Display device

Abstract

The invention discloses a display device which is characterized in that the edge of a glass cover plate of the display device protrudes out of the edge of a display panel, the protruding part of the glass cover plate is connected with the other opposite side of a front frame and is opposite to the side wall of a middle frame, the front frame is arranged on the inner side of the middle frame, and the front frame is formed below the glass cover plate in a 3D dispensing or injection molding mode. Therefore, an avoiding gap between the front frame and the display module is reduced, and the width of the frame of the whole machine is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display device. BACKGROUND

[0002] In the field of display, especially in the development of foldable display devices (such as foldable screen mobile phones, foldable screen tablets, etc.), users have increasingly urgent demand for high screen ratio and narrow frame full-screen design. Full-screen design can significantly improve the visual immersion of the display device, and is one of the core development directions of the current industry.

[0003] In non-foldable display devices, manufacturers can effectively reduce the border of the whole machine by optimizing the structure of the display module, thinning the thickness of the middle frame wall, adjusting the assembly gap between the front frame and the display module, and other ways, to achieve the effect of approaching full-screen. However, for foldable display devices, due to the need to adapt to repeated folding use scenarios, the structure design faces many special restrictions, making it significantly more difficult to achieve narrow frame and full screen.

[0004] The border of the whole machine of the existing foldable display device is composed of the border of the display module, the clearance between each component, the thickness of the front frame, and other parts, and the border width is relatively large, which cannot realize the true full-screen design, and seriously affects the user's visual experience and product competitiveness.

[0005] Therefore, under the premise of ensuring the folding performance and structural stability of the foldable display device, how to optimize the structure design and connection method of each component to effectively reduce the border of the whole machine has become a technical problem to be solved in the field. SUMMARY

[0006] Embodiments of the present application provide a display device, which effectively narrows the border width of the display module through the position cooperation between the front frame, the glass cover plate and the middle frame, to at least partially solve the above technical problems.

[0007] In order to achieve the above purpose, a display device is provided, comprising: a middle frame, comprising a frame bottom and a side wall connected to the edge of the frame bottom; a front frame located in the middle frame, one side of the front frame being fixedly connected to the middle frame; a display module comprising a display panel and a glass cover plate located on the light-emitting side of the display panel, the glass cover plate being fixedly connected to the display panel; wherein the edge of the glass cover plate protrudes from the edge of the display panel, and the protruding part of the glass cover plate is connected to the opposite side of the front frame and faces the side wall of the middle frame.

[0008] Optionally, the front frame is formed between the frame bottom of the middle frame and the protruding portion of the glass cover plate by a 3D dispensing or injection molding process.

[0009] Optionally, the frame strip cross-sectional structure of the front frame has a first end connected to the middle frame, and a second end connected to the glass cover plate, wherein the width of the second end is greater than the width of the first end.

[0010] Optionally, the superimposed height of the front frame and the glass cover plate is less than or equal to the height of the side wall of the middle frame.

[0011] Optionally, the outer side of the front frame is arranged in a plane, and the outer side of the front frame is adjacent to the side wall of the middle frame.

[0012] Optionally, the end of the protruding portion of the glass cover plate is flush with the outer side surface of the front frame.

[0013] Optionally, the display module further comprises a rigid support plate, the rigid support plate is arranged at the bottom of the display panel, and the rigid support plate is connected to the frame bottom of the middle frame.

[0014] Optionally, the end of the display panel and the rigid support plate is arranged opposite to the inner side of the front frame, and a dislocation space is arranged between the end of the rigid support plate and the inner side of the front frame.

[0015] Optionally, the rigid support plate and the frame bottom of the middle frame are connected by a low modulus adhesive material, and the rigid support plate can displace in the dislocation space.

[0016] Optionally, the thickness of the low modulus adhesive material is 30um-100um, and the elastic modulus is 30-100Kpa.

[0017] The display device of the embodiment of the present application sets the front frame inside the middle frame, and forms the front frame below the glass cover plate by a 3D dispensing or injection molding process, thereby reducing the clearance between the front frame and the display module, and effectively reducing the overall frame width.

