Screen mounting structure and electronic device

Abstract

Disclosed in the present application are a screen mounting structure and an electronic device. The screen mounting structure comprises a screen assembly and a middle frame. The screen assembly comprises a cover plate and a display module that are stacked, wherein the edge of the cover plate extends beyond the display module, and the edge of the display module has a flexible portion that bends and extends toward the side facing away from the cover plate, and the flexible portion is used for mounting a display drive chip. The middle frame comprises a middle plate and a frame arranged around the middle plate, wherein the middle plate is located on the side of the display module facing away from the cover plate, and the frame is bonded to the cover plate. The middle plate comprises a first area and a second area that are connected end to end and form a closed ring, wherein a filling adhesive which wraps part of the flexible portion is provided between the first area and the cover plate and display module, and the second area is bonded to the display module. By means of the screen mounting structure of the present application, visible black borders of a screen can be narrowed, thereby increasing the screen-to-body ratio; in addition, the overall anti-vibration effect of the electronic device is also improved.

Description

Screen mounting structure and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on January 24, 2024, with application number 202410096839.3 and application name “Screen Mounting Structure and Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic devices, and more particularly, to a screen mounting structure and an electronic device. Background Art

[0003] The smartphone screen primarily consists of a display module and a transparent cover. To prevent users from seeing halos and internal circuitry and to facilitate cover installation, the cover's translucent area is surrounded by an opaque region. The display module displays through the translucent region, and the opaque region is bonded to a step on the midframe with sealant to secure the screen and provide waterproofing for the smartphone's front cover.

[0004] To meet smartphone waterproofing requirements and ensure strong adhesion between the screen and the midframe, a certain amount of glue must be dispensed between the step on the midframe and the opaque area of ​​the cover. Therefore, when forming the cover, sufficient glue must be dispensed in the opaque area. This results in a wider area of ​​the cover occupying the opaque area, resulting in a wider black border and a lower screen-to-body ratio. Summary of the Invention

[0005] The purpose of this application is to provide a screen mounting structure and electronic device that ensures the installation reliability and waterproof sealing of the screen assembly and the middle frame by forming a two-ring sealing structure between the screen assembly and the middle frame. Compared with the related art, the screen mounting structure in this application has an additional ring of sealing structure, which reduces the requirement for the glue dispensing width between the cover plate and the frame. This eliminates the need to reserve an excessively wide opaque area on the cover plate, thereby achieving the effect of narrow black borders on the screen and increasing the screen-to-body ratio.

[0006] In a first aspect, the present application provides a screen mounting structure, including a screen assembly and a middle frame.

[0007] The screen assembly includes a stacked cover plate and a display module. The edge of the cover plate extends out of the display module. The edge of the display module has a flexible portion that is bent and extends toward the side facing away from the cover plate. The flexible portion is used to install a display driver chip.

[0008] The middle frame includes a middle plate and a frame arranged around the middle plate. The middle plate is located on the side of the display module facing away from the cover plate. The frame and the cover plate are bonded together by sealant.

[0009] The middle plate includes a first area and a second area connected end to end to form a closed ring. A filling glue covering part of the flexible part is provided between the first area, the cover plate and the display module. The second area is bonded to the display module.

[0010] The screen mounting structure in this application assumes that the second area and the display module are bonded by the first colloid, thereby forming two circles of sealing structure between the screen assembly and the middle frame. The outermost circle is the sealant between the frame and the cover plate, and the innermost circle is formed by the first colloid and the filling glue. Such a design ensures the installation reliability and waterproof sealing of the screen assembly and the middle frame. Compared with the related art, the screen mounting structure in this application has an additional circle of sealing structure formed by the first colloid and the filling glue, thereby reducing the requirement for the glue spot width between the cover plate and the frame, so that there is no need to reserve an excessive glue spot width on the cover plate. When the cover plate is processed and formed, the width requirement for the opaque area is reduced, making the visual black edge formed by the opaque area narrower, thereby improving the screen-to-body ratio.

[0011] In addition, a filling glue that covers the flexible part is provided between the first area and the cover plate and the display module, so that the vibration resistance of the electronic device is improved. The specific reason is: when the screen mounting structure of the present application is applied to the electronic device, the filling glue actually occupies a part of the space inside the electronic device. When the side of the electronic device with the filling glue falls to the ground, the generated vibration mechanical energy can be absorbed by the filling glue, or when the other side of the electronic device falls to the ground, the generated vibration mechanical energy is transmitted through the middle frame and can be partially absorbed by the filling glue. Regardless of the above situation, the vibration damage effect on the internal components of the electronic device is reduced, thereby improving the overall vibration resistance of the electronic device.

[0012] In a possible design, the cover plate is located on the inner peripheral side of the frame, and the edge of the cover plate is bonded to the inner side wall of the frame.

[0013] The cover is located on the inner side of the frame, and the frame can effectively protect the cover, ensuring the reliability of the cover when performing a drop test on the electronic device.

[0014] In a possible design, the cover plate is located on top of the frame, and an edge of the cover plate is bonded to the top of the frame.

[0015] The cover is located on top of the frame, creating a mounting step. This increases the adhesive dispensing area between the cover and the frame, further improving the overall seal between the screen assembly and the midframe. It's important to note that because the cover is placed on top of the frame, only the opaque area of ​​the cover forms the visible black border of the screen. Although the opaque area of ​​the cover is wider, the reduced frame width does not degrade the black border effect of the screen.

