Display module, display device and manufacturing method of display module

Abstract

The application provides a display module, a display device and a manufacturing method of the display module, and relates to the technical field of display. In order to solve the problem that static electricity is easily accumulated at the edge of a display panel, the display module provided by the application is provided with a groove filled with a liquid conductive medium on a supporting film below the display panel, so that the static electricity accumulated at the edge of the display panel is collected by the liquid conductive medium. The composite film layer of the application is further provided with a conductive channel corresponding to the conductive groove, so that the static electricity is conducted to the grounded metal bottom surface through the conductive channel in the composite film layer, so as to eliminate the static charge in the display module. Therefore, the display module provided by the application can eliminate the static charge accumulated at the edge area of the display panel, thereby eliminating the influence of the static charge on the thin film transistor, and avoiding the display abnormalities such as green screen, low gray scale green, and green screen in the screen-off display mode caused by the static charge.

Description

Technical Field

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

[0002] During the production, testing, and use of display modules, the surface of the display modules is often subjected to friction, generating static electricity. Some of this static charge is conducted along the display module to the edge of the display panel. When this static charge accumulates to a certain level, it can affect the display performance (e.g., green screen, low grayscale appearing green, etc.). Therefore, how to eliminate static electricity on the display panel is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0003] In view of this, embodiments of this application provide a display module, a display device, and a method for manufacturing the display module. This application eliminates static charge by constructing a charge conduction channel in the structure below the display panel and transferring static charge to a grounded metal bottom surface.

[0004] In a first aspect, this application provides a display module, which includes a display panel, a support film, and a composite film layer. The support film is located on the side of the display panel away from the light-emitting side; the composite film layer is located on the side of the support film away from the display panel; the support film has a conductive groove penetrating the support film, the conductive groove is disposed around the edge of the display panel and is located within the projection range of the display panel on the support film, and the conductive groove is filled with a liquid conductive medium; the composite film layer has a metal bottom surface on the side away from the light-emitting surface, and the composite film layer includes a conductive channel connecting the conductive groove and the metal bottom surface.

[0005] Furthermore, the composite film layer has a conductive groove corresponding to the conductive groove, wherein one end of the conductive groove extends to the area where the conductive groove is provided on the side of the support film away from the display panel, and the other end extends to the metal bottom surface; the conductive groove is filled with conductive foam, one end of the conductive foam is in contact with the liquid conductive medium in the conductive groove, and the other end is in contact with the metal bottom surface, thereby forming a conductive channel.

[0006] Furthermore, the composite membrane layer includes a mesh adhesive layer and a foam layer, wherein the mesh adhesive layer is close to the supporting membrane and the foam layer is close to the metal bottom surface; the conductive groove runs through the mesh adhesive layer, and the working thickness of the conductive foam of the mesh adhesive layer when it is in a compressed state matches the thickness of the mesh adhesive layer.

[0007] Preferably, the conductive groove penetrates the foam layer and the working thickness of the conductive foam in the foam layer when it is in a compressed state is the same as the thickness of the foam layer, or the foam layer is formed of conductive foam.

[0008] Preferably, the conductive resistance of the conductive foam between the liquid conductive medium and the metal bottom surface is <0.05Ω.

[0009] Furthermore, the conductive channels of the composite film protrude relative to the side of the composite film closer to the display panel, and enter the conductive groove to contact the liquid conductive medium.

[0010] Preferably, the width of the conductive groove is 1mm to 5mm.

[0011] Furthermore, the conductive groove includes a receiving structure and a connecting structure; the receiving structure is disposed around the edge of the display panel and located within the projection range of the display panel on the support film to receive the liquid conductive medium; the connecting structure is used to connect the bottom surface of the conductive groove with the side of the support film away from the display panel, so that the liquid conductive medium is electrically connected to the conductive channel.

[0012] Furthermore, the connecting structure is set on part of the bottom surface of the receiving structure, and the bottom surface of the receiving structure without the connecting structure forms a connecting structure connecting the supporting membranes on both sides of the receiving structure.

[0013] Furthermore, the connecting groove also includes a central receiving structure based on the central area of ​​the display panel, and the central receiving structure is filled with a liquid conductive medium.

[0014] Secondly, this application also provides a display device, which includes the display module described in the first aspect.

