Display module and display device

Abstract

The invention provides a display module and a display device. The problem that in the prior art, a bending area of a flexible display product is poor in impact resistance is solved. The display module is provided with a first area, a bending area and a second area which are sequentially connected in the first direction. The display module comprises a flexible display screen; the first supporting layer is located on the non-display side of the flexible display screen; the second supporting layer is located on the side, away from the flexible display screen, of the first supporting layer, the second supporting layer is provided with a first patterned structure, and the first patterned structure is located in the bending area; the first adhesive layer is located between the first supporting layer and the second supporting layer, the first adhesive layer is provided with a fracture, and the fracture is located in the bending area; and the first elastic layer is positioned in the fracture.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display module and a display device. Background Technology

[0002] With the development of flexible display technology, flexible displays are increasingly being used in terminal devices. In these devices, flexible displays are typically combined with a supporting structure, using the support structure to enable the folding and unfolding of the flexible display, thus forming a foldable flexible display. Compared to traditional flexible displays, flexible displays have several advantages, such as being lightweight and thin, having low power consumption, being bendable, and being flexible, leading to a wider range of applications.

[0003] However, in related technologies, the bending area of ​​flexible display products is prone to screen failure due to stress on the back, resulting in low reliability. Summary of the Invention

[0004] In view of this, embodiments of this application provide a display module and a display device, which solve the problem of poor impact resistance in the bending area of ​​flexible display products in the prior art.

[0005] The first aspect of this application provides a display module having a first region, a bending region, and a second region sequentially connected along a first direction; the display module includes: a flexible display screen; a first support layer located on the non-display side of the flexible display screen; a second support layer located on the side of the first support layer opposite to the flexible display screen, the second support layer having a first patterned structure located in the bending region; a first adhesive layer located between the first support layer and the second support layer, the first adhesive layer having a fracture located in the bending region; and a first elastic layer located within the fracture.

[0006] In conjunction with the first aspect, in some possible implementations, the modulus of the first support layer is greater than or equal to 10 GPa; preferably, the first support layer comprises any one of ultra-thin glass and stainless steel sheet; and / or, the material of the second support layer comprises at least one of ultra-thin steel sheet, metal, titanium fiber, and titanium alloy; preferably. In conjunction with the first aspect, in some possible implementations, in a second direction perpendicular to the flexible display screen, the thickness of the first elastic layer is less than or equal to the thickness of the first adhesive layer; preferably, the elasticity of the first elastic layer is greater than or equal to that of the first adhesive layer; preferably, the first elastic layer and the first support layer are in contact; or, there is a gap between the first elastic layer and the first support layer; preferably, the first elastic layer and the first adhesive layer are in contact; or, there is a gap between the first elastic layer and the first adhesive layer; preferably, the first adhesive layer comprises optically transparent adhesive; preferably, the first elastic layer and the second support layer are fixedly connected; preferably, the modulus of the first elastic layer is greater than or equal to 0.1 MPa and less than or equal to 100 MPa; preferably, the material of the first elastic layer comprises thermoplastic polyurethane elastomer; preferably, the orthographic projection of the fracture on the flexible display screen and the orthographic projection of the first patterned structure on the flexible display screen overlap.

[0007] In conjunction with the first aspect, in some possible implementations, the display module further includes a second adhesive layer, which is located between the first elastic layer, the second support layer, and the filler portion; preferably, the orthographic projection of the first elastic layer on the flexible display screen is located within the orthographic projection range of the first patterned structure on the flexible display screen; preferably, the material of the second adhesive layer includes any one of optically transparent adhesive and easy-pull adhesive.

[0008] In conjunction with the first aspect, in some possible implementations, the first patterned structure includes a first cutout structure, and the orthographic projection of the first elastic layer on the flexible display screen and the orthographic projection of the first cutout structure on the flexible display screen at least partially overlap.

[0009] In conjunction with the first aspect, in some possible implementations, the display module further includes a filling portion that fills the first hollow structure, and the elasticity of the filling portion is greater than that of the second support layer; preferably, the first hollow structure includes a strip-shaped hole penetrating the second support layer along the thickness direction of the second support layer, and the filling portion fills the strip-shaped hole; preferably, the modulus of the filling portion is greater than or equal to 0.1 MPa and less than or equal to 100 MPa; preferably, the material of the filling portion includes thermoplastic polyurethane elastomer; preferably, the materials of the filling portion and the first elastic layer are the same or different.

