A display module and a folding screen terminal

Abstract

The present application provides a display module and a folding screen terminal, which relate to the technical field of electronic equipment. It is used to solve the problem that the folding screen terminal is prone to abnormal noise during rotation, which affects the user experience. The above-mentioned display module includes a display screen, a support layer, a first protective layer and a protective coating. The display screen has a display surface. The support layer is stacked on the side of the display screen away from the display surface, and the support layer includes a bending area and non-bending areas on both sides of the bending area. The first protective layer is stacked on the side of the support layer away from the display screen, and the first protective layer at least covers the bending area. The protective coating is applied to the side of the first protective layer away from the support layer, covering at least a part of the first protective layer. Among them, the roughness of the surface of the protective coating away from the first protective layer is greater than the roughness of the surface of the first protective layer facing the protective coating.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a display module and a folding screen terminal. Background Art

[0002] Folding screen terminals are favored by consumers because they can achieve large screen display (when the folding screen terminal is in the unfolded state). The folding screen terminal includes a display module and a support component, the display module is attached to and supported on the support component, and the support component can drive the display module to rotate so that the folding screen terminal can rotate between the unfolded state and the folded state.

[0003] However, during the rotation of the folding screen terminal, the local area between the display module and the supporting assembly will separate from each other. During the separation process, abnormal noise will be generated, affecting the user experience. Summary of the invention

[0004] The embodiments of the present application provide a display module and a folding screen terminal, which are used to solve the problem that the folding screen terminal is prone to generate abnormal noise during rotation, thereby affecting the user experience.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a display module is provided, which includes a display screen, a support layer, a first protective layer and a protective coating. The display screen has a display surface. The support layer is stacked on a side of the display screen away from the display surface, and the support layer includes a bending area and non-bending areas on both sides of the bending area. The first protective layer is stacked on a side of the support layer away from the display screen, and the first protective layer at least covers the bending area. The protective coating is applied to a side of the first protective layer away from the support layer, covering at least a portion of the first protective layer. The roughness of the surface of the protective coating away from the first protective layer is greater than the roughness of the surface of the first protective layer facing the protective coating.

[0007] The display module provided in the first aspect of the present application is provided with a protective coating on the side of the first protective layer away from the supporting layer, and the protective coating at least covers a partial area of ​​the first protective layer, that is, the protective coating on the display module can be attached to the supporting component of the folding screen terminal. Since the surface roughness of the protective coating is greater than the surface roughness of the first protective layer, there will be a certain gap between the protective coating and the supporting component of the folding screen terminal when they are attached to each other. In this way, the possibility of enclosed air bubbles between the two can be reduced, so that when the protective coating and the supporting component are separated from each other, there will be no abnormal sound generated when the air bubbles are released, which is conducive to improving the user experience.

[0008] In a possible implementation of the first aspect of the present application, the first protective layer includes a first area and a second area located on both sides of the first area, and the distribution direction of the first area and the second area is the same as the distribution direction of the bending area and the non-bending area; the protective coating covers the second area. Under this structure, on the one hand, materials can be saved to reduce costs. On the other hand, this structure can be applied to a folding screen terminal with an external folding display screen, and the first area of ​​the first protective layer can be used to bond and fix to the supporting assembly, which is beneficial to improve the reliability of the overall structure.

[0009] In a possible implementation of the first aspect of the present application, the first protective layer includes a first area and a second area located on both sides of the first area, and the distribution direction of the first area and the second area is the same as the distribution direction of the bending area and the non-bending area; the protective coating covers the first area. Under this structure, on the one hand, materials can be saved to reduce costs. On the other hand, this structure can be applied to a folding screen terminal with an inner folding display screen, and the two second areas of the first protective layer can be respectively bonded and fixed to the supporting assembly, which is beneficial to improve the reliability of the overall structure.

[0010] In a possible implementation of the first aspect of the present application, the protective coating covers the first protective layer. Under this structure, it can be ensured that the first protective layer does not contact the supporting component of the folding screen terminal, so as to further reduce the risk of abnormal noise during the rotation of the folding screen terminal.

[0011] In a possible implementation manner of the first aspect of the present application, the roughness of the surface of the protective coating layer away from the first protective layer is: 0.4<Ra<5.

[0012] In a possible implementation manner of the first aspect of the present application, the roughness of the surface of the protective coating layer away from the first protective layer is: 0.5<Ra<1.5.

[0013] In a possible implementation manner of the first aspect of the present application, the dynamic friction coefficient of the surface of the protective coating layer away from the first protective layer is 0-1.

[0014] In a possible implementation manner of the first aspect of the present application, the protective coating is an ink layer, and the material of the ink layer includes acrylic acid, epoxy resin or polyurethane.

[0015] In a possible implementation of the first aspect of the present application, the display module further includes a second protective layer, the second protective layer is disposed on a side of the display screen away from the supporting layer, and the second protective layer covers a display surface of the display screen.

[0016] In a second aspect, a folding screen terminal is provided, which includes a first shell, a second shell, a hinge mechanism and a display module. The hinge mechanism is arranged between the first shell and the second shell, and the first shell and the second shell are both rotatably connected to the hinge mechanism. The display module includes a folding screen assembly and a protective coating, and the folding screen assembly is supported on the first shell, the second shell and the hinge mechanism; the protective coating is arranged between the folding screen assembly and the hinge mechanism, and the protective coating is applied to the folding screen assembly. Among them, the roughness of the surface of the protective coating facing the hinge mechanism is greater than the roughness of the surface of the folding screen assembly facing the hinge mechanism.