[0018] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in connection with the accompanying drawings in which:

[0020] Figure 1 is a schematic diagram of a display device frame structure in the prior art; Figure 2 is a schematic diagram of a display device frame structure provided in an exemplary embodiment of the present disclosure.

[0021] Reference Signs List: 100, display device; A-A, display area; 20, middle frame; 201, frame bottom; 202, side wall; 30, front frame; 401, display panel; 402, glass cover plate; 50, rigid support plate; 60, low modulus adhesive material; 70, explosion-proof film. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0023] Similar reference signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0024] Please refer to Figure 1In the prior art, to achieve the repeated folding function, the folding display device 100 usually needs to set multiple avoidance gaps between the display module and the front frame 30, the front frame 30 and the middle frame 20 to prevent component interference. The superposition of these gaps leads to an increase in the overall frame width, making it difficult to meet the user's demand for high screen-to-body ratio. For example, in the traditional structure, the glass cover plate 402 is close to flush with the edge of the display panel 401, the front frame 30 is fixed to the middle frame 20 by foam glue, and each component needs to reserve a misalignment space when folding, resulting in a frame area including the display module edge, the thickness of the front frame 30 and multiple avoidance gaps, and the overall width increases significantly. Specifically, in the transverse direction of the display device 100, the edge of the display area A-A of the display panel 401 and the edge of the glass cover plate 402 have a width A, the edge of the glass cover plate 402 and the inside of the front frame 30 have a width B, the frame thickness C of the front frame 30, the outer end face of the front frame 30 and the outer edge of the middle frame 20 have a distance D, and the frame width E of the display device 100 is A+B+C+D. Referring to Figure 2 The present application proposes a display device 100 including a middle frame 20, a front frame 30 and a display module. The middle frame 20 has a frame bottom 201 and a side wall 202, the front frame 30 is located in the middle frame 20 and is fixedly connected to one side of the middle frame 20, the display module includes a display panel 401 and a glass cover plate 402 fixed on the light emitting side thereof, and the glass cover plate 402 is provided with a blast-resistant film 70 on the surface. The edge of the glass cover plate 402 protrudes beyond the edge of the display panel 401, and the protruding part is connected to the other side of the front frame 30 and extends towards the side wall 202 of the middle frame 20.

[0025] The frame bottom 201 and the side wall 202 of the middle frame 20 form a bearing structure to provide a mounting basis for the front frame 30 and the display module, and the side wall 202 is used to define the overall profile of the display device 100. One side of the front frame 30 is fixed to the frame bottom 201 of the middle frame 20, and the other side is connected by the protruding part of the glass cover plate 402 to form a limiting support for the display module. The glass cover plate 402 of the display module covers the area between the front frame 30 and the side wall 202 of the middle frame 20 through the edge protrusion design, directly replacing the required avoidance gap in the traditional structure. The protruding part of the glass cover plate 402 is fixedly connected with the front frame 30 to ensure the structural stability when folding.

[0026] Specifically, the part of the glass cover plate 402 beyond the edge of the display panel 401 extends across the front frame 30 and extends to the direction of the side wall 202 of the middle frame 20. This design makes the glass cover plate 402 simultaneously assume the functions of covering the gap and connecting the structure, and the front frame 30 does not need to be additionally extended outward to match the position of the side wall 202 of the middle frame 20. During the bending process, the connection between the glass cover plate 402 and the front frame 30 serves as a stress release point, allowing slight deformation and avoiding cracking. Since the glass cover plate 402 directly covers the side wall 202 area of the middle frame 20, the outer wall of the front frame 30 does not need to reserve the traditional avoidance gap between the side wall 202 of the middle frame 20, thereby reducing the width of the frame superposition.