[0010] In conjunction with the first aspect, in some possible implementations, the first elastic layer and the filling portion are connected, and the first elastic layer and the filling portion are made of the same material; preferably, the orthographic projection of the first hollow structure on the flexible display screen is located within the orthographic projection range of the first elastic layer on the flexible display screen; preferably, the display module further includes a second elastic layer, the second elastic layer is located on the side of the filling portion opposite to the first elastic layer, the second elastic layer and the filling portion are connected, and the second elastic layer and the filling portion are made of the same material; preferably, the orthographic projection of the first elastic layer on the flexible display screen is located within the orthographic projection range of the second elastic layer on the flexible display screen; preferably, the second support layer includes a groove, the opening of the groove is located on the side of the second support layer opposite to the flexible display screen, the second elastic layer is located in the groove, and the surface of the second elastic layer opposite to the flexible display screen and the surface of the second support layer opposite to the flexible display screen are flush; preferably, the groove communicates with the first hollow structure, and the orthographic projection of the groove on the flexible display screen covers the orthographic projection of the first hollow structure on the flexible display screen.

[0011] In conjunction with the first aspect, in some possible implementations, the first support layer has a second patterned result, and the second patterned structure is located in the bending area; preferably, the first patterned structure has a first hollow structure, the second patterned structure has a second hollow structure, and the orthographic projection of the first hollow structure on the flexible display screen and the orthographic projection of the second hollow structure on the flexible display screen do not overlap.

[0012] In conjunction with the first aspect, in some possible implementations, the display module further includes a support protective film located between the first support layer and the flexible display screen; preferably, the display module further includes a polarizer, a third adhesive layer, and a first cover plate sequentially stacked on the side of the flexible display screen opposite to the first support layer; preferably, the display module further includes a fourth adhesive layer and a second cover plate sequentially stacked on the side of the first cover plate opposite to the flexible display screen.

[0013] A second aspect of this application provides a display device, including the display module provided in any embodiment of this application.

[0014] According to the display module and display device provided in the embodiments of this application, by setting a first support layer and a second support layer stacked together, the first support layer and the second support layer constitute a double support layer structure, which improves the rigidity of the bending area and thus improves the impact resistance of the back of the display module. At the same time, by opening a notch in the first adhesive layer between the first support layer and the second support layer, and filling the notch with a first elastic layer, the notch ensures that the first support layer and the second support layer are separated from each other in the bending area, avoiding stress transmission from the second support layer to the first support layer, reducing the mutual influence between the two, and increasing the stress release capacity of the bending area through the first elastic layer, thereby further improving the impact resistance of the back of the display module and improving reliability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the corrosion structure of a display module provided in an embodiment of this application.

[0016] Figure 2 for Figure 1 The diagram shown is a partial schematic of the first cross-sectional structure of the module along line AA.

[0017] Figure 3 for Figure 2 The diagram shown is a partial top view of the second support layer in the display module.

[0018] Figure 4 for Figure 1 The diagram shows a partial schematic of the second cross-sectional structure of the module along line AA.

[0019] Figure 5 for Figure 1 The diagram shown is a partial schematic of the third cross-sectional structure of the module along line AA.

[0020] Figure 6 for Figure 1 The diagram shown is a partial schematic of the fourth cross-sectional structure of the module along line AA.

[0021] Figure 7 for Figure 1 The diagram shown is a partial schematic of the fifth cross-sectional structure of the module along line AA.

[0022] Figure 8 for Figure 1 The diagram shown is a partial schematic of the sixth cross-sectional structure of the module along line AA.

[0023] Figure 9 for Figure 1 The diagram shown is a partial schematic of the seventh cross-sectional structure of the module along line AA.

[0024] Figure 10 for Figure 1 The diagram shown is a partial schematic of the eighth cross-sectional structure of the module along line AA.

[0025] Figure 11 for Figure 1 The diagram shown is a partial schematic of the ninth cross-sectional structure of the module along line AA.

[0026] Figure 12 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0027] As mentioned in the background section, the bending area of ​​flexible displays is prone to failure due to stress on the back. The inventors discovered that this problem arises because, in related technologies, to improve the bending performance of flexible displays, the support structure on the back of the display is patterned, for example, by creating a perforated pattern on the support structure. In a drop ball experiment, when a ball hits the support structure on the back of the flexible display, if the ball hits the perforated pattern in the bending area, the local deformation of the support structure worsens, resulting in significantly greater local stress and easier stress concentration. This can cause the flexible display to arch, and in severe cases, even damage the flexible display, leading to problems such as colored spots or black spots.

[0028] In view of this, the embodiments of this application have improved the support structure, thereby increasing the stiffness of the support structure while ensuring the bending performance of the support structure as much as possible, thereby reducing the degree of damage caused by the force on the back side, improving the impact resistance of the back side, and improving the reliability of the product.

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the accompanying drawings, the dimensions of layers and regions may be exaggerated for clarity. It is understood that when a structure is referred to as being "on" or "below" another structure, the structure may be directly on or below the other structure, or there may be intermediate structures. The same reference numerals always indicate the same structure. Structures referred to herein include any of the following: membrane, element, device, component, assembly.

[0031] When a structure is referred to as being “connected” to another structure, it can be directly connected to the other structure or indirectly connected to the other structure by means of one or more intermediate structures placed between them.