[0017] The folding screen terminal provided in the second aspect of the present application is provided with a protective coating on the side of the folding screen assembly facing the hinge mechanism, that is, the protective coating can be bonded to the hinge mechanism. Since the surface roughness of the protective coating is greater than the surface roughness of the folding screen assembly, there will be a certain gap between the protective coating and the hinge mechanism when they are bonded to each other. In this way, the possibility of a closed air bubble between the two can be reduced, so that when the protective coating and the hinge mechanism are separated from each other, there will be no abnormal sound generated when the air bubble is released, which is conducive to improving the user experience.

[0018] In a possible implementation of the second aspect of the present application, the protective coating includes a first sub-coating and a second sub-coating, the first sub-coating and the second sub-coating are arranged at intervals along the distribution direction of the first shell and the second shell, and the folding screen assembly exposed between the first sub-coating and the second sub-coating is fixedly connected to the hinge mechanism. Under this structure, the protective coating only fits with a local area of ​​the hinge mechanism, which is conducive to saving materials and reducing costs.

[0019] In a possible implementation of the second aspect of the present application, the hinge mechanism includes a center beam, a first door panel, and a second door panel. The folding screen assembly exposed between the center beam and the first sub-coating and the second sub-coating is bonded and fixed. The first door panel is arranged on one side of the center beam, one end of the first door panel is rotatably connected to the center beam, and the other end of the first door panel is fixedly connected to the first shell; the first sub-coating is supported on the first door panel. The second door panel is arranged on the other side of the center beam, one end of the second door panel is rotatably connected to the center beam, and the other end of the second door panel is fixedly connected to the second shell; the second sub-coating is supported on the second door panel. Among them, the first door panel and the second door panel can rotate between a folded state and an unfolded state. When the first door panel and the second door panel are in a folded state, the folding screen assembly is bent, and the first shell and the second shell are located in the folding screen assembly.

[0020] In this way, the probability of airtight air bubbles between the first sub-coating and the first door panel, and between the second sub-coating and the second door panel can be reduced, thereby reducing the risk of abnormal noise during the rotation of the terminal. In addition, the folding screen assembly is bonded and fixed to the middle beam, the first shell and the second shell, which is conducive to further improving the reliability of the overall structure.

[0021] In a possible implementation of the second aspect of the present application, the protective coating covers the middle area of ​​the folding screen assembly along the distribution direction of the first shell and the second shell. In this structure, the protective coating only covers the middle area of ​​the folding screen assembly, which is conducive to saving materials and reducing costs.

[0022] In a possible implementation of the second aspect of the present application, the hinge mechanism includes a base, a first swing arm and a second swing arm. The protective coating is located between the base and the folding screen assembly. The first swing arm is disposed on one side of the base, one end of the first swing arm is rotatably connected to the base, and the other end of the first swing arm is fixedly connected to the first shell. The second swing arm is disposed on the other side of the base, one end of the second swing arm is rotatably connected to the base, and the other end of the second swing arm is fixedly connected to the second shell. The first swing arm and the second swing arm are capable of rotating between a folded state and an unfolded state, and when the swing arm and the second swing arm are in the folded state, the folding screen assembly is bent, and the folding screen assembly is located between the first shell and the second shell.

[0023] In this way, the probability of air bubbles between the protective coating and the base can be reduced, thereby reducing the risk of abnormal noise during the rotation of the terminal. In addition, the folding screen assembly is fixed by bonding the first shell, the second shell, the first swing arm and the second swing arm, which is conducive to improving the reliability of the entire structure.

[0024] In a possible implementation of the second aspect of the present application, the protective coating covers the area where the folding screen assembly and the hinge mechanism are opposite. In this structure, the hinge mechanism can only be attached to the protective coating, thereby further reducing the risk of air bubbles between the folding screen assembly and the hinge mechanism, which is conducive to further reducing the risk of abnormal noise in the terminal.

[0025] In a possible implementation of the second aspect of the present application, the roughness of the surface of the protective coating away from the folding screen assembly is: 0.4<Ra<5.

[0026] In a possible implementation of the second aspect of the present application, the roughness of the surface of the protective coating away from the folding screen assembly is: 0.5<Ra<1.5.

[0027] In a possible implementation manner of the second aspect of the present application, the dynamic friction coefficient of the surface of the protective coating layer away from the first protective layer is 0-1.

[0028] In a possible implementation manner of the second aspect of the present application, the protective coating is an ink layer, and the material of the ink layer includes acrylic acid, epoxy resin or polyurethane. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A structural diagram of a foldable screen terminal provided in an embodiment of the present application;

[0030] Figure 2 A partial structural diagram of a display module provided in an embodiment of the present application;

[0031] Figure 3 A partial structural diagram of a foldable screen terminal provided in an embodiment of the present application;

[0032] Figure 4 A structural diagram of a folding screen terminal in a folded state provided in an embodiment of the present application;

[0033] Figure 5 A partial structural diagram of a folding screen terminal in a folded state provided by an embodiment of the present application;

[0034] Figure 6 A partial structural cross-sectional view of the first protective layer and the hinge mechanism of a folding screen terminal provided by the related technology;

[0035] Figure 7 A structural diagram of a display module is provided for an embodiment of the present application;

[0036] Figure 8 for Figure 7 The assembly structure diagram of the display module and the supporting components provided;

[0037] Fig. 9 A microstructure diagram of the surface of the first protective layer provided in an embodiment of the present application;

[0038] Fig.10 A microstructure diagram of the protective coating surface provided in the embodiment of the present application;

[0039] Fig.11 A schematic diagram of the structure after the protective coating provided in the embodiment of the present application is bonded to the shaft mechanism;