[0015] Thirdly, this application also provides a method for manufacturing a display module. The method includes: providing a display panel, a support film, and a composite film layer, wherein the support film has a conductive groove penetrating the support film, the conductive groove is disposed around the edge of the display panel and located within the projection range of the display panel on the support film; the composite film layer has a metal bottom surface on the side away from the light-emitting surface, and the composite film layer includes a conductive channel; performing a first bonding process to bond the side of the composite film layer away from the metal bottom surface to the support film, so that the conductive channel is aligned with the conductive groove of the support film; filling the conductive groove with a liquid conductive medium to achieve electrical connection between the liquid conductive medium and the metal bottom surface; and performing a second bonding process to bond the side of the support film away from the composite film layer to the side of the display panel away from the light-emitting side.

[0016] Further, a second bonding process is performed to bond the side of the support film away from the composite film layer to the side of the display panel away from the light-emitting side, including: performing an adhesive dispensing process on the side of the support film away from the composite film layer based on the conductive groove; and performing the second bonding process to bond the side of the support film away from the composite film layer to the side of the display panel away from the light-emitting side, so that the adhesive overflows into the conductive groove.

[0017] Based on the display module, display device, and manufacturing method of the display module provided in this application, to solve the problem of static electricity easily accumulating at the edges of the display panel, the display module provided in this application has grooves opened on the support film under the display panel and filled with a liquid conductive medium, thereby collecting the static electricity accumulated at the edges of the display panel through the liquid conductive medium. The composite film layer of this application is also provided with conductive channels corresponding to the conductive grooves, thereby conducting the static electricity to the grounded metal bottom surface through the conductive channels in the composite film layer to eliminate the static charge in the display module. Thus, the display module provided in this application can eliminate the static charge accumulated in the edge area of ​​the display panel, thereby eliminating the influence of static charge on the thin-film transistor and avoiding display abnormalities such as green screen, low grayscale greening, and green screen in always-on display mode caused by static charge. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a display module in some embodiments of the present application.

[0020] Figure 2 This is a cross-sectional schematic diagram of the display module at point AA in some embodiments of the present application.

[0021] Figure 3 This is a cross-sectional schematic diagram of the display module provided in some embodiments of this application at point AA.

[0022] Figure 4 This is a schematic diagram of the structure of a support membrane provided in some embodiments of this application.

[0023] Figure 5 This is provided by some embodiments of this application. Figure 3 The image shows two magnified views of the display module in area B.

[0024] Figure 6 This is a schematic diagram of another support membrane structure provided in some embodiments of this application.

[0025] Figure 7 This is a schematic diagram of the structure of another support membrane provided in some embodiments of this application.

[0026] Figure 8 This is provided by some embodiments of this application. Figure 7 The diagram shows a cross-sectional view of the support membrane at CC.

[0027] Figure 9 This is provided by some embodiments of this application. Figure 7 The diagram shows a cross-sectional view of the support membrane at DD.

[0028] Figure 10 This is a flowchart of a method for manufacturing a display module provided in some embodiments of this application.

[0029] Among them, 100 is the display module; 110 is the display panel; 120 is the support film; 121 is the conductive groove; 1211 is the housing structure; 1212 is the connecting structure; 122 is the liquid conductive medium; 123 is the central housing structure; 130 is the composite film layer; 131 is the mesh adhesive layer; 132 is the foam layer; 133 is the metal bottom surface; 134 is the conductive channel; 135 is the conductive groove; 141 is the cover plate; 142 is the optical bonding adhesive; 143 is the polarizer layer; and 200 is the copper rod. Detailed Implementation

[0030] The following description, with reference to the accompanying drawings, illustrates preferred embodiments of the present invention, demonstrating its implementability. These embodiments provide a complete overview of the invention for those skilled in the art, making its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0031] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0034] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of components is appropriately exaggerated in some places in the drawings.

[0035] Furthermore, the following descriptions of the embodiments of the invention are made with reference to the accompanying illustrations, illustrating specific embodiments in which the invention can be implemented. Directional terms used in this invention, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and "side," are merely directional references to the accompanying drawings. Therefore, the use of directional terms is for better and clearer explanation and understanding of the invention, and does not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] When a component is described as being "on" another component, the component may be placed directly on the other component; alternatively, there may be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "installed to" or "connected to" another component, both can be understood as being directly "installed" or "connected" to, or as being indirectly "installed to" or "connected to" another component via an intermediate component.

[0037] Application Overview:

[0038] As described in the background art, electronic devices with display modules are prone to static electricity during daily use due to friction between the electronic device and external objects (such as clothing). Static charge generally accumulates on the surface of the cover of the electronic product.

[0039] Besides daily use, electrostatic discharge (ESD) testing may also be involved in the screen's production testing process. For example, copper rod friction testing is often performed in screen quality testing. This copper rod friction test is a method used to evaluate the durability of the display module.