[0032] In this specification, "electrical connection" includes the situation where components are connected together by elements that have a certain electrical function. There are no particular limitations on what constitutes an "electrical function," as long as it allows for the transmission and reception of electrical signals between the connected components. Examples of "electrical functions" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements with various functions.

[0033] Figure 1 This is a top view of a display module provided in an embodiment of this application. Figure 2 for Figure 1The diagram shows a partial schematic of the first cross-sectional structure of the module along line AA. (Combined with...) Figure 1 and Figure 2 As shown, the display module has a first area PA1, a bending area SA, and a second area PA2 connected sequentially along a first direction x. For example, the display module is rectangular, and along the long side of the rectangle, the display module is divided into three areas: the first area PA1, the bending area SA, and the second area PA2.

[0034] The bending zone SA can switch between an unfolded state and a bent state. When the bending zone SA is in the unfolded state, the first zone PA1, the bending zone SA, and the second zone PA2 are coplanar. When the bending zone SA is in the bent state, the first zone PA1 and the second zone PA2 are superimposed, and the first zone PA1 and the second zone PA2 are in contact with each other or have a certain gap.

[0035] The areas of the first zone PA1 and the second zone PA2 may be equal or unequal. For example, when the areas of the first zone PA1 and the second zone PA2 are equal, the functions of the first zone PA1 and the second zone PA2 are the same. When the bending zone SA is in a bent state, either the first zone PA1 or the second zone PA2 can be used as the main screen via software control, while the other is in a dormant state. When the bending zone SA is in an unfolded state, the first zone PA1, the bending zone SA, and the second zone PA2 combine to form a complete flexible display screen, jointly realizing the display function. For example, when the areas of the first zone PA1 and the second zone PA2 are unequal, for example, the area of ​​the first zone PA1 is larger than that of the second zone PA2, the first zone PA1 is used as the main screen by default, and the second zone PA2 is used as the secondary screen. When the bending zone SA is in a bent state, the first zone PA1 is used to display a user-selected image or video, and the second zone PA2 is used to display a preset dynamic or static image, such as a clock image. When the bending zone SA is in an unfolded state, the first zone PA1, the bending zone SA, and the second zone PA2 combine to form a complete flexible display screen, jointly realizing the display function.

[0036] The display module includes a flexible display screen 10, a first support layer 21, a second support layer 22, a first adhesive layer 23, and a first elastic layer 24. The first support layer 21 is located on the non-display side of the flexible display screen 10. The second support layer 22 is located on the side of the first support layer 21 facing away from the flexible display screen 10, and the second support layer 22 has a first patterned structure Q1 located in the bending region SA. The first adhesive layer 23 is located between the first support layer 21 and the second support layer 22, and the first adhesive layer 23 has a fracture K located in the bending region SA. The first elastic layer 24 is located within the fracture K.

[0037] The flexible display screen 10 can be any one of an organic light-emitting diode (OLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a micro light-emitting diode (Micro LED) display screen, or electronic paper (E-paper).

[0038] In one embodiment, the modulus of the first support layer 21 is greater than or equal to 10 GPa. For example, the modulus of the first support layer 21 is 10 GPa, 13 GPa, 15 GPa, 18 GPa, etc. For instance, the first support layer 21 may comprise any one of ultrathin glass or stainless steel sheet.

[0039] In one embodiment, the modulus of the second support layer 22 is greater than or equal to 10 GPa. For example, the modulus of the second support layer 22 is 10 GPa, 13 GPa, 15 GPa, 18 GPa, etc. The material of the second support layer 22 includes at least one of ultra-thin steel sheet, metal, titanium fiber, and titanium alloy. In one embodiment, the materials of the second support layer 22 and the first support layer 21 are different.

[0040] The second support layer 22 and the first support layer 21 are bonded and fixed together by a first adhesive layer 23. For example, the first adhesive layer 23 can be optically clear adhesive (OCA). The first adhesive layer 23 breaks at the bending region SA, forming a fracture K. That is, the first adhesive layer 23 comprises two parts, one part located in the first region PA1 and the other part located in the second region PA2. The advantage of this is that at the bending region SA, the second support layer 22 and the first support layer 21 are separated from each other. When the back side of the bending region SA is subjected to external force, the second support layer 22, after being deformed by the external force, will not cause tension on the first support layer 21, reducing the adverse effects of stress on the first support layer 21. In this embodiment, the cross-sectional shape of the fracture K includes either a rectangle or a trapezoid. The orthographic projection of the fracture K on the flexible display screen 10 overlaps with the orthographic projection of the first patterned structure Q1 on the flexible display screen 10. For example, the orthographic projection of the fracture K on the flexible display screen 10 is located within the orthographic projection range of the first patterned structure Q1 on the flexible display screen 10.

