Display module and electronic equipment

Abstract

The utility model provides a display module and electronic equipment, relates to the technical field of display, and is used for solving the problem of how to improve the reliability of the display module. Specifically, the display module comprises a display panel, a light-transmitting cover plate, an optical adhesive layer and a protective layer. The display panel comprises a first main body part and a first bending part, and the first bending part is connected with the outer edge of the first main body part. The light-transmitting cover plate is located on the display side of the display panel. The light-transmitting cover plate comprises a second main body part and a second bending part, the second bending part is connected with the outer edge of the second main body part, the second main body part and the first main body part are arranged in a stacked mode, and the second bending part and the first bending part are arranged in a stacked mode. The optical adhesive layer is arranged between the light-transmitting cover plate and the display panel. The protective layer comprises a first part, and the first part is arranged between the first bending part and the second bending part in a stacked mode. Wherein the first part is clamped in the optical adhesive layer, and the strength of the first part is greater than that of the optical adhesive layer; or the first part is a coating covering the second bending part.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and an electronic device. Background Art

[0002] In recent years, with the increasing maturity of flexible screen technology, curved screen electronic devices have become increasingly popular among users due to their ability to provide a wider field of view, better appearance, and more comfortable grip. Curved screens typically consist of a stacked, transparent cover plate and display panel. Because the curved edge of a curved screen is often exposed outside the midframe, the midframe provides less protection from the transparent cover plate when the electronic device is impacted. The curved portion of the transparent cover plate is susceptible to cracking, and cracks that extend toward the display panel can damage and fail, resulting in lower reliability for the display module. Utility Model Content

[0003] Embodiments of the present application provide a display module and an electronic device for solving the problem of how to improve the reliability of the display module.

[0004] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a display module, which includes a display panel, a light-transmitting cover plate, an optical adhesive layer and a protective layer. The display panel includes a first main body and a first bending portion, and the first bending portion is connected to the outer edge of the first main body. The light-transmitting cover plate is located on the display side of the display panel; the light-transmitting cover plate includes a second main body and a second bending portion, the second bending portion is connected to the outer edge of the second main body, the second main body is stacked with the first main body, and the second bending portion is stacked with the first bending portion. The optical adhesive layer is arranged between the light-transmitting cover plate and the display panel. The protective layer includes a first part, and the first part is stacked between the first bending portion and the second bending portion. Wherein, the first part is sandwiched in the optical adhesive layer, and the strength of the first part is greater than the strength of the optical adhesive layer; or, the first part is a coating covering the second bending portion.

[0006] The display module provided in the embodiments of the present application comprises a first portion of a protective layer laminated between the second bent portion of the light-transmitting cover plate and the first bent portion of the display panel. The first portion is sandwiched within the optical adhesive layer and has a strength greater than that of the optical adhesive layer. When the second bent portion of the light-transmitting cover plate cracks, the crack propagates to the protective layer under stress. The protective layer can absorb and transfer a significant amount of the stress and prevent the crack from further propagating, thereby preventing the display panel from deforming or cracking due to excessive stress, thereby effectively improving the display panel's survival rate, reducing the display module's display function failure rate, and ensuring the display module's reliability. Alternatively, by forming the first portion of the protective layer as a coating covering the second bent portion of the light-transmitting cover plate, the integral structure formed by the protective layer and the light-transmitting cover plate has a strength greater than that of the light-transmitting cover plate. When the second bent portion of the light-transmitting cover plate cracks, the protective layer can also absorb and transfer the stress, thereby preventing excessive stress from being transferred to the optical adhesive layer and the display panel, causing the display panel to be subjected to excessive stress and fail, thereby ensuring the reliability of the display module and increasing its service life.

[0007] In some possible implementations of the first aspect, the protective layer further includes a second portion, the second portion being connected to the first portion and laminated between the first and second main portions. The second portion is sandwiched within the optical adhesive layer, and its strength is greater than that of the optical adhesive layer. Alternatively, the second portion is a coating covering the second main portion.

[0008] In this way, when the second main body of the transparent cover plate is impacted and cracked, the protective layer can absorb the transferred stress, preventing excessive stress from being transferred to the display panel and causing display panel failure. In addition, the overall shape of the protective layer is compatible with the overall shape of the display panel, making it easy to form the protective layer on the surface of the transparent cover plate or to assemble the protective layer between the transparent cover plate and the display panel, thereby reducing the design and assembly difficulty of the display module.

[0009] In some possible implementations of the first aspect, the first part is a coating covering the second bending portion, and the orthographic projection of the protective layer on the first plane does not overlap with the orthographic projection of the first main body on the first plane; wherein the first plane is perpendicular to the stacking direction of the first main body and the second main body.

[0010] In this way, the protective layer can improve the reliability of the display module without affecting the light transmittance of the display side of the first main body of the display panel, thereby ensuring the display performance of the display module.

[0011] In some possible implementations of the first aspect, the first portion is in a grid shape. This improves the reliability of the display module while ensuring that the light transmittance of the display panel's display side structure is as high as possible, thereby ensuring the display brightness and contrast of the display module and the display performance of the electronic device.

[0012] In some possible implementations of the first aspect, the first portion is an organic coating. Thus, the first portion can have good strength and rigidity, as well as good insulation and other properties, thereby improving the reliability of the display module while also ensuring the display module has good insulation and other properties.

[0013] In some possible implementations of the first aspect, the first part is a coating covering the second bending portion, and the first part includes at least one of a polyphenylene ether layer, a polyimide, a polymethyl methacrylate layer, a polycarbonate layer, and a polyethylene terephthalate layer.