[0016] In one possible design, a retaining structure is provided on the side of the first area opposite to the frame, and the retaining structure, cover plate, display module, flexible part, middle plate, frame and sealant form a glue holding space for accommodating filling glue.

[0017] By adding a containment structure to limit the flow of the filling glue and prevent it from overflowing to other areas, the dispensing operation is facilitated. At the same time, there is no need for special requirements for the viscosity of the filling glue, and a low-cost low-viscosity colloid can be used, thereby reducing the purchase cost of the filling glue.

[0018] In one possible design, the second region is bonded to the display module via a first colloid, which is U-shaped. The enclosure structure includes a sealing member and the first colloid. The sealing member is strip-shaped and extends along the first region. At both ends of the U-shaped structure, the first colloid is connected to the sealing member, the cover plate, the frame, and the sealant.

[0019] The specific form of the enclosure structure is further defined, and can be composed of a first colloid and a sealant. Furthermore, the enclosure structure formed by the first colloid and the sealant also provides a waterproof seal, effectively forming a three-layer sealing structure on this side of the screen: the outer two layers are sealant and filler, and the innermost layer is the enclosure structure, thereby improving installation reliability and waterproof sealing on this side of the screen.

[0020] In one possible design, the second region is bonded to the display module via a second colloid, which is a U-shaped structure. The enclosure structure includes a sealant, a second colloid, and a third colloid. The sealant is strip-shaped and arranged along the extension direction of the first region. The third colloid includes a first sub-colloid and a second sub-colloid. At both ends of the U-shaped structure, the first sub-colloid is respectively connected to the middle plate, the second colloid, the display module, and the sealant. The second sub-colloid is respectively connected to the middle plate, the frame, the sealant, the cover plate, the display module, and the second colloid.

[0021] The specific form of the enclosure structure is further defined, and can be composed of a seal, a second colloid, and a third colloid. Furthermore, the enclosure structure composed of the seal, the second colloid, and the third colloid also has a waterproof sealing effect, thereby improving the installation reliability and waterproof sealing performance of the screen side.

[0022] In a possible design, the middle frame is provided with a glue injection hole and an air release hole for connecting the glue storage space with the outside world, and the glue injection hole and the air release hole are respectively located at two ends of the glue storage space.

[0023] By setting glue injection holes and air release holes at both ends of the glue holding space, the filling glue can fully fill the glue holding space to avoid leaving cavities, thereby ensuring the sealing between the screen assembly and the middle frame.

[0024] In a possible design, the glue injection hole and the air leakage hole are located on the first area of ​​the middle plate.

[0025] The glue injection holes and air vent holes are located on the first area of ​​the middle plate, which can prevent the holes from leaking out and affecting the aesthetics of the middle frame.

[0026] In a possible design, the glue injection hole and the air vent hole are located on the frame.

[0027] In a possible design, sealing pieces are provided in the glue injection hole and the air leakage hole.

[0028] The blocking piece blocks the hole and thus ensures the structural strength of the middle frame.

[0029] In a possible design, the display module includes a flexible substrate, and the flexible portion is a portion extending from the flexible substrate.

[0030] In a possible design, the display module includes a flexible substrate, the flexible portion is a flexible circuit board, and the flexible circuit board is connected to the flexible substrate.

[0031] In a possible design, an avoidance groove is provided on the inner side wall of the frame opposite to the flexible portion.

[0032] The design of the avoidance groove allows the frame to avoid the flexible part, thereby ensuring a certain safety distance between the flexible part and the frame. During assembly, the frame can be prevented from interfering with the flexible part. After being formed into a product, there is a sufficient safety distance between the flexible part and the frame. When falling and vibrating, the flexible part can be prevented from colliding with the frame, thereby ensuring the reliability of the flexible part.

[0033] In a second aspect, the present application further provides an electronic device comprising the above-mentioned screen mounting structure, and may further comprise a back cover and other functional components such as a camera module, a battery, and a microphone.

[0034] The electronic device in the present application forms two circles of sealing structures between the screen assembly and the middle frame. Compared with the related art, since there is an additional circle of sealing structure formed by the first colloid and the filling glue, the requirement for the glue spot width between the cover plate and the frame is reduced, so that there is no need to reserve an excessively large glue spot width on the cover plate. Therefore, when processing and forming the cover plate, the width requirement for the opaque area is reduced, so that the visual black edge formed by the opaque area becomes narrower, thereby increasing the screen-to-body ratio.

[0035] In addition, the filling glue actually occupies a part of the space inside the electronic device. When the side of the electronic device with the filling glue falls to the ground, the generated vibration mechanical energy can be absorbed by the filling glue, or when the other side of the electronic device falls to the ground, the generated vibration mechanical energy is transmitted through the middle frame and can be partially absorbed by the filling glue. In either case, the vibration damage effect on the internal components of the electronic device is reduced, thereby improving the overall vibration resistance of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG1 is a schematic diagram of a screen mounting structure of a smartphone in the related art;

[0037] FIG2 is a schematic diagram of a smart phone provided in an embodiment of the present application;

[0038] FIG3 is an exploded view of the smartphone in FIG2 ;

[0039] FIG4 is a schematic diagram of a screen installation structure provided in an embodiment of the present application;

[0040] FIG5 is a cross-sectional view of an example taken along line AA in FIG4 ;

[0041] FIG6 is a cross-sectional view of an example of BB in FIG4;

[0042] FIG7 is a schematic diagram of a screen assembly provided in an embodiment of the present application;

[0043] FIG8 is an enlarged view of point G in FIG7 ;