[0041] A first elastic layer 24 is disposed within the fracture surface K of the first adhesive layer 23. The elasticity of the first elastic layer 24 is greater than or equal to that of the first adhesive layer 23. The modulus of the first elastic layer 24 is greater than or equal to 0.1 MPa and less than or equal to 100 MPa. For example, the modulus of the first elastic layer 24 is 1 MPa, 10 MPa, 22 MPa, 24 MPa, 26 MPa, etc. For example, the material of the first elastic layer 24 is thermoplastic polyurethane elastomer. By providing the first elastic layer 24 within the fracture surface K, the first elastic layer 24 can be used to fill the fracture surface K. On the one hand, it avoids the formation of bonding air bubbles at the fracture surface K; on the other hand, it avoids direct contact between the second support layer 22 and the first support layer 21, preventing collisions.

[0042] In this embodiment, in the second direction y perpendicular to the flexible display screen 10, the thickness d of the first elastic layer 24 is less than or equal to the thickness D of the first adhesive layer 23. For example, the thickness d of the first elastic layer 24 is less than the thickness D of the first adhesive layer 23, and there is a gap between the first elastic layer 24 and the first support layer 21. Alternatively, the thickness d of the first elastic layer 24 is equal to the thickness D of the first adhesive layer 23, and the first elastic layer 24 and the first support layer 21 are in contact, but the first elastic layer 24 and the first support layer 21 are not fixedly connected; relative movement can occur between the first elastic layer 24 and the first support layer 21 under the action of external force. In the first direction x, the two sides of the first elastic layer 24 and the first adhesive layer 23 can be in contact or have a certain gap.

[0043] The first elastic layer 24 and the second support layer 22 are fixedly connected. For example, the first elastic layer 24 and the second support layer 22 are bonded together. Specifically, the display module further includes a second adhesive layer 25, which is located between the first elastic layer 24 and the second support layer 22, and the first elastic layer 24 and the second support layer 22 are bonded together by the second adhesive layer 25. For example, the second adhesive layer 25 can be optically clear adhesive (OCA), easy-pull adhesive, etc.

[0044] The second support layer 22 has a first patterned structure Q1 at the position corresponding to the bending area SA. The first patterned structure Q1 can be a thinning pattern, a hollow pattern, or a combination of a thinning pattern and a hollow pattern.

[0045] The thinning pattern includes, for example, grooves. The opening of the groove can be located on the side of the second support layer 22 facing the first support layer 21, or it can be located on the side of the second support layer 22 away from the first support layer 21. Alternatively, some of the groove openings can be located on the side of the second support layer 22 facing the first support layer 21, and other groove openings can be located on the side of the second support layer 22 away from the first support layer 21.

[0046] With some grooves having openings on the side of the second support layer 22 facing the first support layer 21, and others having openings on the side of the second support layer 22 away from the first support layer 21, the orthographic projections of the grooves with openings on different sides of the second support layer 22 onto the flexible display screen 10 do not overlap. This ensures the rigidity requirements of the second support layer 22.

[0047] The perforated pattern may include, for example, through holes that penetrate the second support layer 22 along its thickness direction. The shapes of the through holes may include circular, strip-shaped, square, etc.

[0048] Figure 3 for Figure 2 The diagram shown is a partial top view of the second support layer in the display module. Figure 3 The first patterned structure Q1 of the second support layer 22 is illustrated. Combined with... Figure 2 and Figure 3 As shown, in this embodiment, the patterned structure Q1 includes a first hollow structure, and the orthographic projection of the first elastic layer 24 on the flexible display screen 10 and the orthographic projection of the first hollow structure on the flexible display screen 10 at least partially overlap. For example, in this embodiment, the orthographic projection of the first elastic layer 24 on the flexible display screen 10 is located within the orthographic projection range of the first hollow structure on the flexible display screen 10.

[0049] In one embodiment, such as Figure 3 As shown, the first perforated structure includes multiple strip-shaped holes that penetrate the second support layer 22 along its thickness direction. The strip-shaped holes extend along a third direction z, which is perpendicular to the first direction x and the second direction y. These multiple strip-shaped holes can be divided into multiple strip-shaped hole groups. Multiple strip-shaped holes in a group are arranged sequentially along the third direction z, and multiple strip-shaped hole groups are arranged sequentially along the first direction x. In the first direction x, the strip-shaped holes in adjacent strip-shaped hole groups are staggered. That is, for adjacent strip-shaped holes in the same group, the interval between them has a central axis. For ease of description, a strip-shaped hole group adjacent to the same group is called an adjacent strip-shaped hole group, and the central axis necessarily penetrates one of the strip-shaped holes in the adjacent strip-shaped hole group.

[0050] For example, multiple strip hole groups include a first strip hole group Z1, a second strip hole group Z2, and a third strip hole group Z3 arranged sequentially along a third direction z. The first strip hole group Z1 and the third strip hole group Z3 are referred to as adjacent strip hole groups of the second strip hole group Z2. The spacing region between adjacent strip holes in the second strip hole group Z2 has a central axis L, which passes through one strip hole in the first strip hole group Z1 and one strip hole in the third strip hole group Z3.