[0014] In some possible implementations of the first aspect, the elastic modulus of the first portion is greater than the elastic modulus of the optical adhesive layer. This increases the rigidity of the protective layer and reduces its deformation. When the light-transmitting cover plate cracks, the protective layer can absorb and transfer a greater amount of stress, preventing the excessive stress from being transferred to the display panel and causing deformation or cracking, leading to failure of the display panel.

[0015] In some possible implementations of the first aspect, the elastic modulus of the first portion of the protective layer is greater than or equal to 1 GPa.

[0016] In some possible implementations of the first aspect, the display module further includes a polarizer, which is laminated between the transparent cover plate and the display panel. As a result, when ambient light passes through the polarizer, the portion of the ambient light whose vibration direction is perpendicular to the polarizer's transmission axis is absorbed, which helps reduce reflection of ambient light by the display panel's cathode material, thereby reducing interference with the display brightness and contrast of the display module caused by ambient light.

[0017] In some possible implementations of the first aspect, the polarizer is located between the optical adhesive layer and the display panel. This allows the polarizer to be first attached to the display panel to form a display function assembly, which is then bonded to the transparent cover plate via the optical adhesive layer. This facilitates the rational arrangement of the display module manufacturing process steps and improves display module manufacturing efficiency.

[0018] In some possible implementations of the first aspect, a protective layer is sandwiched within the optical adhesive layer and includes a quarter-wave plate. The fast or slow axis of the quarter-wave plate forms an angle of 45° with the transmission axis of the polarizer. This allows light emitted from the display panel to be converted into linearly polarized light after passing through the polarizer, and then into circularly polarized light after passing through the protective layer, thereby alleviating visual fatigue and protecting the user's eyes.

[0019] In some possible implementations of the first aspect, the light transmittance of the protective layer is greater than or equal to 90%. This improves the reliability of the display module while also ensuring the display brightness and contrast of the display module.

[0020] In some possible implementations of the first aspect, the protective layer is sandwiched within the optical adhesive layer, and the protective layer includes at least one of a polymethyl methacrylate layer, an ultra-thin glass UTG layer, and a polycarbonate layer.

[0021] In some possible implementations of the first aspect, the thickness of the protective layer is greater than or equal to 10 microns and less than or equal to 100 microns. This ensures that the protective layer has maximum possible strength and rigidity to ensure the reliability of the display module and prevents the thickness of the display module from being too large due to the excessive thickness of the protective layer.

[0022] In some possible implementations of the first aspect, the display module further includes an ink layer, the ink layer being disposed on a surface of the second bent portion facing the display panel, with at least a portion of the ink layer being located on a side of the first portion away from the second main portion, and a portion of the optical adhesive layer being sandwiched between the ink layer and the first bent portion. In this manner, the ink layer can shield components within the display module, and the portion of the optical adhesive layer sandwiched between the ink layer and the first bent portion can maximize the area of ​​the optical adhesive layer, preventing an edge portion of the optical adhesive layer from being located between the display area of ​​the display panel and the light-transmitting cover plate, thereby preventing bubbles from forming on the edge portion of the optical adhesive layer and affecting the display quality of the display module.

[0023] In some possible implementations of the first aspect, the display module further includes a buffer layer, which is laminated on a side of the display panel facing away from the light-transmitting cover plate. Thus, when the display module is impacted, the buffer layer can absorb the impact force, protecting the display module and further improving the reliability of the display module.

[0024] In a second aspect, an embodiment of the present application provides an electronic device, comprising a housing and a display module. The display module is the display module described in any of the above implementations, and the display module is fixed to the housing.

[0025] Since the electronic device provided in the embodiment of the present application includes the display module described in the above embodiment, the two can solve the same problem and achieve the same effect, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of an electronic device provided for some embodiments of the present application;

[0027] Figure 2 for Figure 1 A cross-sectional structural diagram of the electronic device shown at line AA;

[0028] Figure 3 for Figure 1 Another cross-sectional structural diagram of the display module of the electronic device shown;

[0029] Figure 4 for Figure 3 The schematic diagram of crack propagation of the display module is shown;

[0030] Figure 5 for Figure 1 Another cross-sectional structural diagram of the display module of the electronic device shown;

[0031] Figure 6 for Figure 1 Another cross-sectional structural diagram of the display module of the electronic device shown;

[0032] Figure 7 for Figure 1 Another cross-sectional structural diagram of the display module of the electronic device shown;

[0033] Figure 8 for Figure 1 Another cross-sectional structural diagram of the display module of the electronic device shown;

[0034] Figure 9 for Figure 1 Another cross-sectional structural diagram of the display module of the electronic device shown;

[0035] Figure 10 for Figure 1 Another cross-sectional structural diagram of the display module of the electronic device shown;

[0036] Figure 11 for Figure 1 Another cross-sectional structural diagram of the display module of the electronic device shown;

[0037] Figure 12 for Figure 1 Another cross-sectional structural diagram of a display module of an electronic device is shown.

[0038] Reference numerals:

[0039] 100-Electronic equipment;

[0040] 10-display module; 11-transparent cover plate; 111-second main body; 112-second bending portion; 12-display panel; 121-first main body; 122-first bending portion; 13-optical adhesive layer; 131-first adhesive layer; 132-second adhesive layer; 14-polarizer; 15-buffer layer; 16-protective layer; 161-first portion; 162-second portion; 17-ink layer;

[0041] 20 - housing; 21 - back cover; 22 - middle frame; 221 - frame; 221a - sink; 222 - middle plate;

[0042] 30-circuit board;

[0043] 40-battery. DETAILED DESCRIPTION

[0044] In the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0045] In the embodiments of the present application, it should be understood that the directional terms mentioned, such as "up", "down", "left", "right", "inside", "outside", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0046] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0047] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0048] In the embodiments of this application, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0049] In the embodiments of the present application, it should be noted that the descriptions "vertical" and "parallel" respectively represent approximately vertical and approximately parallel within a certain error range, and the error range can be a range where the deviation angle is less than or equal to 5°, 8° or 10° relative to absolute vertical and absolute parallel, respectively, and no specific limitation is made here.