[0040] Specifically, copper rod friction tests are often conducted using specialized equipment (such as a copper rod friction tester). These tests simulate different friction scenarios encountered during display module use using a copper rod or other test heads such as styluses, steel wool, or erasers, to examine the wear resistance of the device's touchscreen. Considering the frequent friction involved in the aforementioned tests, the copper rod may possess a certain potential in some scenarios. This often results in a rapid accumulation of a large amount of electrostatic charge generated by friction on the surface of the display module during the copper rod friction test.

[0041] In summary, during the production testing and daily use of electronic devices with display modules, a large amount of electrostatic charge may accumulate on the display panel.

[0042] If the accumulated charge on the display panel is not dissipated in time, it will seriously affect the display effect. For example, the aforementioned electrostatic charge will form a strong potential body on the surface of the display panel, which can easily cause the TFT characteristics of the display to shift (generally manifested as a shift in the threshold voltage (Vth) due to charge accumulation). After long-term operation, the drift characteristics of the TFT will lead to abnormal current control: the preset grayscale voltage (such as V2) needs to be adjusted to V1 after drifting to obtain the correct current. If the original voltage is still used for driving, the actual current will deviate from the target value, resulting in insufficient brightness of red and blue pixels, while green pixels, due to their high luminous efficiency, will ultimately present a low grayscale with a green tint. Specifically, this can manifest as a green screen at the screen edges, a green tint in low grayscale, and a green screen in the always-on display mode, among other display abnormalities.

[0043] To further illustrate the foregoing, this application also provides a display module and its cross-sectional view to illustrate the generation and transfer of charge. Wherein, Figure 1 This application provides a display module, namely... Figure 1 This is a top view schematic diagram of a display module provided in an embodiment of the present invention.

[0044] like Figure 1 As shown, the form of the display module 100 can be adjusted according to the electronic device in which it is actually used. Figure 1 The display module 100 shown can be used as the display screen of a mobile phone. The display module 100 can be shaped as a rounded rectangle, and a hole can be cut out at the camera to place the front-facing camera.

[0045] Furthermore, the dashed frame in the display module 100 can reflect the range of its display area, that is, the display module 100 can release a beam of light within the display area of ​​the dashed frame to display the corresponding image.

[0046] Based on the aforementioned display range, the actual display module 100 generally includes a display area and a non-display area. The display area (i.e., the area within the dashed box in the figure) may include multiple pixel units (not shown) and signal lines (not shown) electrically connected to the pixel units. The non-display area (i.e., the area outside the dashed box in the figure) includes wiring and / or driving circuitry. For example, the display panel may be a display panel employing self-emissive technology; that is, the aforementioned pixel units may include any one of Organic Light Emitting Diode (OLED), Quantum Dot Light Emitting Diode (QLED), or Micro Light Emitting Diode (Micro-LED). Alternatively, the display panel may also be a Liquid Crystal Display (LCD). For ease of subsequent description, the aforementioned display module 100 may be configured as an OLED Panel. Other types of display modules can be adaptively adjusted based on the structure and fabrication method provided in this application.

[0047] In some embodiments, the aforementioned display module 100 can be packaged using flexible packaging technology, that is, the actual non-display area of ​​the display module 100 can be larger than the device size, and spatial stacking can be achieved by bending or other methods to reduce the size of the aforementioned non-display area.

[0048] like Figure 1 As shown, in the copper rod friction test, the display module 100 can interact with the copper rod 200, thereby generating static electricity on the display module 100 through the copper rod 200. Specifically, during the test, relevant personnel can use the copper rod 200 to rub back and forth along the edge of the display area on the cover surface of the display module 100 at a certain speed, thus simulating normal use on the surface of the display module 100. This process often generates static charge. The antistatic properties of the display module 100 can also be tested during the copper rod friction test. Specifically, the degree of greenish tint in the edge area can be sampled to determine the antistatic properties of the screen.

[0049] To further illustrate the transfer process of electrostatic charge within the display module 100, this application also addresses... Figure 1 The display module 100 in Figure 1 A section is taken at point AA as shown, forming... Figure 2 .

[0050] like Figure 2As shown, when the display module 100 is an OLED flexible display module, the display module 100 includes, in the opposite direction of the light emission direction (from top to bottom), a cover plate 141, an optical bonding adhesive 142, a polarizing film layer 143, a display panel 110, a support film 120, and a composite film layer 130. The composite film layer 130 may further include a mesh adhesive layer 131, a foam layer 132, and a metal bottom surface 133.