[0040] Fig.12 A partial structural diagram of another folding screen terminal provided in an embodiment of the present application;

[0041] Fig.13 A partial structural diagram of another protective coating of a foldable screen terminal provided in an embodiment of the present application;

[0042] Fig.14 A partial structural diagram of another protective coating of a foldable screen terminal provided in an embodiment of the present application;

[0043] Fig.15 A partial structural diagram of another hinge mechanism of a foldable screen terminal provided in an embodiment of the present application in an unfolded state;

[0044] Fig.16 for Fig.15 A partial structural diagram of the folding screen terminal provided in a folded state;

[0045] Fig.17 A structural diagram of another folding screen terminal provided in an embodiment of the present application;

[0046] Fig.18 for Fig.17 A main view of the foldable screen terminal in a folded state is provided;

[0047] Fig.19 for Fig.17 The partial assembly structure diagram of the display module and the hinge mechanism of the provided folding screen terminal;

[0048] Fig. 20 for Fig.17 A partial structural diagram of another protective coating of a foldable screen terminal is provided;

[0049] Fig.21 for Fig.17 A partial structural diagram of another protective coating for a foldable screen terminal is provided.

[0050] Figure numerals: 10-folding screen terminal; 100-display module; 110-display screen; 111-first display area; 112-second display area; 113-third display area; 120-first protective layer; 121-first area; 122-second area; 130-second protective layer; 140-support layer; 141-bending area; 142-non-bending area; 142a-first non-bending area; 142b-second non-bending area; 150-protective coating; 151-first sub-coating; 152-second sub-coating; 200-support assembly; 210-first shell; 210a-first sticker mating surface; 220-second shell; 220a-second fitting surface; 230-rotating shaft mechanism; 230a-third fitting surface; 231-middle beam; 231a-first sub-region; 231b-second sub-region; 232-first door panel; 232a-first sub-door panel; 232b-second sub-door panel; 233-second door panel; 233a-third sub-door panel; 233b-fourth sub-door panel; 234-base; 235-first swing arm; 235a-third sub-region; 235b-fourth sub-region; 236-second swing arm; 236a-fifth sub-region; 236b-sixth sub-region. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0052] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0053] In addition, in the present application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the changes in the orientation of the components in the drawings.

[0054] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0055] The embodiment of the present application provides a folding screen terminal, which may be an electronic device with a folding screen, for example, a folding screen mobile phone. The folding screen mobile phone may be a mobile phone with an external folding display screen, or may be a mobile phone with an internal folding display screen. The embodiment of the present application is described by taking a mobile phone with an external folding display screen as an example.

[0056] Specifically, see Figure 1 , Figure 1 A structural diagram of a foldable screen terminal 10 provided in an embodiment of the present application. The foldable screen terminal 10 may include a display module 100 and a support assembly 200. The display module 100 is supported and attached to the support assembly 200. The support assembly 200 can drive the display module 100 to rotate between a folded state and an unfolded state. It is understandable that the figure only schematically shows some components included in the foldable screen terminal 10, and the actual shape, actual size, actual position and actual structure of these components are not limited by the structure shown in the figure.

[0057] To facilitate the description of the following embodiments, an XYZ coordinate system is established, and it is defined that when the foldable screen terminal 10 is in the unfolded state, the width direction of the foldable screen terminal 10 is the X-axis direction, the length direction of the foldable screen terminal 10 is the Y-axis direction, and the thickness direction of the foldable screen terminal 10 is the Z-axis direction. It can be understood that the coordinate system of the foldable screen terminal 10 can be flexibly set according to actual needs, and this application only gives an example, which cannot be considered as a special limitation of this application.

[0058] See also Figure 2 , Figure 2 The partial structural diagram of the display module 100 provided in the embodiment of the present application. The display module 100 may include a display screen 110, a first protective layer 120 and a second protective layer 130. The first protective layer 120 is stacked on the inner side of the display screen 110, that is, the side surface facing the support assembly 200. The second protective layer 130 is stacked on the outer side of the display screen 110, that is, the display surface of the display screen 110. Both the second protective layer 130 and the first protective layer 120 can effectively protect the display screen 110 to prevent the display screen 110 from being damaged.

[0059] The display screen 110 may include a first display area 111, a second display area 112 and a third display area 113, and the third display area 113 is arranged between the first display area 111 and the second display area 112. When the display module 100 is folded, the third display area 113 of the display screen 110 is bent, and the first display area 111 and the second display area 112 are arranged in opposite directions. At least the third display area 113 of the display screen 110 can be made of a flexible material, and the first display area 111 and the second display area 112 can be made of a flexible material, or a rigid material, or partly made of a flexible material and partly made of a rigid material. Therefore, the present application does not make any special limitation on this.

[0060] Among them, the above-mentioned display screen 110 can be an organic light-emitting diode (OLED) display screen, an active matrix organic light-emitting diode or an active matrix organic light-emitting diode (AOLED) display screen, a mini light-emitting diode (ini organic light-eitting diode) display screen, a micro light-emitting diode (icro organic light-eitting diode) display screen, a micro organic light-emitting diode (icro organic light-eitting diode) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0061] In some embodiments, please refer to Figure 2The display module 100 may further include a support layer 140, which is disposed between the display screen 110 and the first protective layer 120. The support layer 140 can support the display screen 110 to enhance the overall strength of the display module 100. Exemplarily, the support layer 140 may be made of stainless steel. The support layer 140 may include a bending area 141 and two non-bending areas 142 (including a first non-bending area 142a and a second non-bending area 142b) disposed on both sides of the bending area 141. The first non-bending area 142a is bonded and fixed to the first display area 111, the second non-bending area 142b is bonded and fixed to the second display area 112, and the bending area 141 is bonded and fixed to the third display area 113.