[0050] The present application provides an electronic device, which may be a mobile phone, tablet computer, monitor, television, digital photo frame, personal digital assistant (PDA), laptop computer, car computer, navigation system, car audio, wearable device, or any other product or component with a display function. Wearable devices include, but are not limited to, smart bracelets, smart watches, smart head-mounted displays, and smart glasses.

[0051] See also Figure 1 , Figure 1 A three-dimensional diagram of an electronic device 100 provided for some embodiments of the present application. This embodiment and the embodiments below are exemplified by taking the electronic device 100 as a mobile phone. The electronic device 100 is approximately in the shape of a rectangular plate. On this basis, in order to facilitate the description of the embodiments below, an XYZ coordinate system is established, and the width direction of the electronic device 100 is defined as the X-axis direction, the length direction of the electronic device 100 is defined as the Y-axis direction, and the thickness direction of the electronic device 100 is defined as the Z-axis direction. It can be understood that the coordinate system setting of the electronic device 100 can be flexibly set according to actual needs, and no specific limitation is made here. In some other embodiments, the shape of the electronic device 100 can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc., which are not specifically limited here.

[0052] Please also refer to Figure 1 and Figure 2 , Figure 2 for Figure 1 The electronic device 100 is a cross-sectional structural diagram at line AA. The electronic device includes a display module 10, a housing 20, a circuit board 30 and a battery 40. It is understood that Figure 1 and Figure 2 Only some components of the electronic device 100 are schematically shown, and the actual shapes, sizes, positions and structures of these components are not affected by the present invention. Figure 1 and Figure 2 restrictions.

[0053] The housing 20 is used to protect the internal electronic components of the electronic device 100. The housing 20 may include a back cover 21 and a middle frame 22. The back cover 21 may be roughly in the shape of a plate consistent with the appearance of the electronic device 100. The middle frame 22 serves as the supporting skeleton of the electronic device 100. The middle frame 22 includes a frame 221 and a middle plate 222. The frame 221 may be fixedly connected to the back cover 21. In some examples, the frame 221 may be fixedly connected to the back cover 21 by means of gluing, snapping, etc. In other examples, the frame 221 may also be an integrally molded structure with the back cover 21, that is, the frame 221 and the back cover 21 are a single structural component. The middle plate 222 is located on the inner side of the frame 221, and is stacked and spaced apart with the back cover 21. The outer edge of the middle plate 222 is connected to the inner side of the frame 221. In some examples, the outer edge of the middle plate 222 is fixed to the inner side of the frame 221 by gluing. In other examples, the middle plate 222 may be integrally formed with the frame 221, i.e., the middle plate 222 and the frame 221 are a single structural unit. The middle plate 222, the frame 221, and the back cover 21 define a receiving space. In other embodiments, the middle frame 22 may not include the middle plate 222.

[0054] Please continue reading Figure 1 and Figure 2 The circuit board 30 may be a main circuit board of the electronic device 100 , fixed inside the electronic device 100 , and stacked with the back cover 21 and spaced apart. Figure 1 In the embodiment shown, the circuit board 30 is located between the middle plate 222 and the back cover 21 and is fixed to the middle plate 222. In other embodiments, when the middle frame 22 does not include the middle plate 222, the circuit board 30 may also be fixed to other components (such as the display module 10).

[0055] The circuit board 30 can be a rigid circuit board, a flexible circuit board, or a rigid-flexible circuit board. The circuit board 30 can be a FR-4 dielectric board, a Rogers dielectric board, a mixed dielectric board of FR-4 and Rogers, and so on. Here, FR-4 is a code name for a grade of flame-retardant material, and the Rogers dielectric board is a high-frequency board. The circuit board 30 is used to set electronic components and realize electrical connections between electronic components. Among them, the electronic components can be, for example, a central processing unit (CPU), a graphics processing unit (GPU), a universal flash storage (UFS), an earpiece, a camera module, and a flash module.

[0056] The battery 40 is fixed inside the electronic device 100, between the middle plate 222 and the back cover 21. The battery 40 is used to provide power to the circuit board 30, the display module 10, etc. The battery 40 can be fixed on the middle plate 222. In some examples, the surface of the middle plate 222 facing the back cover 21 can be provided with a battery slot, and the battery 40 is installed in the battery slot. In some other embodiments, when the middle frame 22 does not include the middle plate 222, the battery 40 can also be fixed to other components (such as the display module 10). The battery 40 can include but is not limited to nickel-cadmium batteries 40, nickel-metal hydride batteries 40, lithium batteries 40 or other types of batteries 40. The number of batteries 40 can be multiple or one, and this application does not limit this.

[0057] The display module 10 is used to display videos, images, etc. Figure 2 The display module 10 is located on the side of the middle plate 222 facing away from the back cover 21 and is stacked with the middle plate 222 and the back cover 21. The display module 10 can be a curved display module, which can improve the appearance of the electronic device 100 and make it more comfortable to hold. It can also increase the visible area of ​​the display module 10 and provide a better visual effect. The display module 10 can include a transparent cover plate 11 and a display panel 12.

