Display module and display device

Abstract

The utility model discloses a display module and a display device, and belongs to the technical field of display. The display module comprises a buffer structure, a display panel and a cover plate structure. The buffer structure is located on the side, away from the display portion of the display panel, of the bent portion of the display panel, the first end of the buffer structure is connected with the face, close to the display panel, of the cover plate structure, and the second end of the buffer structure is connected with the face, away from the display portion, of the connecting portion. Thus, the buffer structure is arranged on the outer side of the bending part of the display panel to protect the bending part, the bending part can be prevented from being damaged by external impact force, and the buffer structure can also play a dustproof and waterproof role on the bending part of the display panel.

Description

Technical Field

[0001] The utility model relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] At present, display devices are used more and more widely, and commonly used display devices include smart phones, tablet computers, smart watches, etc. With the development of the times, the display device includes a display module, which is used to display images.

[0003] A display module includes a display panel and a circuit board. The display panel has a display portion and a bending portion located on one side of the display portion. The circuit board is located on the side of the display panel away from the display surface. The display panel is electrically connected to the circuit board through the bending portion by bending the bending portion to the side away from the display surface.

[0004] However, the bent portion of the display panel is more susceptible to damage from the external environment. Utility Model Content

[0005] The embodiment of the utility model provides a display module and a display device. The technical solution is as follows:

[0006] According to a first aspect of the utility model, a display module is provided, the display module comprising: a buffer structure and a stacked display panel and cover plate structure;

[0007] The cover plate structure comprises a first area and a second area located outside the first area, and the orthographic projection of the display panel on the cover plate structure is located in the first area;

[0008] The display panel comprises a display portion, and a bending portion and a connecting portion extending from an edge of the display portion and connected in sequence, wherein the bending portion and the connecting portion are located on a side of the display portion away from the cover plate structure;

[0009] The buffer structure is located on a side of the bending portion away from the display portion, the first end of the buffer structure is connected to a side of the cover structure close to the display panel, the orthographic projection of the first end of the buffer structure on the cover structure is located in the second area, and the second end of the buffer structure is connected to a side of the connecting portion away from the display portion.

[0010] Optionally, the buffer structure comprises a stretching portion and a supporting portion connected to each other, the length of the stretching portion in a first direction and the length of the supporting portion in the first direction are both the same as the length of the buffer structure in the first direction, and the first direction is a direction parallel to the first edge of the display portion;

[0011] The elastic modulus of the stretching portion is smaller than the elastic modulus of the supporting portion.

[0012] Optionally, the stretching portion includes a first mesh structure and a first filling structure, the first mesh structure includes a plurality of first meshes, and at least a portion of the first filling structure is located in at least a portion of the first meshes among the plurality of first meshes.

[0013] Optionally, the first filling structure includes a plurality of first filling parts, the plurality of first filling parts correspond one-to-one to the plurality of first meshes, and each of the first filling parts is located in a corresponding first mesh.

[0014] Optionally, the first filling structure further includes a first filling layer, the first filling layer covers one side of the first mesh structure and is connected to the plurality of first filling parts;

[0015] The elastic modulus of the first filling structure is smaller than the elastic modulus of the support portion.

[0016] Optionally, the buffer structure includes at least one stretching portion and at least two supporting portions, and one stretching portion is located between two adjacent supporting portions.

[0017] Optionally, the buffer structure includes a plurality of the stretching portions and a plurality of the supporting portions, and the plurality of the stretching portions and the plurality of the supporting portions are arranged alternately.

[0018] Optionally, the ratio of the area of ​​the stretching portion to the area of ​​the buffer structure is in a range of 10% to 60%.

[0019] Optionally, the elastic modulus of the support portion is greater than or equal to 1 GPa, and the elastic modulus of the stretching portion is less than or equal to 100 MPa;

[0020] The thickness of the buffer structure ranges from 20 microns to 80 microns.

[0021] Optionally, the display module further comprises a stress protection layer, wherein the stress protection layer is located on a side of the bending portion away from the display portion, and the display portion has a display surface;

[0022] The shortest distance between the buffer structure and the stress protection layer in a direction parallel to the display surface is less than or equal to 0.3 mm, and the shortest distance between the buffer structure and the stress protection layer in a direction perpendicular to the display surface is less than or equal to 0.2 mm.

[0023] Optionally, the plurality of support parts include a first support part, a second support part, a third support part and a fourth support part, the plurality of stretching parts include a first stretching part, a second stretching part and a third stretching part, and the display part has a display surface;

[0024] The first supporting portion, the first stretching portion, the second supporting portion, the second stretching portion, the third supporting portion, the third stretching portion and the fourth supporting portion are connected in sequence, and the first supporting portion is in contact with a surface of the cover structure close to the display panel, and the fourth supporting portion is in contact with a surface of the supporting structure away from the display portion;

[0025] Wherein, the second supporting portion and the third supporting portion are both in a plate shape, and the plate surface of the second supporting portion is perpendicular to the display surface, and the plate surface of the third supporting portion is parallel to the display surface.