[0044] FIG9 is a schematic diagram of an example of a middle frame provided in an embodiment of the present application;

[0045] FIG10 is a cross-sectional view of another example of AA in FIG4;

[0046] FIG11 is a cross-sectional view of another example of BB in FIG4 ;

[0047] FIG12 is a schematic diagram of an example of a middle frame and enclosure structure provided in an embodiment of the present application;

[0048] FIG13 is a schematic diagram of an example of CC in FIG4 ;

[0049] FIG14 is a schematic diagram of FIG5 when no filling glue is provided;

[0050] FIG15 is a schematic diagram of another example of a middle frame and enclosure structure provided in an embodiment of the present application;

[0051] FIG16 is a schematic diagram of another example of CC in FIG4 ;

[0052] FIG17 is a schematic diagram of another example of a middle frame provided in an embodiment of the present application;

[0053] FIG18 is a schematic diagram of another example of AA in FIG4 ;

[0054] FIG19 is a schematic diagram of another example of AA in FIG4 ;

[0055] FIG. 20 is a schematic diagram of another example of AA in FIG. 4 .

[0056] Figure numerals: 10. Screen assembly; 11. Cover plate; 111. Light-proof area; 112. Light-transmitting area; 12. Display module; 121. Flexible part; 122. Display driver chip; 123. Flexible substrate; 13. Glue storage space; 20. Middle frame; 21. Middle plate; 211. First area; 212. Second area; 213. Glue injection hole; 214. Air vent; 22. Frame; 221. Blocking part; 222. Avoidance groove; 23. Step; 231. Sealant; 30. Enclosing structure; 31. First colloid; 32. Second colloid; 33. Third colloid; 331. First sub-colloid; 332. Second sub-colloid; 34. Filling glue; 35. Sealing part; 40. Back cover. DETAILED DESCRIPTION

[0057] The following is an illustrative introduction to the relevant contents that may be involved in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0059] In the description of this application, it should be understood that the terms "upper", "lower", "side", "inside", "outside", "top", "bottom", etc. indicate orientations or positional relationships based on the installation, and are only for the convenience of describing this application and simplifying the description, 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 should not be understood as a limitation on this application.

[0060] It should also be noted that, in the embodiments of the present application, the same reference numerals are used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or parts as an example. It should be understood that the reference numerals are also applicable to other identical parts or parts.

[0061] In the description of this application, it should be noted that the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may 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.

[0062] A high screen-to-body ratio is a major selling point in the mobile phone industry, and manufacturers are vying to introduce solutions with narrow black borders to achieve these high screen-to-body ratios. However, current mobile phone screen mounting structures cannot achieve this extremely narrow black border effect, hindering further increases in screen-to-body ratios. The specific reasons are as follows.

[0063] Figure 1 is a schematic diagram of a smartphone screen mounting structure in the related art. As shown in Figure 1 , the smartphone screen primarily consists of a display module 12 and a transparent cover plate 11. To prevent users from seeing halos and internal circuitry, and to facilitate installation of the cover plate 11, a circle of opaque areas 111 surrounds the translucent area 112 of the cover plate 11. The display module 12 is displayed through the translucent area 112. The opaque area 111 is bonded to the mounting step 23 on the middle frame 20 with sealant 231, securing the screen and providing a waterproof seal on the smartphone screen side.

[0064] Continuing with Figure 1, to meet smartphone waterproofing requirements and ensure bonding strength between the cover plate 11 and the middle frame 20, a certain glue-dispensing width is required between the mounting step 23 on the middle frame 20 and the opaque area 111 of the cover plate 11. Therefore, when forming the cover plate 11, at least sufficient glue-dispensing width must be reserved on the opaque area 111. This results in the opaque area 111 occupying a wider area on the cover plate 11, which in turn results in an excessively wide black border on the screen and a low screen-to-body ratio.

[0065] It can be seen that although the current mobile phone screen mounting structure can meet the reliability of screen installation and the waterproof requirements of the screen side, it cannot adapt to the development trend of narrow black borders and high screen-to-body ratio of smartphones.

[0066] In view of this, and to address the aforementioned technical issues, the present application provides a screen mounting structure and electronic device. By forming two rings of sealing structures between the screen assembly 10 and the middle frame 20, the mounting reliability and waterproof sealing of the screen assembly 10 and the middle frame 20 are ensured. Compared to related technologies, the screen mounting structure of the present application has an additional ring of sealing structures, thereby reducing the requirement for the glue dispensing width between the cover plate 11 and the frame 22. This eliminates the need to reserve an excessively wide opaque area 111 on the cover plate 11, thereby achieving the effect of a narrow black border on the screen and increasing the screen-to-body ratio.

[0067] The present application first provides an electronic device, which may also be referred to as a mobile device, terminal device, mobile terminal, or terminal. The electronic device includes but is not limited to a handheld device, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem. For example, the electronic device may include a smartwatch, a smartphone, a personal digital assistant (PDA), a tablet computer, a laptop computer, an in-vehicle computer, smart glasses, and other electronic devices with a screen that require a narrow black border design.

[0068] In order to more conveniently explain the electronic device provided in the embodiment of the present application, as an example rather than a limitation, the following will take the electronic device being a smart phone as an example to explain in detail the technical solution of the present application.

[0069] The smartphone provided in the embodiments of the present application will now be described in detail with reference to the accompanying drawings.

[0070] Figure 2 is a schematic diagram of a smartphone provided in an embodiment of the present application. Figure 3 is an exploded view of the smartphone in Figure 2.