[0058] The light-transmitting cover plate 11 is located on the display side of the display panel 12 and is stacked with the display panel 12. The light-transmitting cover plate 11 is mainly used to protect the display panel 12 and prevent dust. The material of the light-transmitting cover plate 11 includes but is not limited to glass. The light-transmitting cover plate 11 includes a second main body portion 111 and a second bending portion 112. The second main body portion 111 can be in the shape of a rectangular flat plate, the length extension direction of the second main body portion 111 is parallel to the Y-axis direction, and the width extension direction of the second main body portion 111 is parallel to the X-axis direction. The second bending portion 112 is located on the outer peripheral side of the second main body portion 111 and is connected to the outer edge of the second main body portion 111. The second bending portion 112 bends toward the side of the light-transmitting cover plate 11 facing the display panel 12. In some other embodiments, the second main body portion 111 can also be in the shape of an arc-shaped plate, and the second main body portion 111 is arched toward the side away from the display panel.

[0059] In some examples, the second bending portion 112 includes a flat portion and an arc portion, and the arc portion is connected between the flat portion and the second main body 111. In other examples, the second bending portion 112 is in the shape of an arc plate. The specific shape of the second bending portion 112 is not limited in this application. Figure 2 In the illustrated embodiment, there are two second bending portions 112, one located on either side of the second main portion 111 along the X-axis. In other embodiments, there may be only one second bending portion 112, which is annular and surrounds the second main portion 111.

[0060] The transparent cover plate 11 can be fixed to the frame 221 of the housing 20, that is, the display module 10 is fixed to the housing 20. Specifically, the end surface of the frame 221 facing away from the back cover 21 has a recessed groove 221a. The edge of the transparent cover plate 11 is located within the recessed groove 221a and is fixedly connected to the frame 221. In some examples, the transparent cover plate 11 can be fixed to the frame 221 by gluing. Specifically, at least the outer side surface of the transparent cover plate 11 and the groove wall of the recessed groove 221a are bonded by an adhesive layer.

[0061] The display panel 12 is a component for displaying videos and images. The display panel 12 can be a flexible display panel. For example, the display panel 12 can be an organic light-emitting diode (OLED) display panel, an active-matrix organic light-emitting diode (AMOLED) display panel, a mini organic light-emitting diode (OLED) display panel, a micro organic light-emitting diode (OLED) display panel, a micro organic light-emitting diode (OLED) display panel, a quantum dot light-emitting diode (QLED) display panel, etc.

[0062] Please continue reading Figure 2 The shape of the display panel 12 is adapted to the shape of the transparent cover plate 11, and the display panel 12 is located in the accommodation space enclosed by the transparent cover plate 11 and the middle plate 222. The display panel 12 includes a first main body portion 121 and a first bending portion 122. The first main body portion 121 and the second main body portion 111 are stacked along the thickness direction (Z-axis direction) of the display module 10. The first bending portion 122 is located on the outer peripheral side of the first main body portion 121 and is connected to the outer edge of the first main body portion 121. The first bending portion 122 is bent toward the non-display side of the display panel 12, and a first bending portion 122 and a second bending portion 112 are stacked. The outer side surface of the transparent cover plate 11 protrudes from the outer side surface of the display panel 12, so that the transparent cover plate 11 can be connected to the frame 221 and protect the display panel 12.

[0063] See also Figure 3 , Figure 3 for Figure 1 Another cross-sectional structural diagram of the display module 10 of the electronic device 100 is shown. Figure 3 The embodiment shown is Figure 2 The difference of the illustrated embodiment is that the display module 10 further includes an optical adhesive layer 13 , a polarizer 14 and a buffer layer 15 .

[0064] The polarizer (POL) 14, also known as a polarizer, is used to control the polarization direction of the light beam. That is, when the light beam passes through the polarizer 14, the light whose vibration direction is perpendicular to the transmission axis of the polarizer 14 will be absorbed, and only the polarized light whose polarization direction is parallel to the transmission axis of the polarizer 14 will be transmitted. Based on this, the polarizer 14 is stacked between the transparent cover 11 and the display panel 12. In this way, when ambient light from outside the electronic device 100 passes through the polarizer 14, the portion of the ambient light whose vibration direction is perpendicular to the transmission axis of the polarizer 14 is absorbed, which helps to reduce the reflection of ambient light by the cathode material of the display panel 12, and further helps to reduce the interference of ambient light on the display brightness and contrast of the display module 10.

[0065] Based on the above, the optical adhesive layer 13 is stacked between the transparent cover plate 11 and the display panel 12 . Figure 3 In the illustrated embodiment, the polarizer 14 is positioned between the optical adhesive layer 13 and the display panel 12, i.e., the polarizer 14 and the display panel 12 are bonded to the transparent cover plate 11 via the optical adhesive layer 13. This allows the polarizer 14 to be first attached to the display panel 12 to form a display assembly, which is then bonded to the transparent cover plate 11 via the optical adhesive layer 13. This facilitates the rational arrangement of the manufacturing process steps for the display module 10 and improves the manufacturing efficiency of the display module 10. In other embodiments, the display module 10 may also not include the polarizer 14, and the optical adhesive layer 13 may be bonded between the transparent cover plate 11 and the display panel 12, i.e., one surface of the optical adhesive layer 13 is bonded to the transparent cover plate 11, and the other surface is bonded to the display panel 12.

[0066] The optical adhesive layer 13 has a light transmittance greater than or equal to 95%. For example, the light transmittance of the optical adhesive layer 13 can be 95%, 96%, 97%, 98%, 99%, 99.5%, 99.8%, etc. In this way, while achieving bonding of the components of the display module 10, light energy loss is minimized to ensure the display brightness and contrast of the display module 10.

[0067] Please continue reading Figure 3, the buffer layer 15 is stacked on the side of the display panel 12 facing away from the transparent cover plate 11. The buffer layer 15 may include a foam layer and a metal foil layer (such as a copper foil layer) stacked, and the buffer layer 15 is fixed to the surface of the display panel 12 facing away from the transparent cover plate 11. In this way, when the electronic device 100 is impacted, the buffer layer 15 can absorb the impact force and protect the display module 10. In addition, the buffer layer 15 can also play a role in heat dissipation. Finally, the buffer layer 15 can also play a role in grounding to release electrostatic charges and prevent electrostatic charges from interfering with the electric field of the display panel 12.