[0051] In one embodiment, the plurality of slots includes a plurality of peripheral slots WH and a plurality of internal slots NH, wherein the peripheral slots WH are located on the periphery of the plurality of internal slots NH in the third direction z. In other words, the outermost slot in the third direction Z among the plurality of slots is called the peripheral slot WH, and the slots other than the peripheral slots WH are called the internal slots NH. The plurality of peripheral slots WH includes a first peripheral slot WH1 and a second peripheral slot WH2. One end of the first peripheral slot WH1 is open, that is, the first peripheral slot WH1 penetrates the sidewall of the second support layer 22. The second peripheral slot WH2 has an annular sidewall, and the second peripheral slot WH2 has the same structure as the internal slots NH. In the third direction Z, the first peripheral slot WH1 and the second peripheral slot WH2 are arranged alternately.

[0052] See Figure 2 The assembly process of the display module may include: First, attaching the first support layer 21 to the non-display surface of the flexible display screen 10. Second, attaching the first elastic layer 24 to one side surface of the second support layer 22 at the position corresponding to the first patterned structure Q1, and attaching the first adhesive layer 23 at the positions corresponding to the first region PA1 and the second region PA2. The attachment order of the first elastic layer 24 and the first adhesive layer 23 can be interchanged. When attaching the first adhesive layer 23, it can be divided into two parts: one part is attached to the first side of the first elastic layer 24 in the first direction x, and the other part is attached to the second side of the first elastic layer 24 in the first direction x. Next, attaching the side of the first elastic layer 24 and the first adhesive layer 23 away from the second support layer 22 to the surface of the first support layer 21 away from the flexible display screen 10.

[0053] In other embodiments, the side of the first elastic layer 24 and the first adhesive layer 23 facing away from the second support layer 22 can be first bonded to one side surface of the first support layer 21, and then the surface of the first support layer 21 away from the second support layer 22 can be bonded to the non-display surface of the flexible display screen 10.

[0054] In one embodiment, the first support layer 21 is in direct contact with the flexible display screen 10. In other words, there are no other support layers, such as bottom plate film (BPF), between the first support layer 21 and the flexible display screen 10. This has the advantage of reducing the probability of creases and lowering the risk of creases.

[0055] According to the display module provided in this embodiment, by setting a first support layer 21 and a second support layer 22 stacked together, the first support layer 21 and the second support layer 22 form a double support layer structure, which improves the rigidity of the bending area BA, thereby improving the impact resistance of the back of the display module. At the same time, by opening a notch K in the first adhesive layer 23 between the first support layer 21 and the second support layer 22, and filling the notch K with a first elastic layer 24, the notch K ensures that the first support layer 21 and the second support layer 22 are separated from each other in the bending area SA, avoiding stress transmission from the second support layer 22 to the first support layer 21, reducing the mutual influence between the two, and increasing the stress release capability of the bending area SA through the first elastic layer 24, thereby further improving the impact resistance of the back of the display module and improving reliability.

[0056] Figure 4 for Figure 1 The diagram shows a partial schematic of the second cross-sectional structure of the module along line AA. Figure 4 The display module and Figure 2 The difference in the display module shown is that, in this embodiment, the display module further includes a filling portion 26, which fills the first hollow structure. The elasticity of the filling portion 26 is greater than that of the second support layer 22. The modulus of the filling portion 26 is greater than or equal to 0.1 MPa and less than or equal to 100 MPa. For example, the modulus of the filling portion 26 is 1 MPa, 10 MPa, 22 MPa, 24 MPa, 26 MPa, etc. For example, the material of the filling portion 26 is thermoplastic polyurethane elastomer.

[0057] In one embodiment, the filler portion 26 and the first elastic layer 24 may be made of the same or different materials. For example, in this embodiment, the first elastic layer 24 is bonded and fixed by a second adhesive layer 25 and a second support layer 22, and the first elastic layer 24 and the filler portion 26 are made of different materials.

[0058] Figure 5 for Figure 1 The diagram shown is a partial schematic of the third cross-sectional structure of the module along line AA. Figure 5 The display module and Figure 2 , Figure 3 The difference between the display modules shown is that, with Figure 2 Taking the display module shown as an example, in this embodiment, the first elastic layer 24 is in contact with the first support layer 21, and the first elastic layer 24 is in contact with the first adhesive layer 23. In this case, the first elastic layer 24 just fills the fracture K.

[0059] It should be noted that although the first elastic layer 24 and the first support layer 21 are in contact, they are not fixedly connected and can move relative to each other under external force. Similarly, although the first elastic layer 24 and the first adhesive layer 23 are in contact, they are not fixedly connected and can move relative to each other under external force.

[0060] In other embodiments, the first elastic layer 24 and the first support layer 21 may be in contact, and there may be a gap between the first elastic layer 24 and the first adhesive layer 23; or, there may be a gap between the first elastic layer 24 and the first support layer 21, and the first elastic layer 24 and the first adhesive layer 23 may be in contact.