[0026] Optionally, the buffer structure further includes a transition portion, the length of the transition portion in the first direction is the same as the length of the buffer structure in the first direction, the transition portion is located between the stretching portion and the supporting portion, and is connected to the stretching portion and the supporting portion respectively;

[0027] The elastic modulus of the transition portion is greater than the elastic modulus of the stretch portion, and the elastic modulus of the transition portion is less than the elastic modulus of the support portion.

[0028] Optionally, the transition portion comprises a second mesh structure and a second filling structure, the second mesh structure comprises a plurality of second meshes, and at least a portion of the second filling structure is located in the plurality of second meshes;

[0029] The density of the first meshes in the first mesh structure is smaller than the density of the second meshes in the second mesh structure.

[0030] According to another aspect of the present invention, a display device is provided, comprising: a middle frame and a display module, wherein the display module is the above-mentioned display module, and the display module is located inside the middle frame.

[0031] Optionally, the display device further includes a buffer pad, wherein the buffer pad is located between the buffer structure and the middle frame, and the buffer pad is connected to the middle frame.

[0032] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0033] A display module is provided, comprising: a buffer structure, a display panel and a cover plate structure. The buffer structure is located at a side of a bent portion of the display panel away from a display portion of the display panel, a first end of the buffer structure is connected to a side of the cover plate structure close to the display panel, and a second end of the buffer structure is connected to a side of the connection portion away from the display portion. Thus, by arranging the buffer structure outside the bent portion of the display panel to protect the bent portion, damage to the bent portion caused by external impact can be avoided, and the buffer structure can also play a role in dustproofing and waterproofing the bent portion of the display panel, thereby achieving the effect of optimizing the impact resistance of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 is a schematic diagram of the structure of a display device;

[0036] Figure 2 It is a structural schematic diagram of a display module provided by an embodiment of the utility model;

[0037] Figure 3 yes Figure 2 The cross-sectional structure diagram of the display module shown along the position A1-A2;

[0038] Figure 4 It is a structural schematic diagram of a display device provided by an embodiment of the utility model;

[0039] Figure 5 It is a structural schematic diagram of a buffer structure provided by an embodiment of the utility model;

[0040] Figure 6 yes Figure 5 A schematic structural diagram of a stretching portion in the buffer structure shown;

[0041] Figure 7 yes Figure 6 A schematic diagram of a cross-sectional structure of the buffer structure shown along the position B1-B2;

[0042] Figure 8 yes Figure 6 Another schematic diagram of a cross-sectional structure of the buffer structure shown along the position B1-B2;

[0043] Fig. 9 It is a structural schematic diagram of another display module provided by an embodiment of the utility model;

[0044] Fig.10 yes Fig. 9 A schematic structural diagram of a buffer structure in a display module shown;

[0045] Fig.11 yes Figure 3 A schematic structural diagram of a buffer structure in a display module shown;

[0046] Fig.12 It is a structural schematic diagram of another buffer structure provided by an embodiment of the utility model;

[0047] Fig.13 yes Fig.12 A schematic diagram of the structure of the stretching portion and the transition portion in the buffer structure shown;

[0048] Fig.14 It is a structural schematic diagram of a display device provided by an embodiment of the utility model;

[0049] Fig.15 It is a structural schematic diagram of a display device provided by an embodiment of the utility model.

[0050] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0052] A flexible display panel refers to a display panel that can be bent. For example, the flexible display panel may be a display panel including an organic light emitting diode (OLED).

[0053] Please refer to Figure 1 The display device includes a display module and a device housing. The display module includes a display panel 11 and a driver chip (not shown in the figure). The device housing includes a middle frame 12 and a screen pressing bar 13. The display panel 11 may be a flexible display panel. In the display device, a chip on plastic (COP) screen encapsulation process may be performed on the flexible display panel to increase the proportion of the display area in the display device. The COP screen encapsulation process refers to a packaging process in which a part of the flexible display panel is directly bent to realize the connection between the flexible display panel and the driver chip located on the back of the flexible display panel.

[0054] like Figure 1 As shown, the display panel 11 has a display portion 111 and a bending portion 112 and a connecting portion 113 which are connected in sequence and are located on one side of the display portion 111. The driving chip is located on the side of the display panel 11 away from the display surface p1. The display panel 11 is bent by bending the bending portion 112 to the side away from the display surface p1, so that the connecting portion 113 is electrically connected to the driving chip located on the back of the display panel 11. In this way, after the display panel 11 is bent once, the frame of the display module can be reduced, thereby realizing a narrow frame design of the display module.