[0068] See also Figure 2-Figure 4 , Figure 4 for Figure 3 The diagram shows a crack propagation diagram of the display module 10. Since the display module 10 is a curved display module, the second bent portion 112 of the light-transmitting cover plate 11 is exposed outside the frame 221, making the frame 221 less protective of the display module 10. During conventional mechanical reliability tests on the electronic device 100, such as drop height tests and roller cycle tests, the light-transmitting cover plate 11 of the display module 10, especially the second bent portion 112 of the light-transmitting cover plate 11, may crack under conditions of lower drop heights and fewer roller cycle tests. Consequently, when a user uses the electronic device 100 and the electronic device 100 is impacted, the second bent portion 112 of the light-transmitting cover plate 11 is also more likely to crack. Based on this, after the transparent cover plate 11 cracks, due to the weak strength of the optical adhesive layer 13, the stress of the transparent cover plate 11 will more easily cause the optical adhesive layer 13 to continue to be transmitted to the polarizer 14 and the display panel 12 after the crack, causing the display panel 12 to be damaged and fail within a short period of time after the transparent cover plate 11 cracks. Therefore, the reliability of the display module 10 is low.

[0069] To solve the above problem, please refer to Figure 5 , Figure 5 for Figure 1 Another cross-sectional structural diagram of the display module 10 of the electronic device 100 is shown. Figure 5 The embodiment shown is Figure 3 and Figure 4The difference of the illustrated embodiment is that the display module 10 further includes a protective layer 16. The protective layer 16 includes a first portion 161 and a second portion 162. The shape of the first portion 161 matches the shape of the first bending portion 122 and the second bending portion 112, and the first portion 161 is stacked between the first bending portion 122 and the second bending portion 112. The shape of the second portion 162 matches the shape of the first main portion 121 and the second main portion 111, and the second portion 162 is connected to the first portion 161 and stacked between the first main portion 121 and the second main portion 111. The first portion 161 is sandwiched within the optical adhesive layer 13, and the strength of the first portion 161 is greater than the strength of the optical adhesive layer 13. The second portion 162 is sandwiched within the optical adhesive layer 13, and the strength of the second portion 162 is greater than the strength of the optical adhesive layer 13. Specifically, at least the tensile strength of the first portion 161 and at least the tensile strength of the second portion 162 are greater than the tensile strength of the optical adhesive layer 13.

[0070] In this way, since the strength of the protective layer 16 is greater than the strength of the optical adhesive layer 13, when the transparent cover plate 11 cracks, under the action of stress, when the crack expands to the protective layer 16, the protective layer 16 will take over and transfer more stress and prevent the crack from continuing to expand, thereby preventing the display panel 12 from being deformed or cracked and failing due to excessive stress, thereby effectively improving the survival rate of the display panel 12, reducing the display function failure rate of the display module 10, and ensuring the reliability of the display module 10.

[0071] Figure 5 In the illustrated embodiment, the optical adhesive layer 13 includes a first adhesive layer 131 and a second adhesive layer 132. The first adhesive layer 131 is bonded between the transparent cover plate 11 and the protective layer 16, and the second adhesive layer 132 is bonded between the protective layer 16 and the polarizer 14. Thus, when manufacturing the display module 10, a blank of the first adhesive layer 131, the protective layer 16, and the second adhesive layer 132 can be fabricated into a composite laminated structure blank. This composite laminated structure blank is die-cut to form a composite laminated structure compatible with the transparent cover plate 11 and the display panel 12. The protective film on the surface of the composite laminated structure is then removed, and the composite laminated structure is first bonded to the display panel 12 and then to the transparent cover plate 11. Finally, the optical adhesive layer 13 is degassed and cured / activated to obtain the display module 10. This facilitates the rational arrangement of the manufacturing process steps for the display module 10, improves the manufacturing efficiency of the display module 10, and reduces the manufacturing difficulty of the display module 10.

[0072] The first adhesive layer 131 and the second adhesive layer 132 can both be optically clear adhesive (OCA) layers. This makes the optical adhesive layer 13 colorless and transparent, with high light transmittance and good bonding strength. It can be cured at room or medium temperatures, exhibits minimal shrinkage upon curing, and has minimal impact on the display quality of the display module 10.

[0073] Based on this, the thickness of the optical adhesive layer 13 can be greater than or equal to 20 microns and less than or equal to 300 microns. Specifically, the thickness of the first adhesive layer 131 can be greater than or equal to 10 microns and less than or equal to 150 microns; the thickness of the second adhesive layer 132 can be greater than or equal to 10 microns and less than or equal to 150 microns. For example, the thickness of the first adhesive layer 131 can be 10 microns, 15 microns, 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 100 microns, 120 microns, 150 microns, etc.; the thickness of the second adhesive layer 132 can be 10 microns, 15 microns, 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 100 microns, 120 microns, 150 microns, etc. In this way, the optical adhesive layer 13 can be prevented from being too thin, which would weaken the bonding strength between the optical adhesive layer 13 and the transparent cover plate 11, the polarizer 14, and the protective layer 16; the optical adhesive layer 13 can also be prevented from being too thick, which would make the overall thickness of the display module 10 thicker, which would be detrimental to the thinning of the electronic device 100.