[0061] According to the display module provided in this embodiment, by setting the first elastic layer 24 and the first support layer 21 to be in contact, and the first elastic layer 24 and the first adhesive layer 23 to be in contact, that is, the first elastic layer 24 fills the fracture K, so that there is no gap between the first elastic layer 24 and the first support layer 21 and the first adhesive layer 23, which is beneficial to improving the structural stability of the display module.

[0062] Figure 6 for Figure 1 The diagram shown is a partial schematic of the fourth cross-sectional structure of the module along line AA. Figure 6 The difference between the display module shown and the display module provided in any of the above embodiments is that, in this embodiment, the first elastic layer 24 and the filling portion 26 are connected, and the first elastic layer 24 and the filling portion 26 are made of the same material. In this case, the first elastic layer 24 and the filling portion 26 can be integrally manufactured, and there is no physical boundary between them, thereby eliminating the need for the second adhesive layer 25 between the first elastic layer 24 and the filling portion 26.

[0063] In this embodiment, the orthographic projection of the first hollow structure on the flexible display screen 10 is located within the orthographic projection range of the first elastic layer 24 on the flexible display screen 10.

[0064] like Figure 6The assembly process of the display module shown may include: First, using a coating process, a monolithic material layer is locally prepared within the first hollow structure of the second support layer 22 and on one side surface of the second support layer 22. This monolithic material layer includes a filling portion 26 filling the first hollow structure and a first elastic layer 24 located on one side of the second support layer 22. Second, a first adhesive layer 23 is adhered to the surface of the second support layer 22 on both sides of the first elastic layer 24 in the first direction x. When adhering the first adhesive layer 23, it can be divided into two parts: one part is adhered to the first side of the first elastic layer 24 in the first direction x, and the other part is adhered to the second side of the first elastic layer 24 in the first direction x. Next, the side of the first elastic layer 24 and the first adhesive layer 23 facing away from the second support layer 22 is adhered to the surface of the first support layer 21 facing away from the flexible display screen 10.

[0065] Figure 7 for Figure 1 The diagram shown is a partial schematic of the fifth cross-sectional structure of the module along line AA. Figure 7 The display module and Figure 6 The difference in the display module shown is that, in this embodiment, the display module further includes a second elastic layer 27. The second elastic layer 27 is located on the side of the filling portion 26 opposite to the first elastic layer 24. The second elastic layer 27 and the filling portion 26 are connected, and the second elastic layer 27 and the filling portion 26 are made of the same material. Since the first patterned structure Q1 of the second support layer 22 has poor resistance to external impact, by providing the second elastic layer 27, protection can be provided to the outside of the first patterned structure Q1, thereby further improving the impact resistance of the display module.

[0066] In one embodiment, the orthographic projection of the first elastic layer 24 onto the flexible display screen 10 is within the orthographic projection range of the second elastic layer 27 onto the flexible display screen 10.

[0067] like Figure 7The assembly process of the display module shown may include: First, using a coating process, a monolithic material layer is locally prepared within the first hollow structure of the second support layer 22 and on the first side surface of the second support layer 22. This monolithic material layer includes a filling portion 26 filling the first hollow structure and a first elastic layer 24 located on one side of the second support layer 22. Second, using a coating process, a second material layer is locally prepared on the second side surface of the second support layer 22. The second material layer contacts the first material layer within the first hollow structure, forming a monolithic structure. The second material layer includes a second elastic layer 27 located on the side of the second support layer 22 opposite to the first support layer 21. The filling portion 26 can be prepared using a single-sided coating process, or half of it can be prepared using a first-sided coating process, and the other half using a second-sided coating process. Next, a first adhesive layer 23 is adhered to the surface of the second support layer 22 on both sides of the first elastic layer 24 in the first direction x. When applying the first adhesive layer 23, it can be divided into two parts: one part is applied to the first side of the first elastic layer 24 in the first direction x, and the other part is applied to the second side of the first elastic layer 24 in the first direction x. Then, the side of the first elastic layer 24 and the first adhesive layer 23 facing away from the second support layer 22 is applied to the surface of the first support layer 21 facing away from the flexible display screen 10.

[0068] Figure 8 for Figure 1 The diagram shown is a partial schematic of the sixth cross-sectional structure of the module along line AA. Figure 8 The display module and Figure 7 The difference in the display module shown is that, in this embodiment, the second support layer 22 includes a groove U, the opening of the groove U is located on the side of the second support layer 22 away from the flexible display screen 10, the second elastic layer 27 is located in the groove U, and the surface of the second elastic layer 27 away from the flexible display screen 10 and the surface of the second support layer 22 away from the flexible display screen 10 are flush.

[0069] In this embodiment, the second support layer 22 includes a first hollow structure and a groove U, which are connected and arranged along the thickness direction of the second support layer 22. The orthographic projection of the groove U on the flexible display screen 10 covers the orthographic projection of the first hollow structure on the flexible display screen 10, and the orthographic projection of the first hollow structure on the flexible display screen 10 is located within the orthographic projection range of the groove U on the flexible display screen 10.