[0071] As shown in Figures 2 and 3, the smartphone provided in the embodiment of the present application includes a screen assembly 10, a middle frame 20, and a back cover 40. The middle frame 20 further includes a middle plate 21 and a frame 22 arranged around the middle plate 21. The front face of the middle frame 20 is fixed with the screen assembly 10, and the rear face of the middle frame 20 is fixed with the back cover 40. The screen assembly 10, the middle frame 20, and the back cover 40 together define a storage space for the smartphone, which is used to install various functional components of the smartphone, such as a camera module, a battery, a microphone, and other functional components.

[0072] In addition, a smartphone may also include functional components such as a processor, a universal serial bus (USB) interface, a charging management module, a power management module, a mobile communication module, an antenna, a wireless communication module, an audio module, a headphone interface, a sensor module, buttons, and a subscriber identification module (SIM) card interface.

[0073] These functional elements can be changed according to user needs. It can be understood that the specific embodiment introduced above is only a specific implementation method of the present application. Other ways to implement the solution of the present application are also within the scope of protection of the present application and will not be described in detail here.

[0074] To facilitate the description of the following embodiments, an XYZ coordinate system is established for the smartphone. Specifically, the length of the smartphone is defined as the Y direction, the width of the smartphone is defined as the X direction, and the thickness of the smartphone is defined as the Z direction. The X direction, Y direction, and Z direction are mutually perpendicular.

[0075] The following is a detailed introduction to the technical solution of the screen mounting structure of the smartphone in the embodiment of the present application.

[0076] Figure 4 is a schematic diagram of a screen installation structure provided by an embodiment of the present application. Figure 5 is a cross-sectional view of an example of AA in Figure 4. Figure 6 is a cross-sectional view of an example of BB in Figure 4.

[0077] As shown in FIG. 4-FIG 6 , the screen mounting structure provided in the embodiment of the present application includes a screen assembly 10 and a middle frame 20 .

[0078] The screen assembly 10 includes a stacked cover plate 11 and a display module 12. The cover plate 11 includes a light-transmitting area 112 and an opaque area 111 surrounding the light-transmitting area 112. The edge of the cover plate 11 is the opaque area 111 of the cover plate 11, which extends beyond the display module 12. The display module 12 displays through the light-transmitting area 112.

[0079] The opaque area 111 of the cover plate 11 can prevent light leakage from the edge of the display module 12 and can also cover the many wiring traces at the edge of the display module 12. In addition, in the embodiments described below, the opaque area 111 is also used for bonding with the frame 22. The opaque area 111 of the cover plate 11 and the frame 22 form a visual black border on the smartphone screen. However, due to impact strength requirements, the frame 22 cannot usually be further narrowed. Therefore, how to reduce the width of the opaque area 111 on the entire cover plate 11 is the key to achieving narrow black borders and a high screen-to-body ratio.

[0080] Fig. 7 is a schematic diagram of the screen assembly 10 provided in an embodiment of the present application. Fig. 8 is an enlarged view of point G in Fig. 7 .

[0081] As shown in FIG. 7-FIG . 8 and FIG. 5 , the edge of the display module 12 has a flexible portion 121 that is bent and extends toward the side facing away from the cover plate 11 .

[0082] The flexible portion 121 is primarily used to mount a display driver integrated circuit (DDIC) 122, thereby electrically interconnecting the display module 12 and the display driver chip 122. The display driver chip 122 transmits drive signals and data to the display module 12 in the form of electrical signals. By controlling brightness and color, image information such as letters and images can be displayed on the display module 12.

[0083] The display driver chip 122 is installed on the side of the display module 12 facing away from the cover plate 11 through the flexible portion 121. This design allows the display driver chip 122 to be stacked with the display module 12, thereby reducing the number and size of components around the display module 12, which is conducive to a narrow black border design.

[0084] Optionally, there are two main configurations for the flexible portion 121: one is to form the flexible portion 121 from a flexible printed circuit board, electrically and mechanically interconnecting the flexible printed circuit board with the display module 12; the other is to form the flexible portion 121 directly from the display module 12, with a base extending outward from the display module 12 to form the flexible portion 121. These two configurations will be described in detail in the following embodiments.

[0085] FIG9 is a schematic diagram of an example of a middle frame 20 provided in an embodiment of the present application.

[0086] As shown in FIG9 and FIG5-6, the middle frame 20 includes a middle plate 21 and a frame 22 arranged around the middle plate 21. The middle plate 21 is located on the side of the display module 12 facing away from the cover plate 11. The frame 22 is bonded to the cover plate 11 by a sealant 231.

[0087] The middle plate 21 includes a first region 211 and a second region 212 connected end to end to form a closed ring. A filling glue 34 covering the flexible portion 121 is provided between the first region 211 and the cover plate 11 and the display module 12. The second region 212 is bonded to the display module 12.

[0088] Assuming that the second area 212 and the display module 12 are bonded via the first colloid 31 , the first colloid 31 and the filling glue 34 form a closed ring sealing structure between the screen assembly 10 and the middle frame 20 , thereby achieving sealed installation of the screen.