[0055] However, since the bent portion 112 of the display panel 11 is relatively fragile, when the display device falls, the middle frame 12 may be deformed and squeeze the bent portion 112 of the display panel 11, causing damage to the display module.

[0056] The display device may also be a foldable display device, and the display module (MDL) is a foldable display module. During the manufacturing process of the display device, after the display module and the middle frame 12 are assembled, the display side of the display module may be encapsulated by using the screen pressing strip 13. Considering that the position of the display module may change before and after folding, there is a gap between the screen pressing strip 13 and the display module, which results in foreign matter such as dust or liquid entering the gap between the display module and the middle frame 12 through the gap during the use of the display device, and gradually accumulating in the gap between the display module and the middle frame 12. The display module also includes a cover plate structure 14. During the assembly process of the display module, the cover plate structure 14 and the display panel 11 may be bonded first, and then the display panel 11 may be bent. Therefore, there is a reserved gap between the bent portion 112 of the display panel 11 and the cover plate structure 14 to prevent the cover plate structure 14 from affecting the bending process of the display panel 11. However, foreign matter in the gap between the display module and the middle frame may also enter between the display panel 11 and the cover structure 14 through the reserved gap, causing poor display of the display panel 11 and affecting the display effect of the display panel 11 .

[0057] In addition, as the gap between the display module and the middle frame 12 accumulates, the gap between the bent portion 112 of the display panel 11 in the display module and the middle frame 12 becomes smaller. When the display device falls, the possibility of breakage of the signal (SD) line on the display panel 11 will be further increased, making it easier to damage the display module.

[0058] The embodiments of the present utility model provide a display module and a display device, which can solve the problems existing in the related art.

[0059] Please refer to Figure 2 and Figure 3The display module 20 includes: a buffer structure 21 and a stacked display panel 22 and a cover structure 23 .

[0060] The cover structure 23 may include a first area and a second area located outside the first area, and the orthographic projection of the display panel 22 on the cover structure 23 is located in the first area. That is, the cover structure 23 may extend from the display panel 22 to protect the display panel 22.

[0061] The display panel 22 may include a display portion 221, and a bending portion 222 and a connecting portion 223 extending from the edge of the display portion 221 and connected in sequence, wherein the display portion 221, the bending portion 222 and the connecting portion 223 may be an integral structure. The display portion 221 may have a display surface p1 and a back surface p2 relative to each other, and the display portion 221 may include a display area and a fan-out area (English: Fanout) located on one side of the display area, and the display area may include a plurality of display units, and the display units are used to emit light so that the display area can display images, and the surface of the display area used to display images is the display surface p1 of the display portion 221. The edge of the fan-out area may contact the edge of the bending portion 222.

[0062] Among them, the bending portion 222 and the connecting portion 223 can be located on the side of the display portion 221 away from the cover plate structure 23. That is, the bending portion 222 and the connecting portion 223 are located on the side of the back side p2 of the display portion 221 away from the display surface p1 of the display portion 221. The display panel 22 may include power lines and signal lines for transmitting voltage signals to multiple display units in the display area. The fan-out area may include multiple connecting lines, and the multiple connecting lines are electrically connected to the display units in the display area. The bending portion 222 can bend the connecting portion 223 to the side of the back side p2 of the display portion 221 away from the display surface p1. Multiple connecting lines in the fan-out area can extend to the connecting portion 223 through the bending portion 222.

[0063] Please refer to Figure 4, the buffer structure 21 may be located at a side of the bent portion 222 of the display panel 22 away from the display portion 221, the first end of the buffer structure 21 may be connected to a side of the cover structure 23 close to the display panel 22, the orthographic projection of the first end of the buffer structure 21 on the cover structure 23 is located in the second region of the cover structure 23, and the second end of the buffer structure 21 may be connected to a side of the connection portion 223 away from the display portion 221. That is, the first end of the buffer structure 21 may be located at a side of the bent portion 222 of the display panel 22 close to the first edge s1 of the cover structure 23, the cover structure 23 may have multiple edges, and the first edge s1 is an edge adjacent to the bent portion 222 of the display panel 22 among the multiple edges. The second end of the buffer structure 21 may be located at a side of the bent portion 222 of the display panel 22 close to the connection portion 223. In this way, the buffer structure 21 can be located outside the bent portion 222 of the display panel 22 to protect the bent portion 222 of the display panel 22 and the multiple connection lines on the bent portion 222. When the display device 30 falls, the deformed middle frame 40 may apply pressure to the bent portion 222 of the display panel 22. The buffer structure 21 can support the deformed middle frame 40 to buffer the pressure applied by the middle frame 40, thereby preventing the external impact force from damaging the bent portion 222 of the display panel 22, such as preventing the connection lines on the bent portion 222 from breaking.