[0027] Compared with the prior art, the traditional scheme needs to set a first avoidance gap between the glass cover plate 402 and the inner wall of the front frame 30, and a second avoidance gap between the outer wall of the front frame 30 and the side wall 202 of the middle frame 20. The present scheme directly connects the protruding part of the glass cover plate 402 to the other side of the front frame 30 and covers the side wall 202 of the middle frame 20, integrating the two gaps into a single structure and eliminating the gap superposition effect. In addition, the rigid properties of the glass cover plate 402 can replace part of the front frame 30 structure, further reducing the contribution of the thickness of the front frame 30 to the width of the frame.

[0028] Through the above technical scheme, the present application can reduce the problem of increasing the width of the frame caused by the superposition of the avoidance gaps of multiple components in the folding display device 100. The edge extension design of the glass cover plate 402 integrates the connection structure between the front frame 30 and the middle frame 20, eliminates the need for traditional avoidance gaps, and enhances the bending reliability through cross-connection, thereby realizing a narrower overall frame and a higher screen-to-body ratio. Specifically, the above technical scheme eliminates the width B between the edge of the glass cover plate 402 and the inner side of the front frame 30, and the distance D between the outer end surface of the front frame 30 and the outer edge of the middle frame 20, relative to the prior art, and only has the width A between the edge of the display area A-A of the display panel 401 and the outer side edge of the front frame 30, and the frame thickness C of the outer frame. The frame width E of the display device 100 of the present application is A+B+C.

[0029] The present application further proposes that the front frame 30 is formed between the frame bottom 201 of the middle frame 20 and the protruding part of the glass cover plate 402 through a 3D dispensing or injection molding process.

[0030] The 3D dispensing refers to forming a connecting structure through a glue dispensing process in a three-dimensional space. Specifically, a dispensing device with precise flow control can be used to dispense glue in a preset path and thickness in the gap between the frame bottom 201 of the middle frame 20 and the glass cover plate 402, and the glue forms a connecting layer with spatial adaptability after solidification. The injection molding process refers to injecting molten material into a preformed mold to form a connecting structure. Specifically, a thermoplastic material can be used to flow and fill the space between the frame bottom 201 of the middle frame 20 and the glass cover plate 402 in the mold, and after cooling, an integrated front frame 30 structure that is tightly combined with the two is formed.

[0031] Specifically, the 3D dispensing process can form a continuous and uniform adhesive layer in the non-planar contact area of the frame bottom 201 of the middle frame 20 and the protruding part of the glass cover plate 402 by controlling the distribution form of the glue in the three-dimensional direction, eliminating the assembly gap required by traditional planar adhesive tape pasting. The injection molding process uses the characteristics of mold forming to make the front frame 30 material completely fill the complex space between the middle frame 20 and the glass cover plate 402, forming a gap-free wrapped connecting structure. Both processes replace the physical avoidance gap required by traditional planar bonding through precise distribution of materials in the spatial dimension, thereby compressing the connection area width of the front frame 30 and adjacent components.

[0032] Compared with the prior art, the traditional front frame 30 is fixed between the middle frame 20 and the glass cover plate 402 by planar pasting with foam glue or double-sided adhesive tape, and a large gap is required in the bending direction to avoid glue layer cracking caused by stress concentration. The present scheme forms a spatially matched stress buffer area for the front frame 30, the middle frame 20, and the glass cover plate 402 through a three-dimensional forming connecting structure, eliminating the need for additional assembly gap, while maintaining the structural stability during bending.

[0033] Through the above technical solutions, the present application can eliminate the avoidance gap required by the traditional planar bonding process, reduce the connection area width of the front frame 30 and adjacent components, thereby reducing the overall border size of the machine and improving the screen-to-body ratio of the foldable display device 100.

[0034] The present application further proposes that the frame strip cross-sectional structure of the front frame 30 has a first end connected to the middle frame 20, and a second end connected to the glass cover plate 402, and the width of the second end is greater than the width of the first end.

[0035] The first end refers to the end region of the front frame 30 in contact with the frame bottom 201 of the middle frame 20, which can be formed by an injection molding process to match the surface of the middle frame 20 to achieve stable structural connection. This design reduces the assembly space requirement of the front frame 30 and the middle frame 20.