[0089] It can be seen that the screen mounting structure in the embodiment of the present application forms two circles of sealing structure between the screen assembly 10 and the middle frame 20. The outermost circle is the sealant 231 between the frame 22 and the cover plate 11, and the innermost circle is formed by the first colloid 31 and the filling glue 34. Such a design ensures the installation reliability and waterproof sealing of the screen assembly 10 and the middle frame 20. Compared with the related art in Figure 1, the screen mounting structure in the embodiment of the present application has an additional circle of sealing structure formed by the first colloid 31 and the filling glue 34, thereby reducing the requirement for the glue spot width between the cover plate 11 and the frame 22, so that there is no need to reserve an excessive glue spot width on the cover plate 11. When the cover plate 11 is processed and formed, the width requirement for the opaque area 111 is reduced, so that the visual black edge formed by the opaque area 111 becomes narrower, thereby improving the screen-to-body ratio.

[0090] The width of the opaque area 111 mentioned above can be understood as the length of the opaque area 111 in the Y direction in FIG. 5 , and can also be understood as the length of the opaque area 111 in the X direction in FIG. 6 .

[0091] In addition, a filling glue 34 covering the flexible portion 121 is provided between the first area 211 and the cover plate 11 and the display module 12, thereby improving the anti-vibration effect of the smartphone. The specific reason is that when the screen mounting structure of the embodiment of the present application is applied to a smartphone, the filling glue 34 actually occupies a portion of the space inside the smartphone. When the side of the smartphone with the filling glue 34 falls to the ground, the generated vibration mechanical energy can be absorbed by the filling glue 34, or when the other side of the smartphone falls to the ground, the generated vibration mechanical energy is transmitted through the middle frame 20 and can be partially absorbed by the filling glue 34. In either case, the vibration damage effect on the internal components of the smartphone is reduced, thereby improving the overall anti-vibration effect of the smartphone.

[0092] Optionally, the cover plate 11 may be bonded to the display module 12. For example, a colloid may be provided on the outer surface of the display module 12, and the colloid may be in a layered form, and the cover plate 11 may be connected to the display module 12 via the colloid.

[0093] Specifically, the colloid can be an optically clear adhesive (OCA), which is a double-sided bonding tape without a matrix material. It has the characteristics of colorless transparency, high light transmittance (total light transmittance > 99%), high adhesion, high temperature resistance, and UV resistance. It has a controlled thickness and can provide uniform spacing. It will not cause yellowing, peeling, or deterioration after long-term use.

[0094] Optionally, the cover plate 11 may be made of glass, acrylic (also called organic glass), crystal, quartz stone, or any other transparent hard material.

[0095] Optionally, the surface of the cover plate 11 includes a curved surface or a flat surface, or a combination of a curved surface and a flat surface, that is, a 2.5D cover plate 11 .

[0096] Optionally, the opaque area 111 may be formed on the transparent cover plate 11 by a silk-screen printing process.

[0097] Optionally, the filling glue 34 can be a light-curing glue, such as an ultraviolet (UV) curing glue. The UV curing glue is also called shadowless glue or photosensitive glue. It refers to a type of adhesive that must be cured by ultraviolet light. It can be used as an adhesive, and can also be used as a glue for paints, coatings, inks, etc.

[0098] Specifically, the curing principle of UV curing adhesive is that the photoinitiator (or photosensitizer) in the UV curing adhesive absorbs ultraviolet light under ultraviolet radiation to produce active free radicals or cations, which trigger monomer polymerization, cross-linking and branching chemical reactions, causing the adhesive to convert from liquid to solid within seconds.

[0099] Specifically, the curing lamp used for irradiation during curing can be a UVLED light source, which has no heat radiation and can emit single-band ultraviolet light of 365 / 385 / 395 / 405nm. For example, UV glue curing can use a UVLED light source that can emit a wavelength of 365nm.

[0100] Optionally, the filling glue 34 may also be a heat-curing glue, such as a polyurethane adhesive, which is a sealing colloid that is cured by a heat source, has good stability, produces no by-products after curing, and has good bonding strength and sealing properties.

[0101] Specifically, the curing principle of polyurethane adhesive is that after heating, the temperature reaches the coagulation point of the polyurethane adhesive, and then it changes from a paste state to a coagulated state.

[0102] As shown in FIG. 5-FIG . 6 , in an embodiment provided in the present application, the cover plate 11 is located on the inner peripheral side of the frame 22 , and the edge of the cover plate 11 is bonded to the inner wall of the frame 22 by a sealant 231 .

[0103] In this embodiment, the cover plate 11 is located on the inner peripheral side of the frame 22, and the frame 22 can effectively protect the cover plate 11, thereby ensuring the reliability of the cover plate 11 when performing a smartphone drop test.

[0104] Optionally, the sealant 231 may also be the UV curing adhesive, heat curing adhesive, optical adhesive, etc. mentioned above.

[0105] Fig. 10 is a cross-sectional view of another example taken along line AA in Fig. 4. Fig. 11 is a cross-sectional view of another example taken along line BB in Fig. 4.

[0106] As shown in FIG. 10 and FIG. 11 , in an embodiment provided in the present application, the cover plate 11 is located on the top of the frame 22 , and the edge of the cover plate 11 is bonded to the top of the frame 22 by a sealant 231 .

[0107] In this embodiment, the cover plate 11 is located at the top of the frame 22, so that the top of the frame 22 forms an installation step 23, thereby increasing the glue dispensing area between the cover plate 11 and the frame 22, thereby improving the overall sealing effect of the screen assembly 10 and the middle frame 20.

[0108] It should be noted that, in the aforementioned embodiment, it is mentioned that the opaque area 111 of the cover 11 and the frame 22 together form the visual black edge of the smartphone screen. In this embodiment, since the cover 11 is placed on top of the frame 22, only the opaque area 111 of the cover 11 forms the visual black edge of the smartphone screen. Although the opaque area 111 of the cover 11 is wider in this embodiment, the width of the frame 22 is omitted, and the black edge effect of the screen is not worsened.