[0062] To facilitate the bending area 141 of the support layer 140 to bend together with the third display area 113 of the display screen 110, a plurality of through holes may be provided on the bending area 141, and the plurality of through holes are regularly arranged in an array so that the bending area 141 forms a hollow structure (also called a bamboo book structure), thereby facilitating the bending area 141 of the support layer 140 to bend.

[0063] The first protective layer 120 may cover the entire support layer 140, that is, the non-bending area 142 and the bending area 141 of the support layer 140. Alternatively, the first protective layer 120 may only cover the bending area 141 of the support layer 140, thereby effectively protecting the hollow structure of the bending area 141. This embodiment is described by taking the example that the first protective layer 120 only covers the bending area 141 of the support layer 140.

[0064] See also Figure 3 , Figure 3A partial structural diagram of a folding screen terminal 10 provided in an embodiment of the present application. The above-mentioned support assembly 200 may include a first shell 210, a second shell 220 and a hinge mechanism 230. The hinge mechanism 230 is connected between the first shell 210 and the second shell 220. The first shell 210 has a first fitting surface 210a, and the first non-bending area 142a of the support layer 140 is supported and attached to the first fitting surface 210a (for example, the two can be bonded and fixed by a glue layer), that is, the first display area 111 of the display screen 110 is stacked and arranged on the side of the first non-bending area 142a away from the first shell 210. The second shell 220 has a second fitting surface 220a, and the second non-bending area 142b of the support layer 140 is supported and attached to the second fitting surface 220a (for example, the two can be bonded and fixed by a glue layer), that is, the second display area 112 of the display screen 110 is stacked and arranged on the side of the second non-bending area 142b away from the second shell 220. The hinge mechanism 230 has a third bonding surface 230a, and the first protective layer 120 is supported and bonded to the third bonding surface 230a, that is, the bending area 141 of the supporting layer 140 and the third display area 113 of the display screen 110 are stacked on the side of the protective coating 150 away from the hinge mechanism 230. The first shell 210 and the second shell 220 are rotatably connected through the hinge mechanism 230, so that the folding screen terminal 10 can rotate between the above-mentioned unfolded state and the folded state.

[0065] When the folding screen terminal 10 is in the unfolded state. Figure 1 , Figure 2 and Figure 3 All indicate that the folding screen terminal 10 or the display module 100 is in an unfolded state. The first laminating surface 210a, the second laminating surface 220a, and the third laminating surface 230a are in the same plane, so that the folding screen assembly is fully unfolded and the flatness of the display screen 110 can be ensured. In this state, the large-screen display of the folding screen terminal 10 can be achieved, which can bring a better user experience. For example, when the user watches a movie, the terminal can be unfolded and used for viewing on a large screen, thereby obtaining a better viewing experience.

[0066] When the foldable screen terminal 10 is in the folded state. Figure 4 and Figure 5 , Figure 4 This is a structural diagram of the folding screen terminal 10 provided in an embodiment of the present application in a folded state, Figure 5A partial structural diagram of a folding screen terminal 10 in a folded state provided in an embodiment of the present application. The first display area 111 and the second display area 112 of the above-mentioned display screen 110 are opposite to each other, that is, the first display area 111 and the second display area 112 are facing opposite directions, respectively, and the third display area 113 of the display screen 110 is in a bent state, and the support assembly 200 is located between the first display area 111 and the second display area 112. In this state, the folding screen terminal 10 only uses the first display area 111 or the second display area 112 of the display screen 110 to display images, that is, the user can use a small screen for operation. For example, when a user takes public transportation, because one hand is required to hold the handrail, the terminal can only be held with one hand. Therefore, the terminal can be folded at this time to reduce the width of the terminal, so as to facilitate one-handed operation, which is conducive to improving the user experience.

[0067] In this way, the use state of the folding screen terminal 10 can be increased to be suitable for different application scenarios. Users can freely choose the use state of the terminal according to different application scenarios, which is conducive to enabling users to obtain a better use experience.

[0068] However, when the foldable screen terminal 10 rotates between the folded state and the unfolded state, there may be a local separation or relative sliding between the first protective layer 120 and the third bonding surface 230a of the hinge mechanism 230. Since the first protective layer 120 is generally made of TPU (Thermoplastic Urethane) material, which is relatively soft, and the hinge mechanism 230 is a structural component, and its material is relatively hard; when the two are bonded to each other, please refer to Figure 6 , Figure 6 The partial structural cross-sectional view of the first protective layer 120 and the hinge mechanism 230 of the folding screen terminal 10 provided in the related art shows that a local enclosed space, i.e., an air bubble, may be formed between the first protective layer 120 and the third bonding surface 230a. Therefore, when the first protective layer 120 and the third bonding surface 230a separate from each other or slide relative to each other, so that the air bubble is released, the air bubble will vibrate at the moment of release due to the different pressures inside and outside the air bubble, resulting in abnormal noise, which affects the user experience.

[0069] To solve the above problems, please refer to Figure 7 and Figure 8 , Figure 7 A structural diagram of a display module 100 is provided for an embodiment of the present application. Figure 8 for Figure 7The assembly structure diagram of the display module 100 and the support assembly 200 is provided, and the display module 100 can be applied to the above-mentioned folding screen terminal 10. Among them, the display module 100 may include a folding screen assembly consisting of the above-mentioned display screen 110, the first protective layer 120, the second protective layer 130 and the support layer 140; the folding screen assembly is supported on the above-mentioned support assembly 200, and its specific connection structure is the same as the above-mentioned structure, so it will not be described repeatedly.