[0036] The second end refers to the end region of the front frame 30 in contact with the protruding part of the glass cover plate 402, which can extend to the edge below the glass cover plate 402 in the form of a trapezoidal or wedge-shaped cross section to increase the bonding strength by increasing the contact area. This design can disperse the stress transmitted to the connection part during the bending process.

[0037] Specifically, the cross section of the front frame 30 expands from the first end to the second end, and the narrow structure of the first end is suitable for the installation space limitation of the frame bottom 201 of the middle frame 20, and the expanded width of the second end covers the bottom surface area of the protruding part of the glass cover plate 402. During the folding operation, the lateral displacement of the connection between the glass cover plate 402 and the front frame 30 is effectively constrained by the widened second end, avoiding connection failure due to local stress concentration. The structure of wide on the cross section and narrow on the bottom makes the front frame 30 meet the dual requirements of connection stability of the middle frame 20 and support strength of the glass cover plate 402 in a limited space, thereby eliminating the necessity of reserving additional clearance due to insufficient structural strength.

[0038] Through the above technical solutions, the present application solves the problem of the need to reserve a large clearance gap due to insufficient structural strength at the connection between the front frame 30 and the glass cover plate 402, improves the connection reliability by optimizing the cross section shape of the front frame 30, and reduces the assembly gap between the glass cover plate 402 and the front frame 30, thereby providing a structural basis for reducing the width of the whole machine frame.

[0039] The present application further proposes a technical solution in which the superimposed height of the front frame 30 and the glass cover plate 402 is less than or equal to the height of the side wall 202 of the middle frame 20.

[0040] The superimposed height refers to the total thickness of the front frame 30 and the glass cover plate 402 in the thickness direction of the display device 100, which can be achieved by adjusting the thickness parameter of the front frame 30 forming process or the extension length of the edge of the glass cover plate 402. This parameter control can avoid the superposition of the two exceeding the accommodation range of the side wall 202 of the middle frame 20. The height of the side wall 202 refers to the extension size of the side wall 202 of the middle frame 20 in the thickness direction of the display device 100, which can be limited by mold processing or structural design to the maximum height. This parameter is set to the minimum height value required for the middle frame 20 to wrap the internal components.

[0041] Specifically, the total thickness of the front frame 30 and the glass cover plate 402 in the thickness direction of the display device 100 is limited within the height of the side wall 202 of the middle frame 20, so that the assembly structure of the two is completely accommodated in the space formed by the side wall 202. During folding, the superimposed area of the front frame 30 and the glass cover plate 402 is constrained by the side wall 202, avoiding the expansion of the superimposed structure due to bending stress. At the same time, this height matching relationship eliminates the need to increase the thickness of the side wall 202 in the traditional structure to accommodate the superimposed height, so that the side wall 202 of the middle frame 20 can maintain a compact wrapping form, thereby reducing the assembly gap space between the outside of the front frame 30 and the side wall 202.

[0042] Compared with the prior art, the superimposed height of the front frame 30 and the glass cover plate 402 in the conventional folding display device 100 usually exceeds the height of the side wall 202 of the middle frame 20, resulting in the forced thickening of the side wall 202 to form a space for accommodation, thereby increasing the overall frame thickness. The present scheme precisely controls the matching relationship between the superimposed height and the height of the side wall 202, ensuring the stability of the bending process, so that the side wall 202 of the middle frame 20 does not need to increase the redundant thickness to accommodate the superimposed structure, thereby directly reducing the lateral size of the frame.

[0043] Through the above technical scheme, the present application effectively solves the problem of frame thickening caused by the excessive superimposed height of the front frame 30 and the glass cover plate 402 in the folding display device 100, and realizes the compression of the frame thickness through the height matching of the structure, while maintaining the stable support relationship between the components during the bending process.

[0044] The present application further proposes that the outside of the front frame 30 is arranged in a plane, and the outside of the front frame 30 is adjacent to the side wall 202 of the middle frame 20.