[0070] In one embodiment, the cross-sectional shape of the groove U is rectangular or trapezoidal in the cross-section formed by the first direction x and the second direction y. For example, when the cross-sectional shape of the groove U is trapezoidal, the width of the groove U gradually decreases in the direction close to the first support layer 21, that is, the cross-sectional shape of the groove U is a regular trapezoid.

[0071] According to the display module provided in this embodiment, by opening a groove U on the side of the second support layer 22 away from the first support layer 21, the second elastic layer 27 is disposed in the groove U, and the second elastic layer 27 and the second support layer 22 are flush with the surface away from the flexible display screen 10, thereby improving the flatness of the non-display surface of the display module.

[0072] Figure 9 for Figure 1 The diagram shown is a partial schematic of the seventh cross-sectional structure of the module along line AA. Figure 9 The difference between the display module shown and the display module provided in any of the above embodiments is that, with Figure 8 Taking the display module shown as an example, in this embodiment, the first support layer 21 has a second patterned structure Q2, which is located in the bending region SA. The second patterned structure Q2 can be a thinning pattern, a hollow pattern, or a combination of a thinning pattern and a hollow pattern.

[0073] In one embodiment, the first patterned structure Q1 has a first hollow structure, and the second patterned structure Q2 has a second hollow structure. The orthographic projections of the first hollow structure and the second hollow structure on the flexible display screen 10 do not overlap. This improves the uniformity of stiffness in the bending region SA.

[0074] Figure 10 for Figure 1 The diagram shown is a partial schematic of the eighth cross-sectional structure of the module along line AA. Figure 10 The difference between the display module shown and the display module provided in any of the above embodiments is that, with Figure 8 Taking the display module shown as an example, in this embodiment, the display module also includes a bottom plate film (BPF) 28, which is located between the first support layer 21 and the flexible display screen 10.

[0075] BPF (Boiler Pad) is a thin film material used to support and protect the underlying structure, primarily serving functions such as mechanical support, insulation, dust protection, and cushioning. BPF is typically composed of multiple layers of composite materials. For example, a BPF includes a substrate layer, as well as adhesive layers and functional coatings located on opposite sides of the substrate layer.

[0076] The substrate layer is used to provide support, and the material of the substrate layer includes any one of polyethylene terephthalate, polyimide, and polycarbonate.

[0077] The adhesive layer is used to bond the BPF to the flexible display screen 10. The adhesive layer material includes any one of acrylic adhesive, silicone adhesive, and polyurethane adhesive.

[0078] The functional coating includes at least one of an antistatic coating, an insulating layer, and a scratch-resistant layer. The antistatic coating is made of indium tin oxide. The insulating layer is made of materials such as SiO2 and polyester film. The scratch-resistant layer is made of UV-curable resin.

[0079] Figure 11 for Figure 1 The diagram shown is a partial schematic of the ninth cross-sectional structure of the module along line AA. Figure 11 The difference between the display module shown and the display module provided in any of the above embodiments is that, with Figure 10 Taking the display module shown as an example, in this embodiment, the display module also includes a polarizer 31, a third adhesive layer 33 and a first cover plate 34 that are stacked sequentially on the display side of the flexible display screen 10.

[0080] The third adhesive layer 33 can be optically clear adhesive (OCA) used to bond the polarizer 31 and the first cover plate 34.

[0081] The first cover plate 34 is, for example, a glass cover plate.

[0082] In one embodiment, the display module further includes a fourth adhesive layer 35 and a second cover plate 36, which are sequentially stacked on the side of the first cover plate 34 facing away from the flexible display screen 10.

[0083] The fourth adhesive layer 35 can be optically clear adhesive (OCA) for bonding the first cover plate 34 and the second cover plate 36. The first cover plate 34 and the second cover plate 36 can be made of the same or different materials. For example, the first cover plate 34 and the second cover plate 36 are made of glass.

[0084] Figure 12 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Figure 12 As shown, the display device 1000 includes the display module 100 provided in any embodiment of this application.

[0085] Display device 1000 is a product with image display function. For example, display device 1000 can be used to display static images, such as pictures or photographs. Display device 1000 can also be used to display moving images, such as videos.

[0086] Display device 1000 can be a laptop, mobile phone, handheld or portable computer, camera, camcorder, in-vehicle smart central control screen, calculator, smartwatch, GPS navigator, electronic photo, electronic billboard or sign, projector, etc.

[0087] In addition, the display device 1000 can also perform functions such as taking photos, recording videos, fingerprint recognition, and facial recognition. Accordingly, the display device 1000 also includes at least one functional module for implementing the above functions, such as an under-display camera or an under-display fingerprint recognition sensor.

[0088] The display device provided in this embodiment has the same technical effect as the display module provided in any embodiment of this application, namely, improving the ability of the back of the display device to withstand impact and improving reliability.