[0051] Considering the conductivity of the aforementioned layered structure, the charge formed on the cover plate 141 (shown as a circular gray circle in the figure) will move downwards along the edge of the display module 100. Given that the support film 120, the mesh adhesive layer 131, and the foam layer 132 are often constructed of insulating materials with poor conductivity, and the metal bottom surface 133 cannot contact the display panel 110, static charge tends to accumulate on the surface where the support film 120 adheres to the display panel 110, particularly at the edge of the display panel 110. Consequently, static charge continuously accumulates on the lower surface of the display panel 110, failing to dissipate effectively, resulting in a greenish tinge at the edges and an abnormal image.

[0052] To address the issue of static electricity accumulation at the edges of display panels, the display module provided in this application features grooves in the support film beneath the display panel, filled with a liquid conductive medium. This liquid conductive medium collects the static electricity accumulated at the edges of the display panel. The composite film layer of this application also has conductive channels corresponding to the conductive grooves, allowing static electricity to be conducted to a grounded metal base surface through these channels, thereby eliminating static charge within the display module. Thus, the display module provided in this application can eliminate static charge accumulated at the edges of the display panel, thereby eliminating the impact of static charge on thin-film transistors and preventing display anomalies caused by static charge, such as green screen, low grayscale greening, and green screen in always-on display mode.

[0053] The following is combined with Figures 2 to 10 This application provides a detailed description of the display module and its manufacturing method.

[0054] Example display module:

[0055] To discharge the electrostatic charge accumulated at the edges of the display panel, this application optimizes the hierarchical structure beneath the display panel, resulting in an overall appearance of the display module that is similar to the aforementioned... Figure 1 The structures shown are basically the same.

[0056] Different from Figure 1 The display modules shown have different cross-sectional structures at AA, based on the electrostatic charge optimized display module. Therefore, this application... Figure 3 A cross-sectional schematic diagram of the display module provided in this application at point AA is shown.

[0057] like Figure 3The display module 100 and Figure 2 The hierarchical structure of the display module 100 shown is similar. Considering Figure 3 The display module 100 shown emphasizes the handling of electrostatic charges within the display module 100. Figure 3 The display module 100 shown may include a display panel 110, a support film 120, and a composite film layer 130. The support film 120 is located on the side of the display panel 110 away from the light-emitting side, and the composite film layer 130 is located on the side of the support film 120 away from the display panel 110. Furthermore, the display module 100 may also include... Figure 2 The various layers of the structure (such as the cover plate 141, optical bonding adhesive 142, and polarizer layer 143 disposed above the display panel 110).

[0058] As mentioned above, the support film 120 is typically constructed based on an insulating material. To facilitate the discharge of electrostatic charges from the edge of the display panel 110, the support film 120 has a conductive groove 121 extending through it. The conductive groove 121 may be filled with a liquid conductive medium 122, thereby transferring the electrostatic charges from the edge of the display panel 110 through the liquid conductive medium 122.

[0059] Considering that electrostatic charge is generally evenly distributed on the display panel 110, the aforementioned conductive groove 121 can be disposed around the edge of the display panel 110 and located within the projection range of the display panel 110 on the support film 120, so that the liquid conductive medium 122 can be aligned with the edge area of ​​the display panel 110 where electrostatic charge is accumulated. When the electronic device equipped with the display module 100 provided in this application is operated by the user, the liquid conductive medium 122 will contact the side of the display panel 110 where electrostatic charge is accumulated, and transfer the electrostatic charge to the liquid conductive medium 122.

[0060] To further illustrate the arrangement of the conductive groove 121 on the support film 120, this application... Figure 4 A schematic diagram of the structure of a support membrane is also provided.

[0061] like Figure 4 As shown, considering Figure 3 If the display panel 110 and the support film 120 are similar in shape and size, then the projection edge of the display panel 110 on the support film 120 coincides with the edge of the support film 120. Thus, the conductive groove 121 can be arranged along the edge of the support film 120, so that the conductive groove 121 can be arranged around the edge of the display panel 110 and located within the projection range of the display panel 110 on the support film 120.

[0062] like Figure 4As shown, the conductive groove 121 can form a closed annular structure whose shape matches the edge of the support film 120 (i.e., the edge of the display panel 110). For example, the distance from the conductive groove 121 to the edge of the support film 120 is within a certain range, thereby surrounding the edge of the display panel 110.

[0063] In some embodiments, considering the insulating properties of the support film 120, the aforementioned conductive groove 121 can penetrate the support film 120 so that one end of the liquid conductive medium 122 can contact the back of the display panel 110 and the other end can contact the conductive channel 134 during its movement.