[0045] The outside of the front frame 30 arranged in a plane means that the side surface of the front frame 30 in contact with the side wall 202 of the middle frame 20 is processed into a flat surface without curvature, which can be realized by precise injection molding process, and the flatness error is controlled within 0.05 millimeters. The plane structure can eliminate the assembly gap caused by the curvature deviation when the curved surface is in contact.

[0046] The outside of the front frame 30 is adjacent to the side wall 202 of the middle frame 20, which means that the plane outside of the front frame 30 directly abuts on the inner surface of the side wall 202 of the middle frame 20, which can be realized by assembly calibration using positioning clamps, and there is no need to set a buffer layer or a transition structure between the contact surfaces. The abutment relationship makes the outside of the front frame 30 completely within the coverage range of the side wall 202 of the middle frame 20.

[0047] Specifically, in the folding process of the folding display device 100, the outer side plane of the front frame 30 and the inner plane of the side wall 202 of the middle frame 20 form a surface contact fit. When the display device 100 is in an unfolded state, the outer side plane of the front frame 30 and the inner plane of the side wall 202 of the middle frame 20 are completely fitted, eliminating the natural gap caused by the mismatch of the curvature in the traditional curved contact mode. In the folded state, the front frame 30 and the side wall 202 of the middle frame 20 still maintain plane sliding contact, avoiding structural deformation caused by local stress concentration of the contact surface. The structure design of the outer side plane of the front frame 30 directly abutting the side wall 202 of the middle frame 20 eliminates the need for foam glue or transition supports used to fill the gap in traditional solutions, reducing the horizontal distance from the outer wall of the front frame 30 to the outer edge of the middle frame 20 to the thickness of a single plane contact surface.

[0048] Compared with the prior art, the outer side of the front frame 30 of the traditional folding display device 100 is designed in an arc shape, forming line contact or point contact with the arc-shaped inner wall of the side wall 202 of the middle frame 20, and there is a 0.1-0.3 millimeter assembly tolerance gap in the contact area. The present scheme compresses the contact gap to below 0.05 millimeters through plane contact, while eliminating the gap fluctuations caused by bending deformation in traditional curved contact.

[0049] Through the above technical scheme, the present application effectively solves the assembly gap accumulation problem caused by curved contact when connecting the front frame 30 and the side wall 202 of the middle frame 20, reduces the horizontal space occupied by the outer side of the front frame 30 to the outer edge of the middle frame 20 to the thickness of a single plane contact structure, and compresses the overall frame width to the contact surface coverage range of the outer side of the front frame 30 and the side wall 202 of the middle frame 20, realizing seamless transition of the display module edge and the inner side of the middle frame 20 of the display device 100.

[0050] The present application further proposes that the end of the protruding portion of the glass cover plate 402 is flush with the outer side surface of the front frame 30.

[0051] The protruding portion of the glass cover plate 402 refers to the area where the edge of the glass cover plate 402 exceeds the edge of the display panel 401, which is used to cover the assembly joint of the outer side of the front frame 30. The flush setting means that the end of the glass cover plate 402 is in the same plane as the outer side surface of the front frame 30, which can be achieved by adjusting the machining precision of the edge of the glass cover plate 402 and the forming angle of the outer side of the front frame 30, eliminating the height difference between the two.

[0052] Specifically, the glass cover plate 402 is beyond the display panel 401, and the end thereof forms a continuous plane with the outer side surface of the front frame 30 without a step. In the folding deformation process, the contact surface of the glass cover plate 402 and the front frame 30 remains in a planar contact state without a reserved clearance for avoiding interference. Since the end of the glass cover plate 402 is directly aligned with the outer side of the front frame 30, the front frame 30 does not need to be provided with an additional extension structure to cover the edge of the glass cover plate 402, thereby reducing the thickness of the front frame 30 itself and the superimposed effect on the overall machine frame.