[0064] In addition, since the first end and the second end of the buffer structure 21 are respectively connected to the cover structure 23 and the connection portion 223 of the display panel 22, foreign matter (such as dust, water vapor, etc.) in the external environment can be prevented from adhering to the bending area of ​​the display panel 22, and foreign matter can be prevented from entering the gap between the bending area of ​​the display panel 22 and the packaging cover. For example, dust can be prevented from entering the gap between the display panel 22 and the packaging cover. Figure 1 The reserved gap between the bent portion 222 of the display panel 22 and the cover structure 23 is shown to prevent the display panel 22 from displaying poorly. In this way, the buffer structure 21 can also protect the bent portion 222 of the display panel 22 from dust and water.

[0065] In summary, an embodiment of the utility model provides a display module, including: a buffer structure, a display panel and a cover plate structure. The buffer structure is located on the side of the bent portion of the display panel away from the display portion of the display panel, the first end of the buffer structure is connected to the side of the cover plate structure close to the display panel, and the second end of the buffer structure is connected to the side of the connection portion away from the display portion. In this way, by arranging the buffer structure on the outside of the bent portion of the display panel to protect the bent portion, it is possible to avoid damage to the bent portion caused by external impact force, and the buffer structure can also play a role in dustproofing and waterproofing the bent portion of the display panel, which can achieve the effect of optimizing the impact resistance of the display module.

[0066] In an optional embodiment, the buffer structure 21 may be a sheet-like structure or a plate-like structure, so that the weight of the buffer structure 21 can be reduced to achieve lightweight display module 20. Moreover, compared with the block-like buffer structure 21, the sheet-like or plate-like buffer structure 21 occupies less space, can reduce the distance between the display panel 22 and the first edge s1 of the cover structure 23, can reduce the frame of the display module 20, and can achieve a narrow frame design of the display module 20.

[0067] In an alternative implementation, please refer to Figure 5 , Figure 5 In order to facilitate the arrangement of the stretching portion 211 and the supporting portion 212 on the buffer structure 21, the buffer structure 21 is shown when it is not bent. The buffer structure 21 may include a stretching portion 211 and a supporting portion 212 connected to each other, and the length of the stretching portion 211 in the first direction d1 and the length of the supporting portion 212 in the first direction d1 are both the same as the length of the buffer structure 21 in the first direction d1, and the first direction d1 is a direction parallel to the first edge s1 of the display portion 221; wherein the elastic modulus of the stretching portion 211 is smaller than the elastic modulus of the supporting portion 212.

[0068] The elastic modulus is the proportional coefficient of stress and strain of a material in the elastic deformation stage. The elastic modulus is a physical quantity that describes the elasticity of a material. It can be regarded as an indicator of the ease with which a material can produce elastic deformation. The larger the value of the elastic modulus, the greater the stress required to produce a certain elastic deformation of the material, that is, the greater the stiffness of the material, that is, the smaller the elastic deformation that occurs under a certain stress.

[0069] In this way, the stretching portion 211 in the buffer structure 21 is easier to deform than the supporting portion 212 , which can increase the energy absorption capacity of the buffer structure 21 and enhance the buffer effect of the buffer structure 21 .

[0070] The support portion 212 is less likely to deform under force than the stretching portion 211. The support portion 212 can support the stretching portion 211 to provide sufficient support when the buffer structure 21 is subjected to external pressure, that is, when the buffer structure 21 is squeezed or pressed by external force, to prevent the buffer structure 21 from collapsing due to squeezing, thereby affecting the bent portion 222 of the display panel 22.

[0071] Exemplarily, the elastic modulus of the support portion 212 of the buffer structure 21 is greater than or equal to 1 GPa, and the elastic modulus of the tensile portion 211 of the buffer structure 21 is less than or equal to 100 MPa. Within this range, the buffer structure 21 has both sufficient elasticity and sufficient tensile strength to meet the requirement that the buffer structure 21 protects the bent portion 222 of the display panel 22, so that the display module 20 can achieve better anti-extrusion performance.

[0072] Exemplarily, the material of the support portion 212 of the buffer structure 21 may include at least one of a metal material and a polymer material. For example, the material of the support portion 212 of the buffer structure 21 may include at least one of stainless steel (abbreviated as: SUS), titanium alloy, copper alloy, polyester (English: polyethylene glycol terephthalate; abbreviated as: PET) and polyimide (English: Polyimide; abbreviated as: PI).

[0073] The thickness of the buffer structure 21 ranges from 20 μm to 80 μm, so as to form a lightweight display module 20 .