[0070] In addition, the display module 100 provided in the embodiment of the present application may further include a protective coating 150, which is applied to the surface of the folding screen assembly facing the support assembly 200. Specifically, the protective coating 150 covers at least a partial area of ​​the first protective layer 120, that is, the protective coating 150 is located between the first protective layer 120 and the third fitting surface 230a of the hinge mechanism 230. Among them, the roughness of the surface of the protective coating 150 away from the first protective layer 120 (that is, the surface of the protective coating 150 facing the third fitting surface 230a) is the first roughness, and the roughness of the surface of the first protective layer 120 facing the protective coating 150 is the second roughness, and the first roughness is greater than the second roughness.

[0071] The display module 100 provided in the embodiment of the present application is provided with a protective coating 150 on the surface of the first protective layer 120 facing the third bonding surface 230a, that is, the protective coating 150 can be bonded to or separated from the third bonding surface 230a. Fig. 9 and Fig.10 , Fig. 9 The microstructure diagram of the surface of the first protective layer 120 provided in the embodiment of the present application is as follows: Fig.10 The microstructure diagram of the surface of the protective coating 150 provided in the embodiment of the present application shows that the first roughness of the protective coating 150 is greater than the second roughness of the first protective layer 120, that is, the surface of the protective coating 150 is rougher. The surface roughness refers to the formation of an uneven structure on the surface, and the rougher the surface, the greater the difference between the highest end and the lowest point of the uneven structure on the surface.

[0072] In this way, please refer to Fig.11 , Fig.11A schematic diagram of the structure after the protective coating 150 and the rotating shaft mechanism 230 are bonded to each other provided in the embodiment of the present application. Since the surface roughness of the protective coating 150 is relatively large, when the protective coating 150 and the third bonding surface 230a are bonded to each other, the highest point on the surface of the protective coating 150 and the third bonding surface 230a of the rotating shaft mechanism 230 abut against each other, and there is a gap between the lowest point on the surface of the protective coating 150 and the third bonding surface 230a. That is, when the protective coating 150 with a large surface roughness and the third bonding surface 230a are bonded to each other, there will be a gap between the two, and these gaps can form a channel for air circulation, so that when the protective coating 150 and the third bonding surface 230a are bonded to each other, it can avoid the formation of a closed space, i.e., air bubbles, between the two. Furthermore, when the protective body layer and the third bonding surface 230a are separated from each other or slide relatively, air vibration will not be caused by releasing the enclosed air bubbles, and no abnormal sound will be generated, which is conducive to improving the user experience.

[0073] In some embodiments, the material of the protective coating 150 may include, but is not limited to, acrylic acid, epoxy resin, and polyurethane, i.e., ink. In addition, the protective layer may be coated on the surface of the first protective layer 120 by spraying, silk-screen printing, pad printing, electroplating, stamping, pouring, coating, or transfer printing.

[0074] The first roughness Ra of the protective coating 150 made of the above materials can be between 0.4 and 5. In some examples, the first roughness Ra can be between 0.5 and 1.5. For example, the first roughness Ra can be 0.6, 0.61, 0.7, 0.8, 0.81, 1, 1.1, 1.2, 1.3, 1.4, 1.41, etc.

[0075] In addition, the dynamic friction coefficient of the protective coating 150 may be 0-1, for example, the dynamic friction coefficient of the protective coating 150 may be 0.1, 0.2, 0.31, 0.42, 0.55, 0.7, etc. This is to reduce the friction force when the protective coating 150 and the third bonding surface 230a slide relative to each other, which is helpful to reduce the risk of damage caused by friction during the relative sliding process between the two.

[0076] Exemplarily, the first protective layer 120 with protective coatings 150 (respectively model A and model B) produced by different manufacturers printed on it and the surface of the first protective layer 120 without the protective coating 150 were tested, and the test results of various parameters are shown in Table 1.

[0077] Table 1

[0078]

[0079] It can be seen from the parameter values ​​shown in Table 1 that when the protective coating 150 of type A and type B is coated on the first protective layer 120, the roughness of the protective coating 150 is greater than the roughness of the first protective layer 120. This is beneficial to reduce the probability of forming closed air bubbles between the third bonding surface 230a and the protective coating 150 when the two are bonded to each other.

[0080] Furthermore, the dynamic friction coefficient and the static friction coefficient of the protective coating 150 are both relatively small, which is beneficial to reducing the friction force when the protective coating 150 and the third bonding surface 230 a slide against each other, thereby reducing the risk of damage to the display module 100 .

[0081] In addition, after the protective coating 150 is coated on the first protective layer 120, it is helpful to improve the overall tension force, thereby helping to further reduce the risk of damage to the display module 100 due to relative sliding between the third bonding surface 230a and the protective coating 150 during the rotation of the folding screen terminal 10.

[0082] In addition, after the protective coating 150 is applied, the water drop angle of the protective coating 150 can be reduced and the adhesion of the protective coating 150 can be increased, which can improve the performance of the display module 100.

[0083] Based on this, the above is an example of the coating method of the protective coating 150 and the protective coating 150 formed of different materials. The following is an example of the coverage area of ​​the protective coating 150 on the first protective layer 120.

[0084] In order to improve the connection stability between the display module 100 and the support assembly 200, the first shell 210 of the support assembly 200 is bonded and fixed to the first non-bending area 142a of the support layer 140, and the second shell 220 is bonded and fixed to the second non-bending area 142b of the support layer 140. The hinge mechanism 230 of the support assembly 200 provided in the embodiment of the present application can also be bonded and fixed to a partial area of ​​the display module 100.