[0074] On the basis of the above, the elastic modulus of the first portion 161 of the protective layer 16 is greater than the elastic modulus of the optical adhesive layer 13. The elastic modulus of the second portion 162 of the protective layer 16 is greater than the elastic modulus of the optical adhesive layer 13. In some examples, the elastic modulus of the protective layer 16 may be greater than or equal to 1 GPa. For example, the elastic modulus of the protective layer 16 may be 1 GPa, 3 GPa, 4 GPa, 5 GPa, 10 GPa, 20 GPa, 30 GPa, 40 GPa, 50 GPa, 60 GPa, 70 GPa, 80 GPa, and the like. In this way, the rigidity of the protective layer 16 can be greater to prevent the stress from being transferred to the protective layer 16 when the transparent cover plate 11 cracks. The insufficient rigidity of the protective layer 16 makes it easier to deform and unable to bear more stress, resulting in more stress being transferred to the display panel 12, causing the display panel 12 to deform or crack and fail.

[0075] Based on the above, the light transmittance of the protective layer 16 is greater than or equal to 90%. For example, the light transmittance of the protective layer 16 can be 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, etc. This improves the reliability of the display module 10 while also ensuring the display brightness and contrast of the display module 10, thereby ensuring the overall reliability and display performance of the electronic device 100.

[0076] Based on the above, the thickness of the protective layer 16 can be greater than or equal to 10 microns and less than or equal to 100 microns. For example, the thickness of the protective layer 16 can be 10 microns, 15 microns, 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, etc. This ensures that the protective layer 16 has the greatest possible strength and rigidity to ensure the reliability of the display module 10, and also prevents the protective layer 16 from being too thick, which would otherwise increase the thickness of the display module 10.

[0077] The protective layer 16 can be made of various materials.

[0078] In some embodiments, the protective layer 16 may be a polymethyl methacrylate (PMMA) layer. This allows the protective layer 16 to have improved hardness, tensile strength, flexural strength, and UV resistance, thereby improving the overall reliability and UV resistance of the display module 10.

[0079] In other embodiments, the protective layer can be a polycarbonate (PC) layer. This provides the protective layer with high strength and rigidity, excellent heat resistance, and good toughness, impact resistance, and corrosion resistance, thereby improving the overall reliability, corrosion resistance, and heat resistance of the display module.

[0080] In some other embodiments, the protective layer 16 may be an ultra-thin glass (UTG) layer. This provides the protective layer 16 with superior strength and rigidity, high light transmittance, and excellent heat resistance and chemical stability. This improves the overall reliability of the display module 10 while also enhancing its overall heat resistance and corrosion resistance.

[0081] In some other embodiments, the protective layer 16 can be a 1 / 4 wave plate. The 1 / 4 wave plate has two special directions, a fast axis and a slow axis, and the refractive indices of the fast axis and the slow axis are different, resulting in a certain phase difference between the light waves propagating along these two directions. When linearly polarized light is incident on the 1 / 4 wave plate at a certain angle, if this angle is neither parallel to the fast axis nor to the slow axis, a phase difference will be generated between the components of the light wave on the fast axis and the slow axis, so that the output light becomes elliptically polarized light. In particular, when the polarization direction of the linearly polarized light is at a 45-degree angle to the fast axis or slow axis of the 1 / 4 wave plate, the amplitudes of the components of the light on the fast axis and the slow axis are equal, and the phase difference is 90 degrees, and the output light will become circularly polarized light. Based on this, the angle between the fast axis or slow axis of the protective layer 16 and the transmission axis of the aforementioned polarizer 14 is 45°. In this way, the light emitted from the display panel 12 is converted into linearly polarized light after passing through the polarizer 14 , and then converted into circularly polarized light after passing through the protective layer 16 , which helps to relieve the user's visual fatigue and thus protect the user's eyes.

[0082] In some other embodiments, the protective layer 16 may also be a composite layer structure, and the protective layer 16 includes two or more of the aforementioned PMMA layer, PC layer, UTG layer, and 1 / 4 wave plate layer. Figure 6 , Figure 6 for Figure 1 Another cross-sectional view of the display module 10 of the electronic device 100 is shown. The protective layer 16 may also not include the second portion 162, and the protective layer 16 may be sandwiched within the edge of the optical adhesive layer 13. In this case, the thickness of the optical adhesive layer 13 bonded to the second main portion 111 of the transparent cover plate 11 is greater than the thickness of the optical adhesive layer 13 bonded to the second bent portion 112 of the transparent cover plate 11.

[0083] In some other embodiments, see Figure 7 , Figure 7 for Figure 1 Another cross-sectional structural diagram of the display module 10 of the electronic device 100 is shown. The protective layer 16 can also be located between the polarizer 14 and the display panel 12. The first adhesive layer 131 of the optical adhesive layer 13 is bonded between the transparent cover plate 11 and the polarizer 14. The polarizer 14 is attached to the protective layer 16. The second adhesive layer 132 of the optical adhesive layer 13 is bonded between the protective layer 16 and the display panel 12. That is, the polarizer 14 is also sandwiched within the optical adhesive layer 13. Based on this, the first adhesive layer 131 of the optical adhesive layer 13 can be an OCA layer, and the second adhesive layer 132 can be a pressure-sensitive adhesive (PSA) layer. The second adhesive layer 132 does not need to be cured and can achieve bonding performance by being activated under the action of pressure.