[0074] In an alternative implementation, please refer to Figure 6 It should be noted that Figure 6 In order to facilitate the illustration of the structure of the stretching portion 211, Figure 5 The direction of the stretching portion 211 in the embodiment is rotated, but the actual structure of the stretching portion 211 is not changed. The stretching portion 211 may include a first mesh structure 2111 and a first filling structure 2112, the first mesh structure 2111 includes a plurality of first meshes k1, and at least a portion of the first filling structure 2112 is located in at least a portion of the first meshes k1 among at least a portion of the first meshes k1 among the plurality of first meshes k1.

[0075] When the display device 30 is a foldable display device 30, the display module 20 is a foldable display module 20, and the relative positions of the first end and the second end of the buffer structure 21 may also change before and after the display module 20 is folded. In an exemplary embodiment, the shortest distance between the first end and the second end of the buffer structure 21 in the folded display module 20 is greater than the shortest distance between the first end and the second end of the buffer structure 21 in the display module 20 before folding. In this case, the first mesh structure 2111 can make the stretching portion 211 have elastic properties so that it can be stretched to a certain length, and can also play the role of energy absorption and buffering.

[0076] like Figure 6 As shown, the first mesh structure 2111 can be a structure formed by staggered arrangement of multiple first meshes k1 in the transverse and / or longitudinal directions. Since the multiple first meshes k1 are staggered, the area can present a spring state. Therefore, the first mesh structure 2111 has stretching and contraction properties in the transverse and / or longitudinal directions, so that the buffer structure 21 can be deformed and the buffer structure 21 is convenient to bend.

[0077] In an exemplary embodiment, a portion of the multiple first meshes k1 may be hollow holes formed by penetrating the first mesh structure 2111 in the thickness direction, and a portion of the holes may be blind holes formed by not penetrating the first mesh structure 2111 in the thickness direction. The shapes of the holes include circular holes, rounded rectangular holes, etc., and no specific restrictions are made here.

[0078] The first filling structure 2112 can be used to fill at least a portion of the first meshes k1 among the plurality of meshes, and at least a portion of the first meshes k1 can be hollow holes to ensure the dustproof and waterproof performance of the buffer structure 21 .

[0079] In an alternative implementation, please refer to Figure 7 The first filling structure 2112 may include a plurality of first filling parts t1, and the plurality of first filling parts t1 correspond to the plurality of first meshes k1 one by one, and each first filling part t1 is located in the corresponding first mesh k1. The plurality of first meshes k1 may all be hollow holes, so that the force on the stretching part 211 is uniform. The material of the first filling part t1 may include silicone, and the first filling material may be printed in each first mesh k1 using an inkjet process to form the first filling structure 2112, so as to prevent foreign matter in the external environment from entering between the buffer structure 21 and the bending part 222 of the display panel 22 from the first mesh structure 2111.

[0080] In an alternative implementation, please refer to Figure 8 The first filling structure 2112 may further include a first filling layer t2. The first filling layer t2 may cover one surface of the first mesh structure 2111 and be connected to the plurality of first filling portions t1.

[0081] A hot pressing process can be used to extrude the first filling material layer coated on the surface of the first mesh structure 2111 into each first mesh k1 to form a first filling structure 2112, so that a layer of the first filling material will remain on the surface of the first mesh structure 2111 to form a first filling layer t2.

[0082] The elastic modulus of the first filling structure 2112 is smaller than that of the support portion 212 , which can prevent the first filling layer t2 from affecting the elastic modulus of the stretching portion 211 . Exemplarily, the elastic modulus of the first filling layer t2 is smaller than or equal to 100 MPa.

[0083] In an alternative implementation, please refer to Fig. 9 and Fig.10The buffer structure 21 includes at least one stretching portion 211 and at least two supporting portions 212, and one stretching portion 211 is located between two adjacent supporting portions 212. The stretching portion 211 can be located between two adjacent supporting portions 212 to reduce the bending difficulty of the buffer structure 21, so as to facilitate the first end and the second end of the buffer structure 21 to be connected to the cover structure 23 and the connecting portion 223 of the display panel 22 respectively.

[0084] In an alternative implementation, please refer to Figure 3 and Figure 5 The buffer structure 21 includes a plurality of stretching parts 211 and a plurality of supporting parts 212, and the plurality of stretching parts 211 and the plurality of supporting parts 212 are arranged alternately. In this way, the deformation capacity of the buffer structure 21 can be improved, and the size of the stretching part 211 can be prevented from being too large, which would result in a decrease in the strength of the buffer structure 21.

[0085] In an optional embodiment, the ratio of the area of ​​the stretching portion 211 to the area of ​​the buffer structure 21 is in the range of 10% to 60%. Within this range, the buffer structure 21 can be prevented from being difficult to bend, and the buffer structure 21 can be prevented from having a low strength. It should be noted that the area refers to the planar area of ​​the stretching portion 211 and the planar area of ​​the buffer structure 21 when the buffer structure 21 is not bent.

