Each process segment Film drop ratio Drop rate Film application section → Bending section 0 / 100 pieces 0％ Bend section 0 / 100 pieces 0％

[0103] As can be seen from the two tables above, the display module using the cover plate of the embodiment of this application can effectively avoid chip loss in subsequent production processes.

[0104] A third aspect of this application provides a display device that includes a display module of the second aspect. By employing the display module of the second aspect in the display device, the yield rate of the display device product can be improved.

[0105] The display devices provided in this application embodiment may include smartwatches, AR (augmented display) devices, and VR (virtual reality) devices, etc.

[0106] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0107] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0108] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0109] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A protective film applied to a cover plate body having a spherical curved convex surface, characterized in that, The protective film has two states: a planar state and a curved state. The protective film changes from a planar state to a curved state during the process of being attached to the convex surface of the cover plate body. When the protective film is in a curved state, the curved shape of the protective film is adapted to the curved shape of the convex surface of the cover plate body; When the protective film is in a planar state, the protective film has at least one adjustment part, which is used to adjust the curved shape of the protective film when the protective film is transformed from a planar state to a curved state, so that the curved shape of the protective film is adapted to the curved shape of the convex surface of the cover plate body. The adjustment part has a central through hole and an adhesive through hole. The central through hole is a cylindrical hole, and the adhesive through hole is a fan-shaped hole. The central axis of the central through hole coincides with the central axis of the protective film, the adhesive through hole has a first symmetry plane in the thickness direction of the protective film, and the central axis of the central through hole is located within the first symmetry plane.

2. The protective film according to claim 1, characterized in that, At least two of the adjustment parts are arranged in a ring array on the protective film with the central axis of the protective film as the array axis.

3. The protective film according to claim 1, characterized in that, The central through hole has a bottom diameter R, wherein 1mm≤R≤2mm.

4. The protective film according to claim 1, characterized in that, The adhesive through-hole has a central angle β, wherein 2°≤β≤4°.

5. The protective film according to claim 1, characterized in that, The protective film also includes a tearing tool extending from the protective film, the tearing tool having a second plane of symmetry in the thickness direction of the protective film, the second plane of symmetry having an angle α with the first plane of symmetry, wherein 30°<α<180°.

6. The protective film according to claim 5, characterized in that, The tearing assembly includes a connecting portion connected to the protective film, and a clamping portion connected to the connecting portion for clamping the protective film.

7. The protective film according to claim 6, characterized in that, The tearing hand assembly also includes a deformable portion located between the connecting portion and the clamping portion. The deformable portion is extensible and allows for changes in the distance between the connecting portion and the clamping portion.

8. The protective film according to claim 7, characterized in that, The projection of the deformed part onto the horizontal plane is Z-shaped.

9. A display module, characterized in that, It includes a cover plate body and a display panel, and a protective film as described in any one of claims 1 to 8, the protective film being adhered to the convex surface of the cover plate body, the cover plate body being located on the light-emitting side of the display panel.

10. A display device, characterized in that, Includes the display module as described in claim 9.

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