[0084] Based on the above, please refer to Figure 8 , Figure 8 for Figure 1 Another cross-sectional structural diagram of the display module 10 of the electronic device 100 is shown. Figure 8 The embodiment shown is Figure 5 The difference of the illustrated embodiment is that the display module further includes an ink layer 17, which is disposed on the surface of the second bend portion 112 of the transparent cover plate 11 facing the display panel 12, and a portion of the ink layer 17 is located on the side of the first portion 161 of the protective layer 16 away from the second main body portion 111. Specifically, the ink layer 17 can be covered on the surface of the second bend portion 112 by a silk-screen printing or transfer process so that the adhesion between the ink layer 17 and the second bend portion 112 is as large as possible. In this way, the ink layer 17 can shield the internal structure of the electronic device 100 and ensure the aesthetic appearance of the electronic device 100. Based on this, the edge portion of the optical adhesive layer 13 is bonded to another portion of the ink layer 17, that is, a portion of the optical adhesive layer 13 is sandwiched between the ink layer 17 and the first bend portion 122 of the display panel 12. In this way, the area of ​​the optical adhesive layer 13 can be made as large as possible, preventing the edge of the optical adhesive layer 13 from being located between the display area of ​​the display panel 12 and the transparent cover plate 11 , thereby preventing the edge of the optical adhesive layer 13 from bubbling and affecting the display effect of the display module 10 .

[0085] See also Figure 9 , Figure 9 for Figure 1 Another cross-sectional structural diagram of the display module 10 of the electronic device 100 is shown. Figure 9 The embodiment shown is Figure 5 The difference of the illustrated embodiment is that the first portion 161 of the protective layer 16 is a coating covering the second bent portion 112 of the light-transmitting cover plate 11. The second portion 162 of the protective layer 16 is a coating covering the second main portion 111 of the light-transmitting cover plate 11. Specifically, the protective layer 16 can be an organic coating, which can be formed on the surface of the light-transmitting cover plate 11 by a coating process such as brushing, dipping, spraying, electrophoretic coating, or electrostatic spraying. In this way, the protective layer 16 has higher mechanical properties, which can make the integral structure formed by the protective layer 16 and the light-transmitting cover plate 11 have higher strength and toughness than the light-transmitting cover plate 11. When the light-transmitting cover plate 11 is cracked by impact, the protective layer 16 can play a role in differentiating stress, thereby preventing excessive stress from being transferred to the optical adhesive layer 13 and the display panel 12, causing the display panel 12 to be subjected to excessive stress and fail, thereby ensuring the reliability of the display module 10.

[0086] Figure 9 The strength of the protective layer 16 in the display module 10 shown can be greater than the strength of the optical adhesive layer 13. The protective layer 16 can be made of various materials.

[0087] In some embodiments, the protective layer 16 may be a polyphenylene ether layer. Thus, the protective layer 16 has high rigidity and strength, as well as good heat resistance, electrical properties, and dimensional stability, thereby improving the reliability of the display module 10 while also enhancing the insulation and creep resistance of the display module 10.

[0088] In other embodiments, the protective layer 16 may be a polyimide (PI) layer. This allows the protective layer 16 to have good strength, chemical stability, moisture and heat resistance, radiation resistance, and dielectric properties. This improves the reliability of the display module 10 while also enhancing its insulation, corrosion resistance, and radiation resistance.

[0089] In some other embodiments, the protective layer 16 may be a polyethylene terephthalate (PET) layer. This allows the protective layer 16 to have good strength, heat resistance, insulation, and transparency, thereby improving the reliability of the display module 10 while also enhancing its insulation and heat resistance.

[0090] In some other embodiments, the protective layer 16 may be a polymethyl methacrylate layer. In this case, the effect of the protective layer 16 may refer to the above description and will not be described in detail here.

[0091] In some other embodiments, the protective layer 16 may be a polycarbonate layer. In this case, the effect of the protective layer 16 may refer to the above description and will not be described in detail here.

[0092] In some other embodiments, the protective layer 16 may also be a composite layer structure formed by two or more of a polyphenylene ether layer, a polyimide layer, a polymethyl methacrylate layer, and a polycarbonate layer.

[0093] On the basis of the above, the first part 161 of the protective layer 16 can be in a grid shape. The second part 162 of the protective layer 16 can be in a grid shape. Specifically, the grids of the first part 161 and the second part 162 of the protective layer 16 can be regular shapes. For example, the grids of the first part 161 and the second part 162 can be squares, rectangles, diamonds, triangles, etc.; the grids of the first part 161 and the second part 162 can also be other irregular shapes, which is not limited in this application. In this way, while improving the reliability of the display module 10, the transmittance of the structure on the display side of the display panel 12 can be as high as possible, ensuring the display brightness and contrast of the display module 10, and ensuring the display performance of the electronic device 100.

[0094] In some other embodiments, see Figure 10 , Figure 10for Figure 1 Another cross-sectional structural diagram of the display module 10 of the electronic device 100 is shown. Figure 10 The embodiment shown is Figure 9 The difference of the embodiment shown is that the protective layer 16 does not include the second part 162, that is, the orthographic projection of the protective layer 16 on the first plane does not overlap with the orthographic projection of the first main body 121 of the display panel 12 on the first plane. The first plane is perpendicular to the stacking direction of the first main body 121 and the second main body 111, that is, the first plane is a plane perpendicular to the Z-axis direction. In this way, the protective layer 16 can improve the reliability of the display module 10 while not affecting the transmittance of the display side of the first main body 121 of the display panel 12, thereby ensuring the display performance of the display module 10. In this case, a portion of the optical adhesive layer 13 is filled in the space enclosed by the protective layer 16 and the second main body 111 of the transparent cover plate 11, that is, the thickness of the portion of the optical adhesive layer 13 bonded to the second main body 111 of the transparent cover plate 11 is greater than the thickness bonded to the first part 161.

[0095] Based on this, the thickness of the first portion 161 of the protective layer 16 is greater than or equal to 10 microns and less than or equal to 50 microns. For example, the thickness of the first portion 161 can be 10 microns, 15 microns, 20 microns, 25 microns, 30 microns, 35 microns, 40 microns, 45 microns, 50 microns, etc. This ensures the reliability of the display module 10 while preventing the first portion 161 from being too thick, which could lead to excessive thickness of the optical adhesive layer 13 bonded to the second main body 111, causing bubbling in the optical adhesive layer 13 and affecting the display quality of the display module 10.