[0064] Furthermore, considering that the composite film layer 130 has a metal bottom surface 133 on the side away from the light-emitting surface, this metal bottom surface 133 is generally formed of a conductive metal material such as copper and its surface is grounded to the whole machine, while the other structures of the composite film layer 130 (i.e., the aforementioned mesh adhesive layer 131 and foam layer 132) are also generally constructed of insulating materials. In order to discharge the electrostatic charge transferred to the liquid conductive medium 122, a conductive channel 134 connecting the conductive groove 121 and the metal bottom surface 133 can be formed in the aforementioned composite film layer 130.

[0065] The conductive channel 134 can be formed of a conductive material. Specifically, a groove can be made in the area of ​​the composite film layer 130 corresponding to the aforementioned conductive groove 121 and filled with the corresponding conductive material to form the conductive channel 134.

[0066] Therefore, based on the aforementioned structure, the display module provided in this application can have grooves cut into the support film beneath the display panel and filled with a liquid conductive medium, thereby collecting static electricity accumulated at the edge of the display panel through the liquid conductive medium. The composite film layer of this application also has conductive channels corresponding to the conductive grooves, thereby conducting static electricity to the grounded metal bottom surface through the conductive channels in the composite film layer to eliminate static charge within the display module. Thus, the display module provided in this application can eliminate static charge accumulated in the edge area of ​​the display panel, thereby eliminating the influence of static charge on the thin-film transistors and avoiding display abnormalities such as green screen, low grayscale greening, and green screen in always-on display mode caused by static charge.

[0067] In some embodiments, considering the liquid properties of the liquid conductive medium 122, to prevent the liquid conductive medium 122 from overflowing, the environment in which the liquid conductive medium 122 is located can form a cavity to contain the liquid conductive medium 122. Therefore, the aforementioned conductive channel 134 should be able to support the liquid conductive medium 122, thereby forming a closed cavity to contain the liquid conductive medium 122 through the display panel 110, the sidewall of the conductive groove 121, and the conductive channel 134, to prevent the liquid conductive medium 122 from flowing out.

[0068] To ensure that the conductive channel 134 supports the liquid conductive medium 122, the conductive channel 134 of the composite film layer 130 protrudes from the side of the composite film layer 130 closest to the display panel 110, so that the conductive channel 134 enters the conductive groove 121 and contacts the liquid conductive medium 122, serving as the bottom surface of the aforementioned accommodating space.

[0069] In some embodiments, the aforementioned conductive channel 134 may be implemented using a solid elastic conductive medium to ensure the sealing of the conductive channel 134 at the bottom surface of the aforementioned conductive groove 121. In addition, the side of the conductive channel 134 that contacts the liquid conductive medium 122 may also be treated with a liquid-proof coating (such as a film coating) to prevent leakage of the liquid conductive medium 122.

[0070] To further illustrate the cooperation between the support film 120 and the composite film layer 130 in the conductive trench 121, this application also... Figure 5 Two locally magnified structures (B1, B2) are provided for the structure of this region.

[0071] As shown in the magnified structure B1, the aforementioned composite film layer 130 has been grooved in its layered structure above the metal bottom surface 133, forming a conductive groove 135 corresponding to the conductive groove 121. One end of the conductive groove 135 extends to the area of ​​the support film 120 away from the display panel 110 where the conductive groove 121 is located (i.e., the conductive groove 121 penetrates the support film 120), and the other end extends to the metal bottom surface 133.

[0072] Considering the actual structure of each layer in the composite film layer 130, the conductive medium used to form the conductive channel 134 in the conductive groove 135 can be conductive foam. Thus, the conductive groove 135 can be filled with conductive foam, so that one end of the conductive foam contacts the liquid conductive medium 122 in the conductive groove 121, and the other end contacts the metal bottom surface 133, thereby forming the conductive channel 134.

[0073] Further, as shown in the magnified structure B1, the composite film layer 130 may include a mesh adhesive layer 131 and a foam layer 132, and the aforementioned conductive groove 135 may penetrate through the mesh adhesive layer 131 and the foam layer 132. To ensure the flatness of the mesh adhesive layer 131 and the foam layer 132, the working thickness of the conductive foam at the mesh adhesive layer 131 when in a compressed state matches the thickness of the mesh adhesive layer 131, and the working thickness of the conductive foam at the foam layer 132 when in a compressed state matches the thickness of the foam layer 132.