[0109] Optionally, when setting the filling glue 34 between the first area 211 and the cover plate 11 and the display module 12, a high-viscosity, low-fluidity filling glue 34 can be selected, and there is no need to set the enclosure structure 30. The filling glue 34 can be directly dotted into the first area 211, and then the screen assembly 10 is covered. Wait for the filling glue 34 to completely cover the flexible part 121, and then perform the curing operation. After that, the middle plate 21 can be bonded to the cover plate 11 and the display module 12.

[0110] However, while the above method can achieve the dispensing operation of the filling glue 34, the high viscosity requirement of the filling glue 34 makes the purchase cost of the filling glue 34 high, and the dispensing operation is relatively difficult. In order to prevent the filling glue 34 from overflowing, strict process control is required, which in turn affects processing efficiency. Therefore, to solve this problem, the following embodiment will add an enclosure structure 30 to facilitate the dispensing operation of the filling glue 34.

[0111] Figure 12 is a schematic diagram of an example of the middle frame 20 and the enclosure structure 30 provided in an embodiment of the present application. To prevent excessive lines from affecting the illustration, the first region 211 and the second region 212 are not depicted in Figure 12. Figure 13 is a schematic diagram of an example of CC in Figure 4. Figure 14 is a schematic diagram of Figure 5 without the filler 34.

[0112] As shown in Figures 12-14 and again in Figure 9, in an embodiment provided in the present application, a retaining structure 30 is provided on the side of the first area 211 opposite to the frame 22, and the retaining structure 30, the cover plate 11, the display module 12, the flexible portion 121, the middle plate 21, the frame 22 and the sealant 231 are enclosed to form a glue-containing space 13 for accommodating the filling glue 34.

[0113] In this embodiment, by adding a blocking structure 30, the blocking structure 30 can form a blocking effect on the filling glue 34 to limit the flow of the filling glue 34 and prevent the filling glue 34 from overflowing to other areas, thereby facilitating the dispensing operation, reducing the manufacturing difficulty and improving the manufacturing efficiency; at the same time, there is no need for special requirements for the viscosity of the filling glue 34, and a low-cost low-viscosity colloid can be used, thereby reducing the purchase cost of the filling glue 34.

[0114] Optionally, the enclosure structure 30 can be composed of components such as foam, rubber blocks, and stop plates, and these components can be removed after performing the enclosure function.

[0115] Optionally, the enclosure structure 30 can also be composed of components such as glue, foam, rubber blocks, etc., and these components are integrated with the screen after performing the enclosure function and do not need to be removed.

[0116] As shown in Figures 12-13 and Figure 9, in one embodiment provided herein, the second region 212 is bonded to the display module 12 via a first colloid 31, which is a U-shaped structure. The enclosure structure 30 includes a sealing member 35 and the first colloid 31. The sealing member 35 is strip-shaped and is arranged along the extension direction of the first region 211. At both ends of the U-shaped structure, i.e., at positions indicated by D in Figure 12, the first colloid 31 is respectively connected to the sealing member 35, the cover plate 11, the frame 22, and the sealant 231.

[0117] In this embodiment, the specific configuration of the enclosure structure 30 is further defined, and it can be composed of a first colloid 31 and a sealing member 35. Furthermore, the enclosure structure 30 composed of the first colloid 31 and the sealing member 35 also provides a waterproof seal, effectively forming a three-layer sealing structure on this side of the screen: the outer two layers are the sealant 231 and the filler 34, and the innermost layer is the enclosure structure 30, thereby improving the installation reliability and waterproof seal of this side of the screen.

[0118] Optionally, the first colloid 31 may also be the UV curing adhesive, heat curing adhesive, optical adhesive, etc. mentioned above, or double-sided adhesive.

[0119] Double-sided tape is a roll of adhesive tape made from a paper, cloth, or plastic film substrate, coated evenly with an elastomeric or resin-based pressure-sensitive adhesive. The adhesive surface is protected by a release paper. The primary adhesive component is a mixture of epoxy resin, polypropylene plastic, and ethylene vinyl acetate.

[0120] Optionally, the sealing member 35 may also be made of the UV curing adhesive, heat curing adhesive, optical adhesive, etc. mentioned above, or foam, rubber pad, etc.

[0121] Figure 15 is a schematic diagram of another example of the middle frame 20 and the enclosure structure 30 provided in an embodiment of the present application. To prevent excessive lines from affecting the diagram, the first region 211 and the second region 212 are not drawn in Figure 15. Figure 16 is a schematic diagram of another example of CC in Figure 4.

[0122] As shown in Figures 15-16, and further shown in Figure 9, in one embodiment provided by the present application, the second region 212 is bonded to the display module 12 via a second colloid 32, and the second colloid 32 is in a U-shaped structure. The enclosure structure 30 includes a sealant 35, a second colloid 32, and a third colloid 33. The sealant 35 is in a strip shape and is arranged along the extension direction of the first region 211. The third colloid 33 includes a first sub-colloid 331 and a second sub-colloid 332. At both ends of the U-shaped structure, i.e., the position indicated by E in Figure 15, the first sub-colloid 331 is respectively connected to the middle plate 21, the second colloid 32, the display module 12, and the sealant 35, and the second sub-colloid 332 is respectively connected to the middle plate 21, the frame 22, the sealant 231, the cover plate 11, the display module 12, and the second colloid 32.