[0086] In an alternative implementation, please refer to Figure 3 The display module 20 may further include a stress protection layer 24 . The stress protection layer 24 may be located on a surface of the bending portion 222 away from the display portion 221 . The display portion 221 of the display panel 22 has a display surface p1 .

[0087] The bending portion 222 has relative concave and convex surfaces. When the stress protection layer 24 is located on the convex surface of the bending portion 222, the connecting line on the bending portion 222 can be located in the middle layer during the bending process of the bending portion 222 (the middle layer is subjected to less tensile or compressive force during the bending process), thereby reducing the risk of breaking the connecting line on the bending portion 222.

[0088] The thickness of the stress protection layer 24 may be 0.03 mm to 0.12 mm. The material of the stress protection layer 24 may include curing glue, and for example, the stress protection layer 24 may be ultraviolet curing protective glue (English: Micro coating layer; MCL glue for short), or polyester polyurethane glue.

[0089] The shortest distance L1 between the buffer structure 21 and the stress protection layer 24 in a direction parallel to the display surface p1 is less than or equal to 0.3 mm, and the shortest distance L2 between the buffer structure 21 and the stress protection layer 24 in a direction perpendicular to the display surface p1 is less than or equal to 0.2 mm.

[0090] Since there is a buffer structure 21 between the stress protection layer 24 and the middle frame 40, the buffer structure 21 can absorb the energy at the middle frame 40 during the drop of the display device 30, thereby avoiding the problem that the middle frame 40 is deformed and squeezed to the stress protection layer 24 during the drop. Since the buffer structure 21 can absorb the energy conducted by the middle frame 40, the distance between the stress protection layer 24 and the middle frame 40 can be reduced, and the width of the lower frame of the display module 20 can be further reduced to increase the proportion of the display area.

[0091] In an alternative implementation, please refer to Figure 3 and Fig.11 The plurality of support portions 212 may include a first support portion 2121, a second support portion 2122, a third support portion 2123 and a fourth support portion 2124, the plurality of stretch portions 211 include a first stretch portion 2113, a second stretch portion 2114 and a third stretch portion 2115, and the display portion 221 has a display surface p1.

[0092] The first supporting portion 2121, the first stretching portion 2113, the second supporting portion 2122, the second stretching portion 2114, the third supporting portion 2123, the third stretching portion 2115 and the fourth supporting portion 2124 are connected in sequence, and the first supporting portion 2121 is in contact with a side of the cover structure 23 close to the display panel 22, and the fourth supporting portion 2124 is in contact with a side of the connecting portion 223 of the display panel 22 away from the display portion 221.

[0093] The second support portion 2122 and the third support portion 2123 are both plate-shaped, and the plate surface of the second support portion 2122 is perpendicular to the display surface p1 of the display portion 221 , and the plate surface of the third support portion 2123 is parallel to the display surface p1 of the display portion 221 .

[0094] In this way, the second support portion 2122 can protect the bent portion 222 of the display panel 22 in a direction parallel to the display surface p1 of the display portion 221, and the third support portion 2123 can protect the bent portion 222 of the display panel 22 in a direction perpendicular to the display surface p1 of the display portion 221. In addition, the first stretching portion 2113, the second stretching portion 2114 and the third stretching portion 2115 are all located in the bending area of ​​the buffer structure 21, which can reduce the bending difficulty of the buffer structure 21, thereby reducing the manufacturing difficulty of the buffer structure 21.

[0095] Please refer to Fig.12 and Fig.13 , Fig.12In order to facilitate the arrangement of the tensile portion 211 and the support portion 212 on the buffer structure 21, the buffer structure 21 is shown when it is not bent. The buffer structure 21 may also include a transition portion 213, the length of the transition portion 213 in the first direction d1 is the same as the length of the buffer structure 21 in the first direction d1, the transition portion 213 is located between the tensile portion 211 and the support portion 212, and is connected to the tensile portion 211 and the support portion 212 respectively; the elastic modulus of the transition portion 213 is greater than the elastic modulus of the tensile portion 211, and the elastic modulus of the transition portion 213 is less than the elastic modulus of the support portion 212. The transition portion 213 is located between the tensile portion 211 and the support portion 212, and a force transition zone can be formed. In this way, when the buffer structure 21 is bent, the force between the tensile portion 211 and the support portion 212 can change gradually to avoid stress concentration.