[0053] Compared with the prior art, the end of the glass cover plate 402 in the conventional folding display device 100 is different in height from the outer side of the front frame 30, and a clearance for avoiding interference is reserved between the two to prevent interference. The present application directly eliminates the clearance by flush arrangement to form a continuous plane between the glass cover plate 402 and the outer side of the front frame 30, and avoids the thickness increase caused by the additional covering structure on the outer side of the front frame 30.

[0054] Through the above technical solutions, the present application effectively reduces the assembly clearance between the glass cover plate 402 and the front frame 30, reduces the width superimposed effect of the overall machine frame, improves the structural compactness of the folding display device 100, and realizes the full-screen design of a narrower frame.

[0055] The present application further proposes that the display module further comprises a rigid support plate 50, which is arranged at the bottom of the display panel 401, and the rigid support plate 50 is connected with the frame bottom 201 of the middle frame 20.

[0056] The rigid support plate 50 refers to a flat plate structure with high rigidity, which can be made of metal or composite material, and is used to provide bottom support for the display panel 401. This feature enhances the bending deformation resistance of the display module and reduces the risk of uneven stress on the panel.

[0057] The connection with the frame bottom 201 of the middle frame 20 means that the rigid support plate 50 is directly combined with the bottom area of the middle frame 20 by physical fixation, which can be achieved by adhesion. This feature changes the indirect connection layout between the traditional support plate and the front frame 30, forming a more direct stress transmission path.

[0058] Specifically, the rigid support plate 50 supports the bottom of the display panel 401, and the connection of the rigid support plate 50 with the frame bottom 201 of the middle frame 20 enables the bending stress to be directly transmitted to the bottom area of the middle frame 20 through the rigid support plate 50. This layout avoids stress concentration at the connection between the front frame 30 and the glass cover plate 402, thereby reducing the required clearance between the front frame 30 and the glass cover plate 402. At the same time, the connection mode of the rigid support plate 50 and the frame bottom 201 provides a structural basis for subsequent flexible connection technologies such as low modulus adhesive 60, so that the support plate can produce controllable displacement to release internal stress when bending.

[0059] Compared with the prior art, the existing folding display device 100 usually adopts a flexible support plate or indirectly fixes the support plate through the front frame 30, causing the support plate to be unable to effectively transmit stress when bending, and a large gap needs to be reserved between the front frame 30 and the glass cover plate 402. The present scheme directly connects the rigid support plate 50 and the frame bottom 201, disperses stress to the bottom of the middle frame 20, reduces the gap requirement of the front frame 30 region, and simultaneously realizes stress release through the combination of the rigid support plate 50 and the flexible connection mode.

[0060] Through the above technical scheme, the present application can reduce the gap width between the display module and the front frame 30, optimize the stress transmission path in the bending process, avoid component deformation or damage caused by stress concentration, and thus provide structural support for reducing the overall frame.

[0061] The present application further proposes that the end of the display panel 401 and the rigid support plate 50 is arranged opposite to the inner side of the front frame 30, and a dislocation space is arranged between the end of the rigid support plate 50 and the inner side of the front frame 30.

[0062] The dislocation space refers to a gap region allowing displacement between the end of the rigid support plate 50 and the inner side of the front frame 30, which can be realized by adjusting the size of the rigid support plate 50 or changing the profile of the inner side of the front frame 30. The space provides a buffer area for the deformation of the rigid support plate 50 during bending.

[0063] The relative arrangement refers to a non-contact space corresponding relationship formed between the display panel 401 and the end of the rigid support plate 50 and the inner side of the front frame 30, which can be realized by alignment assembly or misalignment assembly. This arrangement forms an adjustable assembly boundary to adapt to bending deformation.

[0064] Specifically, the end of the display panel 401 and the rigid support plate 50 is configured to maintain a non-contact state with the inner side of the front frame 30, and the dislocation space formed therebetween allows the rigid support plate 50 to produce a small displacement in a direction parallel to the display panel 401 when the device is bent. When internal stress is caused by bending of the device, the rigid support plate 50 releases stress through displacement in the dislocation space, avoiding rigid collision with the front frame 30. At the same time, the existence of the space makes it unnecessary to reserve a large gap between the display module and the front frame 30, thereby providing a structural condition for reducing the overall frame width.