[0096] See also Figure 11 , Figure 11 for Figure 1 Another cross-sectional structural diagram of the display module 10 of the electronic device 100 is shown. Figure 11 The embodiment shown is Figure 10The difference of the illustrated embodiment is that the display module further includes an ink layer 17, which is disposed on the surface of the second bent portion 112 of the transparent cover plate 11 facing the display panel 12. A portion of the ink layer 17 is located on the side of the first portion 161 of the protective layer 16 away from the second main portion 111, while another portion of the ink layer 17 is located between the first portion 161 and the second bent portion 112. Specifically, the edge of the first portion 161 is covered by the ink layer 17. A portion of the optical adhesive layer 13 is bonded to this edge of the first portion 161, meaning that a portion of the optical adhesive layer 13 is sandwiched between the ink layer 17 and the first bent portion 122 of the display panel 12. This maximizes the area of ​​the optical adhesive layer 13, preventing the edge of the optical adhesive layer 13 from being located between the display area of ​​the display panel 12 and the transparent cover plate 11, which could cause bubbles to form on the edge of the optical adhesive layer 13 and affect the display quality of the display module 10.

[0097] See also Figure 12 , Figure 12 for Figure 1 Another cross-sectional structural diagram of the display module 10 of the electronic device 100 is shown. Figure 12 The embodiment shown is Figure 11 The embodiment shown differs in that the edge of the ink layer 17 facing the second main portion 111 is connected to the edge of the first portion 161 of the protective layer 16 facing away from the second main portion 111. This ensures a uniform thickness across the first portion 161, facilitating the formation of the first portion 161 on the surface of the second bent portion 112 of the light-transmitting cover plate 11. It also facilitates a uniform thickness of the portion of the optical adhesive layer 13 located between the first bent portion 122 and the second bent portion 112, simplifying the design and assembly of the display module 10.

[0098] 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.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display module, characterized in that: include: a display panel comprising a first main body portion and a first bent portion, wherein the first bent portion is connected to an outer edge of the first main body portion; a light-transmitting cover plate, the light-transmitting cover plate being located on the display side of the display panel; the light-transmitting cover plate comprising a second main body portion and a second bent portion, the second bent portion being connected to an outer edge of the second main body portion, the second main body portion being stacked on the first main body portion, and the second bent portion being stacked on the first bent portion; an optical adhesive layer, the optical adhesive layer being disposed between the light-transmitting cover plate and the display panel; a protective layer, the protective layer comprising a first portion, the first portion being stacked and disposed between the first bending portion and the second bending portion; The first portion is sandwiched in the optical adhesive layer, and the strength of the first portion is greater than the strength of the optical adhesive layer; or the first portion is a coating covering the second bending portion.

2. The display module according to claim 1, wherein: The protective layer further includes a second portion, the second portion being connected to the first portion and stacked between the first main portion and the second main portion; The second portion is sandwiched in the optical adhesive layer, and the strength of the second portion is greater than the strength of the optical adhesive layer; or the second portion is a coating covering the second main body.

3. The display module according to claim 1, wherein: The first part is a coating covering the second bending part, and the orthographic projection of the protective layer on the first plane does not overlap with the orthographic projection of the first main body on the first plane; wherein the first plane is perpendicular to the stacking direction of the first main body and the second main body.

4. The display module according to claim 3, wherein: The first part is in a grid shape.

5. The display module according to claim 3 or 4, characterized in that: The first part is an organic coating.

6. The display module according to any one of claims 3 to 5, characterized in that: The first portion includes at least one of a polyphenylene ether layer, a polyimide layer, a polymethyl methacrylate layer, a polycarbonate layer, and a polyethylene terephthalate layer.

7. The display module according to any one of claims 1 to 6, characterized in that: The elastic modulus of the first portion is greater than the elastic modulus of the optical adhesive layer.

8. The display module according to claim 7, wherein: The elastic modulus of the first portion is greater than or equal to 1 GPa.

9. The display module according to any one of claims 1 to 8, wherein: The display module further includes: A polarizer is stacked between the light-transmitting cover plate and the display panel.

10. The display module according to claim 9, wherein: The polarizer is located between the optical adhesive layer and the display panel.

11. The display module according to claim 10, wherein: The protective layer is sandwiched in the optical adhesive layer, and the protective layer includes a quarter wave plate. The angle between the fast axis or the slow axis of the quarter wave plate and the transmission axis of the polarizer is 45°.

12. The display module according to any one of claims 1 to 11, characterized in that: The light transmittance of the protective layer is greater than or equal to 90%.

13. The display module according to any one of claims 1-2 and 7-12, characterized in that: The protective layer is sandwiched in the optical adhesive layer, and the protective layer includes at least one of a polymethyl methacrylate layer, an ultra-thin glass layer, and a polycarbonate layer.

14. The display module according to any one of claims 1 to 13, wherein: The thickness of the protective layer is greater than or equal to 10 microns and less than or equal to 100 microns.

15. The display module according to any one of claims 1 to 14, characterized in that: The display module further includes: An ink layer is provided on a surface of the second bending portion facing the display panel, at least a portion of the ink layer is located on a side of the first portion away from the second main body portion, and a portion of the optical adhesive layer is sandwiched between the ink layer and the first bending portion.

16. The display module according to any one of claims 1 to 15, characterized in that: The display module further includes: A buffer layer is stacked on a side of the display panel facing away from the light-transmitting cover plate.

17. An electronic device, characterized in that: include: case; A display module, wherein the display module is the display module according to any one of claims 1 to 16, and the display module is fixed to the housing.

Images