[0096] like Fig.13 As shown, in an optional embodiment, the transition portion 213 may include a second mesh structure 2131 and a second filling structure 2132, the second mesh structure 2131 includes a plurality of second meshes k2, and at least part of the second filling structure 2132 is located in the plurality of second meshes k2; the density of the first meshes k1 in the first mesh structure 2111 is less than the density of the second meshes k2 in the second mesh structure 2131. Wherein, the second mesh structure 2131 may be a structure formed by staggered arrangement of a plurality of hollowed-out second meshes k2 in the transverse and / or longitudinal directions, and the size of the second meshes k2 may be determined according to the size of the actual position. Exemplarily, the shape of the second mesh k2 may be circular, and the second mesh structure 2131 may be a structure formed by a plurality of hollowed-out circular holes arranged in parallel in the transverse direction. Alternatively, the second mesh structure 2131 may be a structure formed by staggered arrangement of a plurality of hollowed-out circular holes in the transverse and longitudinal directions. Alternatively, the shape of the second mesh k2 may be a rounded rectangle, and the second mesh structure 2131 is a structure formed by a plurality of hollowed-out rounded rectangular holes staggered in the transverse and longitudinal directions.

[0097] The smaller the density of the meshes in the mesh structure (the first mesh structure 2111 or the second mesh structure 2131 ), the larger the elastic modulus. That is, the density of the meshes is negatively correlated with the elastic modulus.

[0098] In an exemplary embodiment, please refer to Fig. 9The cover plate structure 23 may include a first adhesive layer 231, a first transparent cover plate 232, a second adhesive layer 233, and a second transparent cover plate 234 stacked in a direction away from the display panel 22. The materials of the first adhesive layer 231 and the second adhesive layer 233 may include an optically clear adhesive (OCA), and the materials of the first cover plate 232 and the second cover plate 234 may include at least one of polyethylene glycol terephthalate (PET) and ultra-thin glass (UTG).

[0099] The display module 20 may further include a support structure 25 located on the back side of the display panel 22. The support structure 25 may include a first buffer layer 251, a third adhesive layer 252, a support layer 253 (English: Bracket), a fourth adhesive layer 254, and a second buffer layer 255 stacked along the display portion 221 away from the display panel 22. The material of the support layer 253 may be metal (such as stainless steel), or the support layer 253 may also be a carbon fiber reinforced polymer composite material (abbreviated: CFRP). The material of the third adhesive layer 252 and the fourth adhesive layer 254 may include a pressure sensitive adhesive (English: Pressure Sensitive Adhesive; abbreviated: PSA).

[0100] In summary, an embodiment of the utility model provides a display module, including: a buffer structure, a display panel and a cover plate structure. The buffer structure is located on the side of the bent portion of the display panel away from the display portion of the display panel, the first end of the buffer structure is connected to the side of the cover plate structure close to the display panel, and the second end of the buffer structure is connected to the side of the connection portion away from the display portion. In this way, by arranging the buffer structure on the outside of the bent portion of the display panel to protect the bent portion, it is possible to avoid damage to the bent portion caused by external impact force, and the buffer structure can also play a role in dustproofing and waterproofing the bent portion of the display panel, which can achieve the effect of optimizing the impact resistance of the display module.

[0101] Please refer to Fig.14 The display device 30 may include: a middle frame 40 and a display module, the display module is the display module in any of the above embodiments, and the display module is located inside the middle frame 40. The display device 30 also includes a screen pressing bar 50 connected to one end of the middle frame 40.

[0102] The display device 30 may include an integral adhesive strip 301 stacked along a direction close to the screen pressure strip 50, a frame adhesive 302, a supporting back plate 303 (English: bracket; abbreviated: BKT), a display panel 22 (English: panel; abbreviated: PNL), a first optically transparent adhesive 304 (OCA1), an ultra-thin glass 305 (UTG), a second optically transparent adhesive 306 (OCA2), a colorless transparent polyimide 307 (CPI) and ink 308 (English: ink).

[0103] Please refer to Fig.15 In an optional embodiment, the display device 30 may further include a buffer pad 26, which is located between the buffer structure 21 and the middle frame 40, and the buffer pad 26 is connected to the middle frame 40. The buffer pad 26 may include a rubber material or foam. The buffer pad may be used to absorb the energy generated when the middle frame 40 is deformed to prevent the middle frame 40 from squeezing the buffer structure 21, and may further protect the bent portion 222 of the display panel 22.

[0104] In summary, an embodiment of the utility model provides a display device, including a display module, wherein the display module includes: a buffer structure, a display panel and a cover structure. The buffer structure is located on the side of the bent portion of the display panel away from the display portion of the display panel, the first end of the buffer structure is connected to the side of the cover structure close to the display panel, and the second end of the buffer structure is connected to the side of the connection portion away from the display portion. In this way, by arranging the buffer structure on the outside of the bent portion of the display panel to protect the bent portion, it is possible to avoid damage to the bent portion caused by external impact force, and the buffer structure can also play a role in dustproofing and waterproofing the bent portion of the display panel, which can achieve the effect of optimizing the impact resistance of the display module.

[0105] The term "at least one of A and B" in the present invention is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, at least one of A and B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0106] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0107] In the present invention, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise clearly defined.