[0065] Compared with the prior art, the rigid support plate 50 and the middle frame 20 in the traditional scheme adopt a full-laminated fixed mode, and a large gap must be reserved between adjacent components due to the inability to release stress when bending. The present scheme realizes stress release through the dislocation space, so that the gap between adjacent components can be compressed to a smaller range while maintaining the stability of the bending action.

[0066] By the above technical solution, the application solves the problem of gap reduction limitation caused by too strong connection of the rigid support plate 50, so that the avoiding gap between the display module and the front frame 30 can be reduced, thereby reducing the overall machine frame width and providing structural support for the full-screen design of the folding display device 100.

[0067] The application further proposes that the rigid support plate 50 and the frame bottom 201 of the middle frame 20 are connected by low-modulus adhesive 60, and the rigid support plate 50 can displace within the dislocation space.

[0068] The low-modulus adhesive 60 refers to an adhesive material with low elastic modulus, which can be implemented by using silicone or polyurethane adhesive, and its elastic deformation capacity can absorb the stress generated during bending. The dislocation space refers to the gap between the end of the rigid support plate 50 and the inner side of the front frame 30, which can be formed by adjusting the size of the rigid support plate 50 or the structure of the front frame 30 to provide displacement allowance for the rigid support plate 50 to avoid component interference.

[0069] Specifically, during bending, the low-modulus adhesive 60 deforms elastically under the action of external force, causing the rigid support plate 50 to displace slightly in a direction parallel to the frame bottom 201. The displacement is limited within the dislocation space to avoid contact or friction between the rigid support plate 50 and the inner side of the front frame 30. Through the elastic buffering effect of the adhesive, the stress between the rigid support plate 50 and the middle frame 20 is released, thereby reducing the risk of component deformation caused by stress concentration during bending.

[0070] In some specific embodiments, the low-modulus adhesive 60 can be coated on the entire surface of the rigid support plate 50 in contact with the frame bottom 201 to form a uniform adhesive layer. The width of the dislocation space can be adaptively adjusted according to the bending angle and displacement, for example, by controlling the distance between the inner side of the front frame 30 and the end of the support plate.

[0071] Compared with the prior art, the existing folding display device 100 usually uses high-modulus adhesive or screws to fix the rigid support plate 50, resulting in that the stress cannot be released during bending and a large avoiding gap needs to be reserved. The present solution allows the displacement of the support plate while ensuring its stability through the flexible connection characteristics of the low-modulus adhesive 60, thereby significantly reducing the requirement for avoiding gap.

[0072] By the above technical solution, the application solves the problem of too large avoiding gap caused by the fact that the bending stress cannot be released, so that the gap between the front frame 30 and the middle frame 20 can be reduced, thereby reducing the overall machine frame width and improving the bending reliability.

[0073] The application further proposes a technical solution in which the thickness of the low-modulus adhesive 60 is 30um~100um, and the elastic film amount is 30~100Kpa.

[0074] wherein the low modulus adhesive 60 refers to an adhesive material with a lower elastic modulus, which can be realized by using a silicon-based elastomer or a polyurethane modified adhesive material, and the molecular chain structure thereof has high flexibility and reversible deformation capability.

[0075] wherein the thickness of 30um~100um refers to the vertical dimension of the adhesive material after curing, which can be realized by adjusting the path width or pressure parameters of the dispensing process, and the thickness range can balance the bonding strength and displacement buffering requirements.

[0076] wherein the elastic film amount of 30~100Kpa refers to the stress-strain relationship parameter of the adhesive material under stress, which can be realized by adjusting the cross-linking density of the polymer or the content of the plasticizer, and the parameter range can take into account the structure fixation and stress release functions.