[0123] In this embodiment, the specific configuration of the enclosure structure 30 is further defined, and it can be composed of a sealant 35, a second colloid 32, and a third colloid 33. Furthermore, the enclosure structure 30, composed of the sealant 35, the second colloid 32, and the third colloid 33, also provides a waterproof seal, effectively forming a three-layer sealing structure on this side of the screen: the outer two layers are the sealant 231 and the filler 34, and the innermost layer is the enclosure structure 30, thereby improving the installation reliability and waterproof seal of this side of the screen.

[0124] Optionally, the second colloid 32 and the third colloid 33 may also be made of the UV curing adhesive, heat curing adhesive, optical adhesive, etc. mentioned above, or double-sided adhesive.

[0125] Optionally, when setting the filling glue 34 between the first area 211 and the cover plate 11 and the display module 12, the screen assembly 10 may not be covered first to enclose the glue space 13, but the filling glue 34 may be directly dotted into the open space surrounded by the middle plate 21, the enclosure structure 30 and the frame 22, and then the screen assembly 10 is covered. After the filling glue 34 completely covers the flexible part 121 and solidifies, the middle plate 21 can be bonded to the cover plate 11 and the display module 12. However, this method cannot ensure that the filling glue 34 completely fills the glue space 13, and cavities are easily formed. If this happens, the sealing between the screen assembly 10 and the middle frame 20 cannot be guaranteed. Therefore, in order to solve this problem, the following embodiment will ensure that the glue space 13 is completely filled with the filling glue 34 by opening a glue injection hole 213 and an air release hole 214.

[0126] In one embodiment provided in the present application, the middle frame 20 is provided with a glue injection hole 213 and an air release hole 214 that connect the glue storage space 13 with the outside world. The glue injection hole 213 and the air release hole 214 are respectively located at both ends of the glue storage space 13.

[0127] Before injecting the filling glue 34 into the injection hole 213, the enclosure structure 30 is first formed, and then the screen assembly 10 is covered on the frame 22, and the frame 22 and the cover plate 11 are bonded by the sealant 231 to ensure that the glue space 13 is closed. Finally, the filling glue 34 is injected into the glue space 13 through the injection hole 213. The air vent 214 can balance the air pressure in the glue space 13, so that the gas in the glue space 13 is fully discharged, and then the filling glue 34 can fully fill the glue space 13 to avoid leaving a cavity, thereby ensuring the sealing between the screen assembly 10 and the middle frame 20.

[0128] It can be seen that in this embodiment, by providing the glue injection holes 213 and the air release holes 214 at both ends of the glue holding space 13, the filling glue 34 can fully fill the glue holding space 13 to avoid leaving cavities, thereby ensuring the sealing between the screen assembly 10 and the middle frame 20.

[0129] Optionally, the glue injection holes 213 and the air release holes 214 at both ends of the glue holding space 13 may be provided on the first area 211 of the middle plate 21, or may be provided on the frame 22. The following embodiments will describe this in detail.

[0130] As shown in FIG. 9 , in an embodiment provided in the present application, the glue injection hole 213 and the air release hole 214 are located on the first area 211 of the middle plate 21 .

[0131] In this embodiment, the glue injection holes 213 and the air leakage holes 214 are located on the first area 211 of the middle plate 21 , which can prevent the holes from leaking out and affecting the aesthetics of the middle frame 20 .

[0132] FIG17 is a schematic diagram of another example of the middle frame 20 provided in an embodiment of the present application.

[0133] As shown in FIG. 17 , in an embodiment provided in the present application, the glue injection hole 213 and the air release hole 214 are located on the frame 22 .

[0134] FIG. 18 is a schematic diagram of another example of AA in FIG. 4 .

[0135] As shown in FIG. 18 , in an embodiment provided in the present application, a sealing member 221 is provided in the glue injection hole 213 and the air leakage hole 214 .

[0136] When the glue injection hole 213 and the air release hole 214 are opened on the frame 22, a sealing member 221 is set in the glue injection hole 213 and the air release hole 214 to ensure that the shape of the frame 22 is consistent and more beautiful. At the same time, the sealing member 221 seals the holes to ensure the structural strength of the frame 22.

[0137] When the glue injection hole 213 and the air release hole 214 are opened on the middle plate 21 , the blocking member 221 is set in the glue injection hole 213 and the air release hole 214 so that the blocking member 221 blocks the holes and thus ensures the structural strength of the middle plate 21 .

[0138] As shown in FIG. 5 , in an embodiment provided in the present application, an avoidance groove 222 is provided on the inner side wall of the frame 22 opposite to the flexible portion 121 .

[0139] In this embodiment, the avoidance groove 222 is designed to enable the frame 22 to avoid the flexible part 121, thereby ensuring a certain safety distance between the flexible part 121 and the frame 22, and preventing the frame 22 from interfering with the flexible part 121 during assembly. After being formed into a product, there is a sufficient safety distance between the flexible part 121 and the frame 22, which can prevent the flexible part 121 from colliding with the frame 22 during falling and vibration, thereby ensuring the reliability of the flexible part 121.

[0140] As mentioned above, the flexible portion 121 is constructed in two ways, which will be described in detail in the following two embodiments.

[0141] FIG19 is a schematic diagram of another example of AA in FIG4 .

[0142] As shown in FIG. 19 , in an embodiment provided in the present application, the display module 12 includes a flexible substrate 123 , and the flexible portion 121 is a portion extending from the flexible substrate 123 .