[0108] The above description is only an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A display module, characterized in that: The display module comprises: a buffer structure and a stacked display panel and cover plate structure; The cover plate structure comprises a first area and a second area located outside the first area, and the orthographic projection of the display panel on the cover plate structure is located in the first area; The display panel comprises a display portion, and a bending portion and a connecting portion extending from an edge of the display portion and connected in sequence, wherein the bending portion and the connecting portion are located on a side of the display portion away from the cover plate structure; The buffer structure is located on a side of the bending portion away from the display portion, the first end of the buffer structure is connected to a side of the cover structure close to the display panel, the orthographic projection of the first end of the buffer structure on the cover structure is located in the second area, and the second end of the buffer structure is connected to a side of the connecting portion away from the display portion.

2. The display module according to claim 1, characterized in that: The buffer structure comprises a stretching portion and a supporting portion connected to each other, the length of the stretching portion in a first direction and the length of the supporting portion in the first direction are both the same as the length of the buffer structure in the first direction, and the first direction is a direction parallel to the first edge of the display portion; The elastic modulus of the stretching portion is smaller than the elastic modulus of the supporting portion.

3. The display module according to claim 2, characterized in that: The stretching portion includes a first mesh structure and a first filling structure, the first mesh structure includes a plurality of first meshes, and at least a portion of the first filling structure is located in at least a portion of the first meshes among the plurality of first meshes.

4. The display module according to claim 3, characterized in that: The first filling structure includes a plurality of first filling parts, the plurality of first filling parts correspond to the plurality of first meshes one by one, and each of the first filling parts is located in a corresponding first mesh.

5. The display module according to claim 4, characterized in that: The first filling structure further includes a first filling layer, which covers one side of the first mesh structure and is connected to the plurality of first filling parts; The elastic modulus of the first filling structure is smaller than the elastic modulus of the support portion.

6. The display module according to claim 2, characterized in that: The buffer structure includes at least one stretching portion and at least two supporting portions, and one stretching portion is located between two adjacent supporting portions.

7. The display module according to claim 2, characterized in that: The buffer structure includes a plurality of the stretching portions and a plurality of the supporting portions, and the plurality of the stretching portions and the plurality of the supporting portions are arranged alternately.

8. The display module according to claim 2, characterized in that: The ratio of the area of ​​the stretching portion to the area of ​​the buffer structure is in a range of 10% to 60%.

9. The display module according to claim 2, characterized in that: The elastic modulus of the support portion is greater than or equal to 1 GPa, and the elastic modulus of the stretching portion is less than or equal to 100 MPa; The thickness of the buffer structure ranges from 20 microns to 80 microns.

10. The display module according to claim 1, characterized in that: The display module further comprises a stress protection layer, wherein the stress protection layer is located on a side of the bending portion away from the display portion, and the display portion has a display surface; The shortest distance between the buffer structure and the stress protection layer in a direction parallel to the display surface is less than or equal to 0.3 mm, and the shortest distance between the buffer structure and the stress protection layer in a direction perpendicular to the display surface is less than or equal to 0.2 mm.

11. The display module according to claim 7, characterized in that: The plurality of support parts include a first support part, a second support part, a third support part and a fourth support part, the plurality of stretching parts include a first stretching part, a second stretching part and a third stretching part, and the display part has a display surface; The first supporting portion, the first stretching portion, the second supporting portion, the second stretching portion, the third supporting portion, the third stretching portion and the fourth supporting portion are connected in sequence, and the first supporting portion is in contact with a surface of the cover structure close to the display panel, and the fourth supporting portion is in contact with a surface of the connecting portion away from the display portion; Wherein, the second supporting portion and the third supporting portion are both in a plate shape, and the plate surface of the second supporting portion is perpendicular to the display surface, and the plate surface of the third supporting portion is parallel to the display surface.

12. The display module according to claim 3, characterized in that: The buffer structure further includes a transition portion, the length of the transition portion in the first direction is the same as the length of the buffer structure in the first direction, the transition portion is located between the stretching portion and the supporting portion, and is connected to the stretching portion and the supporting portion respectively; The elastic modulus of the transition portion is greater than the elastic modulus of the stretch portion, and the elastic modulus of the transition portion is less than the elastic modulus of the support portion.

13. The display module according to claim 12, characterized in that: The transition portion includes a second mesh structure and a second filling structure, the second mesh structure includes a plurality of second meshes, and at least a portion of the second filling structure is located in the plurality of second meshes; The density of the first meshes in the first mesh structure is smaller than the density of the second meshes in the second mesh structure.

14. A display device, characterized in that: The display device comprises: a middle frame and a display module, the display module is the display module according to any one of claims 1 to 13, and the display module is located on the inner side of the middle frame.

15. The display device according to claim 14, characterized in that: The display device further includes a buffer pad, which is located between the buffer structure and the middle frame, and is connected to the middle frame.

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