[0074] The aforementioned "the working thickness of the conductive foam at the mesh adhesive layer 131 when it is in a compressed state matches the thickness of the mesh adhesive layer 131" can be understood in conjunction with the aforementioned situation where the conductive channel 134 enters the conductive groove 121. That is, the working thickness of the conductive foam at the mesh adhesive layer 131 when it is in a compressed state can be slightly greater than the thickness of the mesh adhesive layer 131, so that the conductive channel 134 protrudes relative to the side of the composite film layer 130 closer to the display panel 110, and enters the conductive groove 121 to contact the liquid conductive medium 122.

[0075] In some embodiments, considering that the material of the foam layer 132 is foam, conductive foam can be directly used to construct this layer. In this case, the conductive groove 135 does not need to penetrate through the foam layer 132, and the conductive foam at the mesh adhesive layer 131 can extend from the foam layer 132.

[0076] As shown in the magnified structure B2, the aforementioned conductive groove 135 only penetrates the mesh adhesive layer 131. At this time, the foam layer 132 can be made of conductive foam, and the conductive foam of the mesh adhesive layer 131 can be part of the lower foam layer 132, so as to further ensure the flatness of the foam layer 132 and the mesh adhesive layer 131.

[0077] Based on the aforementioned configuration, the conductive resistance of the conductive foam between the liquid conductive medium and the metal base is less than 0.05Ω, ensuring charge conduction. Furthermore, the width of the conductive groove 121 is 1mm to 5mm, and the size of the conductive channel 134 can be adapted to the device to ensure normal charge transfer.

[0078] In some embodiments, considering that some electrostatic charge may be concentrated in the central region of the display panel 110, in order to further eliminate the electrostatic charge accumulated at the display panel 110, the conductive groove also includes a central receiving structure based on the central region of the display panel, the central receiving structure being filled with a liquid conductive medium.

[0079] To further illustrate this point, this application also provides a support membrane with a central accommodating structure. Figure 6 ).like Figure 6 As shown, a central receiving structure 123 can be formed in the central region of the support film 120. This central receiving structure 123 can also be filled with a liquid conductive medium, thereby absorbing the electrostatic charge of the corresponding region of the central region structure of the display panel 110. Correspondingly, the conductive channel 134 of the lower composite film layer 130 can also include a conductive channel connecting the central receiving structure 123 and the metal bottom surface 133.

[0080] In some embodiments, considering that the liquid conductive medium 122 mainly transfers electrostatic charge to itself through contact with the display panel 110 during operation, the liquid conductive medium 122 can be disposed along the edge of the display panel 110 on the side close to the display panel 110, without needing to have grooves at all locations penetrating the support film 120.

[0081] To illustrate the case where the conductive groove 121 penetrates the support membrane 120, the aforementioned conductive groove 121 can be further divided into a receiving structure and a connecting structure. The receiving structure can refer to a groove structure that receives the liquid conductive medium 122 but does not penetrate the support membrane 120, while the connecting structure can refer to a through-hole structure that connects the receiving groove to the lower conductive channel 134 through the support membrane 120.

[0082] To further illustrate the aforementioned accommodating and connecting structures, this application... Figure 7 A schematic diagram of the supporting membrane, including the containment structure and the connecting structure, is provided.

[0083] like Figure 7 As shown, the aforementioned conductive groove 121 may consist of a groove that does not penetrate the support membrane 120 (i.e., the aforementioned receiving structure 1211) and a through hole (i.e., the aforementioned connecting structure 1212) provided on the bottom surface of the groove portion and penetrating the support membrane 120.

[0084] Specifically, the aforementioned receiving structure 1211 is disposed around the edge of the display panel 110 and located within the projection range of the display panel 110 on the support film 120 to receive the liquid conductive medium 122. The connecting structure 1212 is used to connect the bottom surface of the conductive groove 121 with the side of the support film 120 away from the display panel 110, thereby electrically connecting the liquid conductive medium 122 with the conductive channel 134.

[0085] like Figure 7 As shown, the aforementioned connecting structure 1212 can be provided on part of the bottom surface of the conductive groove 121, that is, the connecting structure 1212 does not completely connect the receiving structure 1211 at the aforementioned position, so that at least part of the bottom surface of the conductive groove 121 is reserved to connect the support film 120 on both sides of the conductive groove 121, thereby avoiding the conductive groove 121 directly splitting the support film 120 into two structures, thus reducing the assembly difficulty of the support film 120.

[0086] To further illustrate the situation where the connecting structure 1212 is located on part of the bottom surface of the conductive groove 121, Figure 7 It contains two cross-sectional lines, CC and DD. CC passes through a connected structure 1212, while DD does not. This application also provides schematic cross-sectional views of the aforementioned CC section. Figure 8 ) and a cross-sectional diagram at DD ( Figure 9 ).