[0085] Specifically, see Fig.12 , Fig.12 A partial structural diagram of another folding screen terminal 10 provided in an embodiment of the present application. The above-mentioned hinge mechanism 230 may include a central beam 231, a first door panel 232, and a second door panel 233. The first door panel 232 and the second door panel 233 are respectively arranged on both sides of the central beam 231, and the first door panel 232 and the second door panel 233 are both rotatably connected to the central beam 231. The first door panel 232 is fixedly connected to the above-mentioned first shell 210, and the second door panel 233 is fixedly connected to the above-mentioned second shell 220. The first door panel 232 and the second door body can drive the first shell 210 and the second shell 220 to rotate between a folded state and an unfolded state.

[0086] For some possible embodiments, please refer to Fig.12 The protective coating 150 can cover the entire first protective layer 120, and the protective coating 150 is bonded and fixed to at least the middle area of ​​the middle beam 231. That is, the middle area between the display module 100 and the hinge mechanism 230 is bonded and fixed, so that when the folding screen terminal 10 rotates from the folded state to the unfolded state, the middle area of ​​the display module 100 can be prevented from arching in the direction away from the hinge mechanism 230, which is conducive to ensuring the flatness of the display module 100 when the terminal is in the unfolded state.

[0087] It should be noted that, since the third fitting surface 230a of the hinge mechanism 230 forms an approximately arc surface structure when the folding screen terminal 10 is in the folded state, the edges of the middle beam 231 close to the first door panel 232 and the second door panel 233 will be separated from the protective coating 150. Therefore, only a part of the middle beam 231 may be bonded and fixed to the display module 100, or the entire surface of the middle beam 231 facing the display module 100 may be bonded and fixed to the display module 100. This application does not specifically limit this.

[0088] In some other possible embodiments, the protective coating 150 may also only cover a portion of the first protective layer 120. Fig.13 , Fig.13 A partial structural diagram of another protective coating 150 of a folding screen terminal 10 provided in an embodiment of the present application. The first protective layer 120 may include a first region 121 and second regions 122 located on both sides of the first region 121, and the directions in which the second regions 122, the first regions 121 and the second regions 122 are sequentially distributed are the same as Figure 3 The first housing 210 , the rotating shaft mechanism 230 , and the second housing 220 are sequentially distributed in the same direction, that is, along the X-axis direction.

[0089] Furthermore, the protective coating 150 may include a first sub-coating 151 and a second sub-coating 152, the first sub-coating 151 covers one of the two second areas 122, and the second sub-coating 152 covers the other of the two second areas 122, the first area 121 is bonded and fixed to the middle beam 231 of the hinge mechanism 230, that is, the folding screen assembly exposed between the first sub-coating 151 and the second sub-coating 152 is bonded and fixed to the middle beam 231.

[0090] In addition, the first area 121 of the first protective layer 120 may cover the entire surface of the middle beam 231 facing the display module 100, or may only cover the middle area of ​​the middle beam 231. In the case where the first area 121 only covers the middle area of ​​the middle beam 231, please refer to Fig.14 , Fig.14 A partial structural diagram of another protective coating 150 of a folding screen terminal provided in an embodiment of the present application, wherein the surface of the middle beam 231 facing the display module 100 may include a first sub-region 231a and two second sub-regions 231b arranged on both sides of the first sub-region 231a.

[0091] At this time, the first sub-region 231a is bonded and fixed to the first region 121 of the first protective layer 120, a second region 122 of the first protective layer 120 covers the first door panel 232 and a second sub-region 231b on the center beam 231, and another second region 122 of the first protective layer 120 covers the second door panel 233 and another second sub-region 231b on the center beam 231, that is, the first sub-coating 151 can be bonded to the first door panel 232 and a second sub-region 231b of the center beam 231, and the second sub-coating 152 can be bonded to the second door panel 233 and another second sub-region 231b on the center beam 231.

[0092] In this way, the protective coating 150 may not be applied to the area where the first protective layer 120 needs to be bonded and fixed to the middle beam 231 (i.e., the first area 121), thereby saving materials and reducing costs. Therefore, the present application does not specifically limit the area size of the first area 121 and the second area 122 of the first protective layer 120.

[0093] In some other possible embodiments, see Fig.15 and Fig.16 , Fig.15 This is a partial structural diagram of another hinge mechanism 230 of the folding screen terminal 10 provided in an embodiment of the present application in an unfolded state. Fig.16 for Fig.15 A partial structural diagram of the folding screen terminal 10 in a folded state is provided. The above-mentioned first door panel 232 may include a first sub-door panel 232a and a second sub-door panel 232b, and the second door panel 233 may include a third sub-door panel 233a and a fourth sub-door panel 233b. Among them, the first sub-door panel 232a and the third sub-door panel 233a are respectively rotatably connected to the middle beam 231, the second sub-door panel 232b is fixedly connected to the first shell 210, and the fourth sub-door panel 233b is fixedly connected to the second shell 220. The first sub-door panel 232a is slidably connected to the second sub-door panel 232b, and the third sub-door panel 233a is slidably connected to the fourth sub-door panel 233b, and the sliding direction between the first sub-door panel 232a and the second sub-door panel 232b, and the sliding direction between the third sub-door panel 233a and the fourth sub-door panel 233b are perpendicular to the length direction of the middle beam 231.