[0077] Specifically, in the folding display device 100, the rigid support plate 50 is connected with the middle frame 20 through the low modulus adhesive 60. When the device is bent, the relative displacement occurs between the rigid support plate 50 and the middle frame 20, and the low modulus adhesive 60 is compressed and deformed in the thickness direction, and at the same time, shear deformation occurs in the plane direction. The elastic film amount of the adhesive material absorbs mechanical energy during the bending process, converts the displacement of the rigid support plate 50 into recoverable deformation inside the adhesive layer, and avoids the stress from being transmitted to the surrounding structure. The thickness of the adhesive material not only ensures that the bonding surface has sufficient contact area to maintain the connection strength under normal conditions, but also provides physical buffering space for bending deformation. The synergistic effect of the two enables the rigid support plate 50 to perform controllable displacement in the dislocation space without the need to set a large relief gap.

[0078] Compared with the prior art, the traditional scheme uses a high modulus adhesive to fix the rigid support plate 50, and the high rigidity connection method causes the stress to be unable to be effectively released when bending, so a large relief gap must be provided between the front frame 30 and the support plate to prevent structural interference. The present scheme realizes stress dissipation by the elastic deformation characteristics of the low modulus adhesive 60 while maintaining the stability of the connection, so that the size of the relief gap can be reduced to less than 50% of the traditional scheme.

[0079] Through the above technical scheme, the present application can reduce the stress concentration phenomenon at the connection between the rigid support plate 50 and the middle frame 20 during the bending process, and avoid the peeling of the adhesive layer or the deformation of the structure caused by stress accumulation. At the same time, due to the reduction of the relief gap, the transverse space from the edge of the display module to the side wall 202 of the middle frame 20 is compressed, providing a structural basis for realizing a narrow frame design. The present scheme significantly improves the screen-to-body ratio of the display area while ensuring the reliability of the bending.

[0080] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0081] The embodiments, implementation manners and related technical features of the present application can be combined with each other without conflict.

[0082] The above is only the preferred embodiments of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical solution of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A display device, characterized by comprising: The application relates to a mobile phone, which comprises a middle frame, a front frame, a display module and a glass cover plate. The middle frame comprises a frame bottom and a side wall connected to the edge of the frame bottom. The front frame is fixedly connected to one side of the middle frame. The display module comprises a display panel and the glass cover plate fixedly connected to the light-emitting side of the display panel. The edge of the glass cover plate protrudes from the edge of the display panel, and the protruding part of the glass cover plate is connected to the opposite side of the front frame and faces the side wall of the middle frame.

2. The display device according to claim 1, wherein The front frame is formed between the frame bottom of the middle frame and the protruding part of the glass cover plate through a 3D dispensing or injection molding process.

3. The display device according to claim 2, wherein The frame strip cross-section structure of the front frame has a first end connected to the middle frame and a second end connected to the glass cover plate, wherein the width of the second end is greater than the width of the first end.

4. The display device according to claim 2, wherein The superimposed height of the front frame and the glass cover plate is less than or equal to the height of the side wall of the middle frame.

5. The display device according to claim 4, wherein The outer side of the front frame is arranged in a plane, and the outer side of the front frame is adjacent to the side wall of the middle frame.

6. The display device according to claim 4, wherein The end of the protruding part of the glass cover plate is flush with the outer side surface of the front frame.

7. The display device according to claim 1, wherein The display module further comprises a rigid support plate arranged at the bottom of the display panel, and the rigid support plate is connected to the frame bottom of the middle frame.

8. The display device according to claim 7, wherein The end of the display panel and the rigid support plate is arranged opposite to the inner side of the front frame, and a dislocation space is arranged between the end of the rigid support plate and the inner side of the front frame.

9. The display device of claim 8, wherein, The rigid support plate and the frame bottom of the middle frame are connected through low-modulus adhesive, and the rigid support plate can be displaced in the dislocation space.

10. The display device according to claim 9, wherein The thickness of the low-modulus adhesive is 30-100 um, and the elastic modulus is 30-100 Kpa.

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