[0087] like Figure 8 As shown, in the conductive groove 121 provided with the connecting structure 1212, the conductive groove 121 may include a receiving structure 1211 whose bottom surface does not penetrate the support membrane 120 and a connecting structure 1212 provided on the bottom surface of the receiving structure 1211 and penetrating the support membrane 120.

[0088] Considering that the connecting structure 1212 penetrates the support membrane 120, in Figure 8 In the process, the support membrane 120 is divided into three non-connected parts by the conductive groove 121. If the connecting structure 1212 penetrates all the bottom surfaces of the receiving structure 1211, the support membrane 120 will be split into two isolated mechanisms by the conductive groove 121, thereby increasing the assembly difficulty.

[0089] like Figure 9 As shown, for the conductive groove 121 without a connecting structure, the conductive groove 121 only includes a receiving structure 1211 that does not penetrate the support membrane 120. Therefore, the bottom surface of the receiving structure 1211 without the connecting structure 1212 forms a connecting structure connecting the support membranes 120 on both sides of the receiving structure 1211, thereby achieving communication between the support membranes 120 on both sides of the conductive groove 121. That is, as... Figure 9 As shown, the support film 120 is only presented as a structure with two grooves, and is not isolated into two independent structures by the conductive groove 121.

[0090] Therefore, by setting a connecting structure 1212 on only part of the bottom surface of the conductive groove 121, the complete structure of the support film 120 is maintained, avoiding the disassembly of the support film 120 by the conductive groove 121 and reducing the assembly difficulty of the support film 120.

[0091] In addition, corresponding to the aforementioned connecting structure 1212, the conductive channel 134 below can also be set based on the location of the connecting structure 1212, without forming a closed ring structure, which further ensures the flatness of the composite film layer 130.

[0092] Exemplary manufacturing method and display device for display module:

[0093] To obtain the aforementioned Figures 3-9 The display module shown in this application Figure 10 A method for manufacturing a display module is also provided.

[0094] like Figure 10 As shown, the manufacturing method P300 for the display module may include the following steps:

[0095] S310 provides display panels, support films, and composite film layers.

[0096] S320. Perform the first bonding process to bond the side of the composite film layer away from the metal bottom surface to the support film so that the conductive channel is aligned with the conductive groove of the support film.

[0097] S330. Fill the conductive tank with liquid conductive medium so that the conductive channel achieves electrical connection between the liquid conductive medium and the metal bottom surface.

[0098] S340. Perform the second bonding process to bond the side of the support film away from the composite film layer to the side of the display panel away from the light-emitting side.

[0099] In the aforementioned steps, S310 can provide a complete display panel, a support film, and a composite film layer. The specific structure of each layer can be found in the preceding description. Figures 3-9 The relevant descriptions will not be repeated here.

[0100] In steps S320 to S340, the aforementioned display panel, support film, and composite film layer can be achieved through an adhesive bonding process. During the bonding process, a liquid conductive medium is injected to achieve the electrostatic charge conductive structure provided in this application. Specifically, since both the upper and lower surfaces of the support film contain protective films during the bonding process, existing module factory equipment can be used to perform grooved design and attachment of the protective layer according to this proposal, thereby achieving the bonding of the display panel, support film, and composite film layer.

[0101] It should be noted that the aforementioned P300 is only one execution method. In the actual preparation process, the execution order of the aforementioned S320 and S340 can also be reversed, as long as it is ensured that there is a port for injecting liquid conductive medium when executing S330.

[0102] In some embodiments, to ensure that the liquid level of the liquid conductive medium does not exceed the conductive groove, the dispensing process can be optimized based on the conductive groove during the aforementioned second bonding process. This allows the dispensing process to be performed on the side of the support film away from the composite film layer, based on the conductive groove. The second bonding process is then performed, causing the side of the support film away from the composite film layer to adhere to the side of the display panel away from the light-emitting side, so that the adhesive overflows into the conductive groove.

[0103] Therefore, based on the aforementioned overflow situation in the conductive tank, the liquid conductive medium has a higher liquid level in the middle of the conductive tank, while its height is lower and below the conductive tank on both sides near the sides. Furthermore, to further prevent the liquid conductive medium from overflowing, a material with poor flowability can be selected as the liquid conductive medium.