[0094] When the terminal rotates between the unfolded state and the folded state, the first sub-door plate 232a can slide relative to the second sub-door plate 232b, and the third sub-door plate 233a can slide relative to the fourth sub-door plate 233b. Therefore, both the first sub-door plate 232a and the third sub-door plate 233a can slide relative to the protective coating 150.

[0095] At this time, since the protective coating 150 provided in the embodiment of the present application has good parameters, such as high roughness, low dynamic friction coefficient, good tension, etc. Therefore, when relative sliding occurs between the first sub-door plate 232a and the third sub-door plate 233a and the protective coating 150, the risk of closed air bubbles generated between the two and damage caused by friction can be reduced.

[0096] The above is an example of a mobile phone with an external folding display screen 110. The following is an example of a mobile phone with an internal folding display screen 110. Fig.17 and Fig.18 , Fig.17 This is a structural diagram of another folding screen terminal 10 provided in an embodiment of the present application. Fig.18 for Fig.17 The foldable screen terminal 10 is provided in a front view in a folded state. The foldable screen terminal 10 also includes the first housing 210, the second housing 220, the hinge mechanism 230 and the display module 100. The same components will not be described repeatedly.

[0097] In this embodiment, the upper rotating shaft mechanism 230 can drive the first shell 210 and the second shell 220 to rotate, so that the folding screen terminal 10 can rotate between the unfolded state and the folded state. When the folding screen terminal 10 is in the unfolded state, the display module 100 is fully unfolded to realize the large screen display of the folding screen terminal 10 (such as Fig.17 When the folding screen terminal 10 is in the folded state, the first display area 111 and the second display area 112 of the display screen 110 are opposite to each other, and the third display area 113 of the display screen 110 is in a bent state. The display module 100 is located between the first shell 210 and the second shell 220, so that the display module 100 can be effectively protected (as shown in FIG. Fig.18 shown).

[0098] Among them, see Fig.19 , Fig.19 for Fig.17A partial assembly structure diagram of the display module 100 and the hinge mechanism 230 of the folding screen terminal 10 is provided. The above-mentioned display module 100 includes a display screen 110, a first protective layer 120, a second protective layer 130 and a support layer 140. The first protective layer 120 at least covers the bending area 141 of the support layer 140. The hinge mechanism 230 may include a base 234, a first swing arm 235 and a second swing arm 236. The first swing arm 235 and the second swing arm 236 are respectively located on both sides of the base 234, and are both rotatably connected to the base 234. One end of the first swing arm 235 away from the base 234 is fixedly connected to the first shell 210, and one end of the second swing arm 236 away from the base 234 is fixedly connected to the second shell 220.

[0099] For some possible embodiments, please refer to Fig.19 The protective coating 150 can cover the entire first protective layer 120, and the protective coating 150 is bonded and fixed to at least a portion of the first swing arm 235 and the second swing arm 236. That is, the display module 100 is bonded and fixed to at least a portion of the first housing 210, the second housing 220, and the first swing arm 235 and the second swing arm 236 of the hinge mechanism 230, so as to prevent the display module 100 and the support assembly 200 from being separated from each other, which is beneficial to improving the reliability of the overall structure.

[0100] In some other possible embodiments, see Fig. 20 , Fig. 20 for Fig.17 A partial structural diagram of another protective coating 150 of the folding screen terminal 10 is provided, and the protective coating 150 may also only cover a partial area of ​​the first protective layer 120. Specifically, the first protective layer 120 may include the above-mentioned first area 121 and second areas 122 located on both sides of the first area 121. The protective coating 150 covers the first area 121 of the first protective layer 120, one of the two second areas 122 of the first protective layer 120 is bonded and fixed to the first swing arm 235, and the other of the two second areas 122 is bonded and fixed to the second swing arm 236. That is, the protective coating 150 is only applied to the area on the first protective layer 120 opposite to the base 234.

[0101] In addition, the second area 122 of the first protective layer 120 may cover the entire surface of the first swing arm 235 and the second swing arm 236 facing the display module 100, or may only cover a partial area close to the first shell 210 and the second shell 220. In the case where the second area 122 only covers a partial area of ​​the first swing arm 235 and the second swing arm 236, please refer to Fig.21 , Fig.21 for Fig.17A partial structural diagram of another protective coating 150 of a foldable screen terminal 10 is provided. The surface of the first swing arm 235 facing the display module 100 includes a third sub-region 235a and a fourth sub-region 235b, the third sub-region 235a is located on a side close to the first housing 210, and the third sub-region 235a is bonded and fixed to a second region 122 of the first protective layer 120.

[0102] Correspondingly, the surface of the second swing arm 236 facing the display module 100 includes a fifth sub-region 236a and a sixth sub-region 236b, the fifth sub-region 236a is located on the side close to the second shell 220, and the fifth sub-region 236a is bonded and fixed to the other second region 122 of the first protective layer 120. The first region 121 of the first protective layer 120 can cover the surface of the base 234 facing the display module 100, as well as the fourth sub-region 235b of the first swing arm 235 and the sixth sub-region 236b of the second swing arm 236. That is, the protective coating 150 can be mutually attached to the base 234 and the fourth sub-region 235b of the first swing arm 235 and the sixth sub-region 236b of the second swing arm 236.

[0103] In this way, the area on the first protective layer 120 that needs to be bonded and fixed to the rotating mechanism (i.e., the third sub-area 235a of the first swing arm 235 and the fifth sub-area 236a of the second swing arm 236) does not need to be coated with the protective coating 150, thereby saving materials and reducing costs. Therefore, the present application does not specifically limit the area size of the first area 121 and the second area 122 of the first protective layer 120.