[0143] In this embodiment, the flexible substrate 123 of the display module 12 can be made of polyimide plastic (PI), so that the flexible substrate 123 has bendable, foldable, and rollable properties. Therefore, a portion of the flexible substrate 123 extending outward constitutes the flexible portion 121, and a display driver chip 122 (not shown in the figure) is mounted on the extended flexible substrate 123.

[0144] In this embodiment, the fixed installation method of the display driver chip 122 can be referred to as a chip on plastic (COP) package.

[0145] FIG. 20 is a schematic diagram of another example of AA in FIG. 4 .

[0146] As shown in FIG. 20 , in an embodiment provided in the present application, the display module 12 includes a flexible substrate 123 , and the flexible portion 121 is a flexible circuit board, which is connected to the flexible substrate 123 .

[0147] In this embodiment, the flexible substrate 123 of the display module 12 can be made of polyimide plastic, and the flexible part 121 is composed of a flexible circuit board. The end of the flexible circuit board is electrically and mechanically interconnected with the flexible substrate 123. The flexible circuit board has the properties of being bendable, foldable, and rollable. Therefore, the flexible circuit board can bend and extend to the side of the flexible substrate 123 facing away from the middle plate 21, and a display driver chip 122 (not shown in the figure) is installed on the flexible circuit board.

[0148] In this embodiment, the fixed installation method of the display driver chip 122 can be called a chip on film (COF) package.

[0149] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A screen mounting structure, characterized in that, Including: A screen assembly (10), including a cover plate (11) and a display module (12) arranged in a stacked manner. The edge of the cover plate (11) extends beyond the display module (12), and the edge of the display module (12) has a flexible portion (121) that is curved and extends towards the side facing away from the cover plate (11), and the flexible portion (121) is used to mount a display driving chip (122); A middle frame (20), including a middle plate (21) and a frame (22) arranged around the middle plate (21) in a circle. The middle plate (21) is located on the side of the display module (12) facing away from the cover plate (11), and the frame (22) is bonded to the cover plate (11) by a sealant (231); The middle plate (21) includes a first region (211) and a second region (212) that are connected end to end to form a closed ring. A filling glue (34) that wraps part of the flexible portion (121) is arranged between the first region (211) and the cover plate (11) and the display module (12), and the second region (212) is bonded to the display module (12).

2. The screen mounting structure according to claim 1, wherein The cover plate (11) is located on the inner peripheral side of the frame (22), and the edge of the cover plate (11) is bonded to the inner side wall of the frame (22).

3. The screen mounting structure according to claim 1, wherein The cover plate (11) is located on the top of the frame (22), and the edge of the cover plate (11) is bonded to the top of the frame (22).

4. The screen mounting structure according to claim 1, wherein, A retaining structure (30) is arranged on the side of the first region (211) facing the frame (22). The retaining structure (30), the cover plate (11), the display module (12), the flexible portion (121), the middle plate (21), the frame (22), and the sealant (231) enclose a glue-containing space (13) for accommodating the filling glue (34).

5. The screen mounting structure according to claim 4, characterized in that, The second region (212) is bonded to the display module (12) by a first glue (31), and the first glue (31) has a U-shaped structure; The retaining structure (30) includes a seal (35) and the first glue (31). The seal (35) is strip-shaped and is arranged along the extending direction of the first region (211). At both ends of the U-shaped structure, the first glue (31) is also respectively connected to the seal (35), the cover plate (11), the frame (22), and the sealant (231).

6. The screen mounting structure according to claim 4, characterized in that, The second region (212) is bonded to the display module (12) by a second glue (32), and the second glue (32) has a U-shaped structure; The enclosure structure (30) includes a seal (35), the second colloid (32), and a third colloid (33). The seal (35) is strip-shaped and arranged along the extension direction of the first region (211). The third colloid (33) includes a first sub-colloid (331) and a second sub-colloid (332). At both ends of the U-shaped structure, the first sub-colloid (331) is respectively in contact with the middle plate (21), the second colloid (32), the display module (12), and the seal (35), and the second sub-colloid (332) is respectively in contact with the middle plate (21), the frame (22), the sealant (231), the cover plate (11), the display module (12), and the second colloid (32).

7. The screen mounting structure according to any one of claims 4-6, characterized in that, The middle frame (20) is provided with a glue injection hole (213) and an air vent hole (214) that communicate the glue storage space (13) with the outside. The glue injection hole (213) and the air vent hole (214) are respectively located at both ends of the glue storage space (13).

8. The screen mounting structure according to claim 7, characterized in that, The glue injection hole (213) and the air vent hole (214) are located on the first region (211) of the middle plate (21).

9. The screen mounting structure according to claim 7, characterized in that, The glue injection hole (213) and the air vent hole (214) are located on the frame (22).

10. The screen mounting structure according to claim 8 or 9, characterized in that, Blocking members (221) are arranged in the glue injection hole (213) and the air vent hole (214).

11. The screen mounting structure according to any one of claims 1-6, 8-9, characterized in that, The display module (12) includes a flexible substrate (123), and the flexible part (121) is a part extending from the flexible substrate (123).

12. The screen mounting structure according to any one of claims 1-6, 8-9, characterized in that, The display module (12) includes a flexible substrate (123), and the flexible part (121) is a flexible circuit board, and the flexible circuit board is connected to the flexible substrate (123).

13. The screen mounting structure according to any one of claims 1-6, 8-9, characterized in that, An avoidance groove (222) is provided on the inner side wall of the frame (22) opposite to the flexible part (121).

14. An electronic device, characterized in that, Including the screen mounting structure according to any one of claims 1-13.

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