[0089] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0090] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A display module, characterized in that, It has a first zone, a bending zone, and a second zone that are sequentially connected along a first direction; The display module includes: Flexible display screen; The first support layer is located on the non-display side of the flexible display screen; The second support layer is located on the side of the first support layer opposite to the flexible display screen, and the second support layer has a first patterned structure, which is located in the bending area. A first adhesive layer, located between the first support layer and the second support layer, the first adhesive layer having a fracture point located in the bending region; and The first elastic layer is located within the fracture.

2. The display module according to claim 1, characterized in that, The modulus of the first support layer is greater than or equal to 10 GPa; Preferably, the first support layer comprises any one of ultra-thin glass and stainless steel sheet; and / or The material of the second support layer includes at least one of ultra-thin steel sheet, metal, titanium fiber, and titanium alloy.

3. The display module according to claim 1, characterized in that, In a second direction perpendicular to the flexible display screen, the thickness of the first elastic layer is less than or equal to the thickness of the first adhesive layer; Preferably, the elasticity of the first elastic layer is greater than or equal to that of the first adhesive layer; Preferably, the first elastic layer and the first support layer are in contact; Alternatively, there may be a gap between the first elastic layer and the first support layer; Preferably, the first elastic layer and the first adhesive layer are in contact; or, there is a gap between the first elastic layer and the first adhesive layer. Preferably, the first adhesive layer comprises an optically transparent adhesive; Preferably, the first elastic layer and the second support layer are fixedly connected; Preferably, the modulus of the first elastic layer is greater than or equal to 0.1 MPa and less than or equal to 100 MPa; Preferably, the material of the first elastic layer includes a thermoplastic polyurethane elastomer; Preferably, the orthographic projection of the fracture on the flexible display screen and the orthographic projection of the first patterned structure on the flexible display screen overlap.

4. The display module according to claim 1, characterized in that, It also includes a second adhesive layer, which is located between the first elastic layer and the second support layer; Preferably, the orthographic projection of the first elastic layer on the flexible display screen is located within the orthographic projection range of the first patterned structure on the flexible display screen; Preferably, the material of the second adhesive layer includes any one of optically transparent adhesive and easy-pull adhesive.

5. The display module according to claim 1, characterized in that, The first patterned structure includes a first hollow structure, and the orthographic projection of the first elastic layer on the flexible display screen and the orthographic projection of the first hollow structure on the flexible display screen at least partially overlap.

6. The display module according to claim 4, characterized in that, It also includes a filling portion that fills the first hollow structure, and the elasticity of the filling portion is greater than that of the second support layer; Preferably, the first hollow structure includes a strip-shaped hole that penetrates the second support layer along the thickness direction of the second support layer, and the filling portion fills the strip-shaped hole; Preferably, the modulus of the filling portion is greater than or equal to 0.1 MPa and less than or equal to 100 MPa; Preferably, the material of the filling portion includes thermoplastic polyurethane elastomer; Preferably, the filling portion and the first elastic layer are made of the same or different materials.

7. The display module according to claim 6, characterized in that, The first elastic layer is connected to the filling portion, and the first elastic layer and the filling portion are made of the same material; Preferably, the orthographic projection of the first hollow structure on the flexible display screen is located within the orthographic projection range of the first elastic layer on the flexible display screen; Preferably, the display module further includes a second elastic layer, which is located on the side of the filling portion opposite to the first elastic layer. The second elastic layer is connected to the filling portion, and the second elastic layer and the filling portion are made of the same material. Preferably, the orthographic projection of the first elastic layer on the flexible display screen is located within the orthographic projection range of the second elastic layer on the flexible display screen; Preferably, the second support layer includes a groove, the opening of which is located on the side of the second support layer opposite to the flexible display screen, the second elastic layer is located in the groove, and the surface of the second elastic layer opposite to the flexible display screen is flush with the surface of the second support layer opposite to the flexible display screen. Preferably, the groove is connected to the first hollow structure, and the orthographic projection of the groove on the flexible display screen covers the orthographic projection of the first hollow structure on the flexible display screen body.

8. The display module according to claim 1, characterized in that, The first support layer has a second patterned structure, which is located in the bending region; Preferably, the first patterned structure has a first hollow structure, the second patterned structure has a second hollow structure, and the orthographic projections of the first hollow structure and the second hollow structure on the flexible display screen do not overlap.

9. The display module according to claim 1, characterized in that, It also includes a support protective film, which is located between the first support layer and the flexible display screen; Preferably, the display module further includes a polarizer, a third adhesive layer, and a first cover plate, which are stacked sequentially on the side of the flexible display screen away from the first support layer. Preferably, the display module further includes a fourth adhesive layer and a second cover plate, which are sequentially stacked on the side of the first cover plate opposite to the flexible display screen.

10. A display device, characterized in that, The display module includes any one of claims 1-9.

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