[0104] Based on the same inventive concept, this application also provides a display device, which includes the aforementioned display module. The specific structure of the display module has been described in detail in the above embodiments and will not be repeated here. This display device can be any electronic device with display functionality, such as a mobile phone, tablet computer, laptop computer, e-reader, or television set.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display module, characterized in that: The display module includes a display panel, a support film, and a composite film layer, wherein the support film is located on the side of the display panel away from the light-emitting side; and the composite film layer is located on the side of the support film away from the display panel. The support film has a conductive groove that extends through the support film. The conductive groove is arranged around the edge of the display panel and is located within the projection range of the display panel on the support film. The conductive groove is filled with a liquid conductive medium. The composite film layer includes a mesh adhesive layer, a foam layer, and a metal bottom surface. The metal bottom surface is away from the light-emitting side, the mesh adhesive layer is close to the support film, and the foam layer is close to the metal bottom surface. A conductive channel connecting the conductive groove and the metal bottom surface is formed in the mesh adhesive layer and the foam layer. When the display panel is rubbed and static charge accumulates on its surface, the static charge moves along the edge of the display module into the display module and is transferred to the metal bottom surface via the conductive groove and the conductive channel.

2. The display module according to claim 1, characterized in that: The composite film layer has a conductive groove corresponding to the conductive groove, wherein one end of the conductive groove extends to the area where the conductive groove is provided on the side of the support film away from the display panel, and the other end extends to the metal bottom surface; The conductive groove is filled with conductive foam. One end of the conductive foam is in contact with the liquid conductive medium in the conductive groove, and the other end is in contact with the metal bottom surface, thus forming the conductive channel.

3. The display module according to claim 2, characterized in that: The conductive groove penetrates the mesh adhesive layer, and the working thickness of the conductive foam of the mesh adhesive layer when it is in a compressed state matches the thickness of the mesh adhesive layer; Preferably, the conductive groove penetrates the foam layer and the working thickness of the conductive foam in the foam layer when it is in a compressed state is the same as the thickness of the foam layer, or the foam layer is formed using the conductive foam; Preferably, the conductive foam has a conductive impedance of <0.05Ω between the liquid conductive medium and the metal bottom surface.

4. The display module according to claim 1, characterized in that: The conductive channel of the composite film layer protrudes relative to the side of the composite film layer closer to the display panel and enters the conductive groove to contact the liquid conductive medium; Preferably, the width of the conductive groove is 1mm to 5mm.

5. The display module according to claim 1, characterized in that: The conductive groove includes a receiving structure and a connecting structure; The accommodating structure is disposed around the edge of the display panel and located within the projection range of the display panel on the support film to accommodate the liquid conductive medium; The connecting structure is used to connect the bottom surface of the conductive groove with the side of the support film away from the display panel, thereby electrically connecting the liquid conductive medium with the conductive channel.

6. The display module according to claim 5, characterized in that: The connecting structure is disposed on a portion of the bottom surface of the receiving structure, and the bottom surface of the receiving structure without the connecting structure forms a connecting structure connecting the support membranes on both sides of the receiving structure. Preferably, the conductive channel is configured based on the interconnection structure.

7. The display module according to claim 1, characterized in that: The conductive groove also includes a central receiving structure based on the central area of ​​the display panel, and the central receiving structure is filled with the liquid conductive medium.

8. A display device, characterized in that: Includes the display module as described in any one of claims 1-7.

9. A method for manufacturing a display module, characterized in that: The preparation method includes: A display panel, a support film, and a composite film layer are provided. The support film has a conductive groove penetrating the support film. The conductive groove is disposed around the edge of the display panel and located within the projection range of the display panel on the support film. The composite film layer includes a mesh adhesive layer, a foam layer, and a metal bottom surface. The metal bottom surface is away from the light-emitting side. The mesh adhesive layer is close to the support film. The foam layer is close to the metal bottom surface. A conductive channel connecting the conductive groove and the metal bottom surface is formed in the mesh adhesive layer and the foam layer. Perform the first bonding process to bond the side of the composite film layer away from the metal bottom surface to the support film, so that the conductive channel is aligned with the conductive groove of the support film. A liquid conductive medium is filled into the conductive groove so that the conductive channel achieves an electrical connection between the liquid conductive medium and the metal bottom surface; A second bonding process is performed to bond the side of the support film away from the composite film layer to the side of the display panel away from the light-emitting side.

10. The method for manufacturing a display module according to claim 9, characterized in that: The second bonding process, which involves bonding the side of the support film away from the composite film layer to the side of the display panel away from the light-emitting side, includes: Based on the conductive groove, a dispensing process is performed on the side of the support film away from the composite film layer. A second bonding process is performed to bond the side of the support film away from the composite film layer to the side of the display panel away from the light-emitting side, so that the adhesive overflows into the conductive groove.

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