[0104] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0105] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A display module, applied to a folding screen terminal, the folding screen terminal comprising a hinge mechanism, characterized in that: The display module comprises: A display screen having a display surface; A support layer, stacked on a side of the display screen away from the display surface, the support layer comprising a bending area and non-bending areas located on both sides of the bending area; A first protective layer, stacked on a side of the support layer away from the display screen, and the first protective layer at least covers the bending area; A protective coating layer is applied to a side of the first protective layer away from the supporting layer, and covers at least a portion of the first protective layer, wherein the protective coating layer is used to fit the rotating shaft mechanism; The roughness of the surface of the protective coating layer away from the first protective layer is greater than the roughness of the surface of the first protective layer facing the protective coating layer.

2. The display module according to claim 1, characterized in that: The first protective layer includes a first area and second areas located on both sides of the first area, and the distribution direction of the first area and the second area is the same as the distribution direction of the bending area and the non-bending area; the protective coating covers the second area.

3. The display module according to claim 1, characterized in that: The first protective layer includes a first area and a second area located on both sides of the first area. The distribution direction of the first area and the second area is the same as the distribution direction of the bending area and the non-bending area. The protective coating covers the first area.

4. The display module according to claim 1, characterized in that: The protective coating layer covers the first protective layer.

5. The display module according to any one of claims 1 to 4, characterized in that: The roughness of the surface of the protective coating layer away from the first protective layer is: 0.4<Ra<5.

6. The display module according to any one of claims 1 to 4, characterized in that: The roughness of the surface of the protective coating layer away from the first protective layer is: 0.5<Ra<1.

5.

7. The display module according to any one of claims 1 to 4, characterized in that: The dynamic friction coefficient of the surface of the protective coating layer away from the first protective layer is 0-1.

8. The display module according to any one of claims 1 to 4, characterized in that: The protective coating is an ink layer, and the material of the ink layer includes acrylic acid, epoxy resin or polyurethane.

9. The display module according to any one of claims 1 to 4, characterized in that: The display module further includes a second protective layer, which is arranged on a side of the display screen away from the supporting layer, and covers the display surface of the display screen.

10. A folding screen terminal, characterized in that: include: a first shell; a second shell; A rotating shaft mechanism is disposed between the first shell and the second shell, and the first shell and the second shell are both rotatably connected to the rotating shaft mechanism; A display module, comprising a folding screen assembly and a protective coating, wherein the folding screen assembly is supported on the first shell, the second shell and the hinge mechanism; the protective coating is arranged between the folding screen assembly and the hinge mechanism, and the protective coating is coated on the folding screen assembly; Among them, the roughness of the surface of the protective coating facing the hinge mechanism is greater than the roughness of the surface of the folding screen assembly facing the hinge mechanism.

11. The folding screen terminal according to claim 10, characterized in that: The protective coating includes a first sub-coating and a second sub-coating, and the first sub-coating and the second sub-coating are arranged at intervals along the distribution direction of the first shell and the second shell, and the folding screen assembly exposed between the first sub-coating and the second sub-coating is fixedly connected to the hinge mechanism.

12. The folding screen terminal according to claim 11, characterized in that: The rotating shaft mechanism comprises: A middle beam, wherein the middle beam is bonded and fixed to the folding screen assembly exposed between the first sub-coating and the second sub-coating; A first door panel is arranged on one side of the middle beam, one end of the first door panel is rotatably connected to the middle beam, and the other end of the first door panel is fixedly connected to the first shell; the first sub-coating is supported on the first door panel; A second door panel is arranged on the other side of the middle beam, one end of the second door panel is rotatably connected to the middle beam, and the other end of the second door panel is fixedly connected to the second shell; the second sub-coating is supported on the second door panel; Wherein, the first door panel and the second door panel are capable of rotating between a folded state and an unfolded state. When the first door panel and the second door panel are in the folded state, the folding screen assembly is bent, and the first shell and the second shell are located inside the folding screen assembly.

13. The folding screen terminal according to claim 10, characterized in that: Along the distribution direction of the first shell and the second shell, the protective coating covers the middle area of ​​the folding screen assembly.

14. The folding screen terminal according to claim 13, characterized in that: The rotating shaft mechanism comprises: A base, wherein the protective coating is located between the base and the folding screen assembly; A first swing arm is disposed on one side of the base, one end of the first swing arm is rotatably connected to the base, and the other end of the first swing arm is fixedly connected to the first shell; A second swing arm is disposed on the other side of the base, one end of the second swing arm is rotatably connected to the base, and the other end of the second swing arm is fixedly connected to the second shell; Among them, the first swing arm and the second swing arm can rotate between a folded state and an unfolded state. When the first swing arm and the second swing arm are in the folded state, the folding screen assembly is bent, and the folding screen assembly is located between the first shell and the second shell.

15. The foldable screen terminal according to any one of claims 10 to 14, characterized in that: The protective coating covers the area of ​​the folding screen assembly opposite to the hinge mechanism.

16. The foldable screen terminal according to any one of claims 10 to 14, characterized in that: The roughness of the surface of the protective coating away from the folding screen assembly is: 0.4<Ra<5.

17. The foldable screen terminal according to any one of claims 10 to 14, characterized in that: The roughness of the surface of the protective coating away from the folding screen assembly is: 0.5<Ra<1.

5.

18. The foldable screen terminal according to any one of claims 10 to 14, characterized in that: The dynamic friction coefficient of the surface of the protective coating away from the folding screen assembly is 0-1.

19. The foldable screen terminal according to any one of claims 10 to 14, characterized in that: The protective coating is an ink layer, and the material of the ink layer includes acrylic acid, epoxy resin or polyurethane.

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